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  Subjects -> ELECTRONICS (Total: 207 journals)
Showing 1 - 200 of 277 Journals sorted alphabetically
Acta Electronica Malaysia     Open Access  
Advanced Materials Technologies     Hybrid Journal   (Followers: 1)
Advances in Biosensors and Bioelectronics     Open Access   (Followers: 8)
Advances in Electrical and Electronic Engineering     Open Access   (Followers: 9)
Advances in Electronics     Open Access   (Followers: 100)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 8)
Advances in Microelectronic Engineering     Open Access   (Followers: 13)
Advances in Power Electronics     Open Access   (Followers: 41)
Advancing Microelectronics     Hybrid Journal  
American Journal of Electrical and Electronic Engineering     Open Access   (Followers: 28)
Annals of Telecommunications     Hybrid Journal   (Followers: 8)
APSIPA Transactions on Signal and Information Processing     Open Access   (Followers: 8)
Archives of Electrical Engineering     Open Access   (Followers: 16)
Australian Journal of Electrical and Electronics Engineering     Hybrid Journal  
Batteries     Open Access   (Followers: 9)
Batteries & Supercaps     Hybrid Journal   (Followers: 5)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 31)
Bioelectronics in Medicine     Hybrid Journal  
Biomedical Instrumentation & Technology     Hybrid Journal   (Followers: 6)
BULLETIN of National Technical University of Ukraine. Series RADIOTECHNIQUE. RADIOAPPARATUS BUILDING     Open Access   (Followers: 2)
Bulletin of the Polish Academy of Sciences : Technical Sciences     Open Access   (Followers: 1)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 47)
China Communications     Full-text available via subscription   (Followers: 9)
Chinese Journal of Electronics     Hybrid Journal  
Circuits and Systems     Open Access   (Followers: 15)
Consumer Electronics Times     Open Access   (Followers: 5)
Control Systems     Hybrid Journal   (Followers: 308)
ECTI Transactions on Computer and Information Technology (ECTI-CIT)     Open Access  
ECTI Transactions on Electrical Engineering, Electronics, and Communications     Open Access   (Followers: 2)
Edu Elektrika Journal     Open Access   (Followers: 1)
Electrica     Open Access  
Electronic Design     Partially Free   (Followers: 124)
Electronic Markets     Hybrid Journal   (Followers: 7)
Electronic Materials Letters     Hybrid Journal   (Followers: 4)
Electronics     Open Access   (Followers: 109)
Electronics and Communications in Japan     Hybrid Journal   (Followers: 10)
Electronics For You     Partially Free   (Followers: 103)
Electronics Letters     Hybrid Journal   (Followers: 26)
Elektronika ir Elektortechnika     Open Access   (Followers: 2)
Elkha : Jurnal Teknik Elektro     Open Access  
Emitor : Jurnal Teknik Elektro     Open Access   (Followers: 3)
Energy Harvesting and Systems     Hybrid Journal   (Followers: 4)
Energy Storage     Hybrid Journal   (Followers: 1)
Energy Storage Materials     Full-text available via subscription   (Followers: 4)
EPE Journal : European Power Electronics and Drives     Hybrid Journal  
EPJ Quantum Technology     Open Access   (Followers: 1)
EURASIP Journal on Embedded Systems     Open Access   (Followers: 11)
Facta Universitatis, Series : Electronics and Energetics     Open Access  
Foundations and Trends® in Communications and Information Theory     Full-text available via subscription   (Followers: 6)
Foundations and Trends® in Signal Processing     Full-text available via subscription   (Followers: 9)
Frequenz     Hybrid Journal   (Followers: 1)
Frontiers of Optoelectronics     Hybrid Journal   (Followers: 1)
IACR Transactions on Symmetric Cryptology     Open Access   (Followers: 1)
IEEE Antennas and Propagation Magazine     Hybrid Journal   (Followers: 102)
IEEE Antennas and Wireless Propagation Letters     Hybrid Journal   (Followers: 81)
IEEE Embedded Systems Letters     Hybrid Journal   (Followers: 57)
IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology     Hybrid Journal   (Followers: 3)
IEEE Journal of Emerging and Selected Topics in Power Electronics     Hybrid Journal   (Followers: 52)
IEEE Journal of the Electron Devices Society     Open Access   (Followers: 9)
IEEE Journal on Exploratory Solid-State Computational Devices and Circuits     Hybrid Journal   (Followers: 1)
IEEE Letters on Electromagnetic Compatibility Practice and Applications     Hybrid Journal   (Followers: 4)
IEEE Magnetics Letters     Hybrid Journal   (Followers: 7)
IEEE Nanotechnology Magazine     Hybrid Journal   (Followers: 42)
IEEE Open Journal of Circuits and Systems     Open Access   (Followers: 3)
IEEE Open Journal of Industry Applications     Open Access   (Followers: 3)
IEEE Open Journal of the Industrial Electronics Society     Open Access   (Followers: 3)
IEEE Power Electronics Magazine     Full-text available via subscription   (Followers: 77)
IEEE Pulse     Hybrid Journal   (Followers: 5)
IEEE Reviews in Biomedical Engineering     Hybrid Journal   (Followers: 23)
IEEE Solid-State Circuits Letters     Hybrid Journal   (Followers: 3)
IEEE Solid-State Circuits Magazine     Hybrid Journal   (Followers: 13)
IEEE Transactions on Aerospace and Electronic Systems     Hybrid Journal   (Followers: 369)
IEEE Transactions on Antennas and Propagation     Full-text available via subscription   (Followers: 74)
IEEE Transactions on Automatic Control     Hybrid Journal   (Followers: 64)
IEEE Transactions on Autonomous Mental Development     Hybrid Journal   (Followers: 8)
IEEE Transactions on Biomedical Engineering     Hybrid Journal   (Followers: 39)
IEEE Transactions on Broadcasting     Hybrid Journal   (Followers: 13)
IEEE Transactions on Circuits and Systems for Video Technology     Hybrid Journal   (Followers: 26)
IEEE Transactions on Consumer Electronics     Hybrid Journal   (Followers: 46)
IEEE Transactions on Electron Devices     Hybrid Journal   (Followers: 19)
IEEE Transactions on Geoscience and Remote Sensing     Hybrid Journal   (Followers: 228)
IEEE Transactions on Haptics     Hybrid Journal   (Followers: 5)
IEEE Transactions on Industrial Electronics     Hybrid Journal   (Followers: 75)
IEEE Transactions on Industry Applications     Hybrid Journal   (Followers: 40)
IEEE Transactions on Information Theory     Hybrid Journal   (Followers: 27)
IEEE Transactions on Learning Technologies     Full-text available via subscription   (Followers: 12)
IEEE Transactions on Power Electronics     Hybrid Journal   (Followers: 80)
IEEE Transactions on Services Computing     Hybrid Journal   (Followers: 4)
IEEE Transactions on Signal and Information Processing over Networks     Hybrid Journal   (Followers: 13)
IEEE Transactions on Software Engineering     Hybrid Journal   (Followers: 79)
IEEE Women in Engineering Magazine     Hybrid Journal   (Followers: 11)
IEEE/OSA Journal of Optical Communications and Networking     Hybrid Journal   (Followers: 16)
IEICE - Transactions on Electronics     Full-text available via subscription   (Followers: 12)
IEICE - Transactions on Information and Systems     Full-text available via subscription   (Followers: 5)
IET Cyber-Physical Systems : Theory & Applications     Open Access   (Followers: 1)
IET Energy Systems Integration     Open Access   (Followers: 1)
IET Microwaves, Antennas & Propagation     Hybrid Journal   (Followers: 36)
IET Nanodielectrics     Open Access  
IET Power Electronics     Hybrid Journal   (Followers: 61)
IET Smart Grid     Open Access   (Followers: 1)
IET Wireless Sensor Systems     Hybrid Journal   (Followers: 18)
IETE Journal of Education     Open Access   (Followers: 4)
IETE Journal of Research     Open Access   (Followers: 11)
IETE Technical Review     Open Access   (Followers: 13)
IJEIS (Indonesian Journal of Electronics and Instrumentation Systems)     Open Access   (Followers: 3)
Industrial Technology Research Journal Phranakhon Rajabhat University     Open Access  
Informatik-Spektrum     Hybrid Journal   (Followers: 2)
Instabilities in Silicon Devices     Full-text available via subscription   (Followers: 1)
Intelligent Transportation Systems Magazine, IEEE     Full-text available via subscription   (Followers: 14)
International Journal of Advanced Research in Computer Science and Electronics Engineering     Open Access   (Followers: 18)
International Journal of Advances in Telecommunications, Electrotechnics, Signals and Systems     Open Access   (Followers: 12)
International Journal of Antennas and Propagation     Open Access   (Followers: 11)
International Journal of Applied Electronics in Physics & Robotics     Open Access   (Followers: 4)
International Journal of Computational Vision and Robotics     Hybrid Journal   (Followers: 5)
International Journal of Control     Hybrid Journal   (Followers: 11)
International Journal of Electronics     Hybrid Journal   (Followers: 7)
International Journal of Electronics and Telecommunications     Open Access   (Followers: 13)
International Journal of Granular Computing, Rough Sets and Intelligent Systems     Hybrid Journal   (Followers: 3)
International Journal of High Speed Electronics and Systems     Hybrid Journal  
International Journal of Hybrid Intelligence     Hybrid Journal  
International Journal of Image, Graphics and Signal Processing     Open Access   (Followers: 16)
International Journal of Microwave and Wireless Technologies     Hybrid Journal   (Followers: 10)
International Journal of Nanoscience     Hybrid Journal   (Followers: 1)
International Journal of Numerical Modelling: Electronic Networks, Devices and Fields     Hybrid Journal   (Followers: 4)
International Journal of Power Electronics     Hybrid Journal   (Followers: 25)
International Journal of Review in Electronics & Communication Engineering     Open Access   (Followers: 4)
International Journal of Sensors, Wireless Communications and Control     Hybrid Journal   (Followers: 10)
International Journal of Systems, Control and Communications     Hybrid Journal   (Followers: 4)
International Journal of Wireless and Microwave Technologies     Open Access   (Followers: 6)
International Transaction of Electrical and Computer Engineers System     Open Access   (Followers: 2)
JAREE (Journal on Advanced Research in Electrical Engineering)     Open Access  
Journal of Biosensors & Bioelectronics     Open Access   (Followers: 4)
Journal of Advanced Dielectrics     Open Access   (Followers: 1)
Journal of Artificial Intelligence     Open Access   (Followers: 12)
Journal of Circuits, Systems, and Computers     Hybrid Journal   (Followers: 4)
Journal of Computational Intelligence and Electronic Systems     Full-text available via subscription   (Followers: 1)
Journal of Electrical and Electronics Engineering Research     Open Access   (Followers: 38)
Journal of Electrical Bioimpedance     Open Access  
Journal of Electrical Bioimpedance     Open Access   (Followers: 2)
Journal of Electrical Engineering & Electronic Technology     Hybrid Journal   (Followers: 7)
Journal of Electrical, Electronics and Informatics     Open Access  
Journal of Electromagnetic Analysis and Applications     Open Access   (Followers: 8)
Journal of Electromagnetic Waves and Applications     Hybrid Journal   (Followers: 9)
Journal of Electronic Design Technology     Full-text available via subscription   (Followers: 6)
Journal of Electronic Science and Technology     Open Access   (Followers: 1)
Journal of Electronics (China)     Hybrid Journal   (Followers: 5)
Journal of Energy Storage     Full-text available via subscription   (Followers: 4)
Journal of Engineered Fibers and Fabrics     Open Access   (Followers: 2)
Journal of Field Robotics     Hybrid Journal   (Followers: 4)
Journal of Guidance, Control, and Dynamics     Hybrid Journal   (Followers: 191)
Journal of Information and Telecommunication     Open Access   (Followers: 1)
Journal of Intelligent Procedures in Electrical Technology     Open Access   (Followers: 3)
Journal of Low Power Electronics     Full-text available via subscription   (Followers: 10)
Journal of Low Power Electronics and Applications     Open Access   (Followers: 10)
Journal of Microelectronics and Electronic Packaging     Hybrid Journal   (Followers: 1)
Journal of Microwave Power and Electromagnetic Energy     Hybrid Journal   (Followers: 3)
Journal of Microwaves, Optoelectronics and Electromagnetic Applications     Open Access   (Followers: 11)
Journal of Nuclear Cardiology     Hybrid Journal  
Journal of Optoelectronics Engineering     Open Access   (Followers: 4)
Journal of Physics B: Atomic, Molecular and Optical Physics     Hybrid Journal   (Followers: 32)
Journal of Power Electronics     Hybrid Journal   (Followers: 2)
Journal of Power Electronics & Power Systems     Full-text available via subscription   (Followers: 11)
Journal of Semiconductors     Full-text available via subscription   (Followers: 5)
Journal of Sensors     Open Access   (Followers: 27)
Journal of Signal and Information Processing     Open Access   (Followers: 8)
Jurnal ELTIKOM : Jurnal Teknik Elektro, Teknologi Informasi dan Komputer     Open Access  
Jurnal Rekayasa Elektrika     Open Access  
Jurnal Teknik Elektro     Open Access  
Jurnal Teknologi Elektro     Open Access  
Kinetik : Game Technology, Information System, Computer Network, Computing, Electronics, and Control     Open Access  
Majalah Ilmiah Teknologi Elektro : Journal of Electrical Technology     Open Access   (Followers: 2)
Metrology and Measurement Systems     Open Access   (Followers: 6)
Microelectronics and Solid State Electronics     Open Access   (Followers: 28)
Nanotechnology, Science and Applications     Open Access   (Followers: 6)
Nature Electronics     Hybrid Journal   (Followers: 1)
Networks: an International Journal     Hybrid Journal   (Followers: 5)
Open Electrical & Electronic Engineering Journal     Open Access  
Open Journal of Antennas and Propagation     Open Access   (Followers: 8)
Paladyn. Journal of Behavioral Robotics     Open Access   (Followers: 1)
Power Electronics and Drives     Open Access   (Followers: 2)
Problemy Peredachi Informatsii     Full-text available via subscription  
Progress in Quantum Electronics     Full-text available via subscription   (Followers: 7)
Radiophysics and Quantum Electronics     Hybrid Journal   (Followers: 2)
Recent Advances in Communications and Networking Technology     Hybrid Journal   (Followers: 3)
Recent Advances in Electrical & Electronic Engineering     Hybrid Journal   (Followers: 11)
Research & Reviews : Journal of Embedded System & Applications     Full-text available via subscription   (Followers: 6)
Revue Méditerranéenne des Télécommunications     Open Access  
Security and Communication Networks     Hybrid Journal   (Followers: 2)
Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of     Hybrid Journal   (Followers: 57)
Semiconductors and Semimetals     Full-text available via subscription   (Followers: 1)
Sensing and Imaging : An International Journal     Hybrid Journal   (Followers: 2)
Solid State Electronics Letters     Open Access  
Solid-State Electronics     Hybrid Journal   (Followers: 9)
Superconductor Science and Technology     Hybrid Journal   (Followers: 3)
Synthesis Lectures on Power Electronics     Full-text available via subscription   (Followers: 3)
Technical Report Electronics and Computer Engineering     Open Access  
TELE     Open Access  
Telematique     Open Access  
TELKOMNIKA (Telecommunication, Computing, Electronics and Control)     Open Access   (Followers: 9)
Transactions on Cryptographic Hardware and Embedded Systems     Open Access   (Followers: 2)

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Similar Journals
Journal Cover
IEEE Transactions on Automatic Control
Journal Prestige (SJR): 3.433
Citation Impact (citeScore): 6
Number of Followers: 64  
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 0018-9286
Published by IEEE Homepage  [229 journals]
  • IEEE Control Systems Society
    • Abstract: Provides a listing of current staff, committee members and society officers.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • IEEE Control Systems Society
    • Abstract: Provides a listing of current committee members and society officers.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • A Fast Distributed Asynchronous Newton-Based Optimization Algorithm
    • Authors: Fatemeh Mansoori;Ermin Wei;
      Pages: 2769 - 2784
      Abstract: One of the most important problems in the field of distributed optimization is the problem of minimizing a sum of local convex objective functions over a networked system. Most of the existing work in this area focuses on developing distributed algorithms in a synchronous setting under the presence of a central clock, where the agents need to wait for the slowest one to finish the update, before proceeding to the next iterate. Asynchronous distributed algorithms remove the need for a central coordinator, reduce the synchronization wait, and allow some agents to compute faster and execute more iterations. In the asynchronous setting, the only known algorithms for solving this problem could achieve an either linear or sublinear rate of convergence. In this paper, we build upon the existing literature to develop and analyze an asynchronous Newton-based method to solve a penalized version of the problem. We show that this algorithm guarantees almost sure convergence with a global linear and local quadratic rate in expectation. Numerical studies confirm the superior performance of our algorithm against other asynchronous methods.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Efficient Strategy Computation in Zero-Sum Asymmetric Information Repeated
    • Authors: Lichun Li;Jeff S. Shamma;
      Pages: 2785 - 2800
      Abstract: Zero-sum asymmetric information games model decision-making scenarios involving two competing players who have different information about the game being played. A particular case is that of nested information, where one (informed) player has superior information over the other (uninformed) player. This paper considers the case of nested information in repeated zero-sum games and studies the computation of strategies for both the informed and uninformed players for finite-horizon and discounted infinite-horizon nested information games. For finite-horizon settings, we exploit that for both players, the security strategy, and also the opponent's corresponding best response, depend only on the informed player's history of actions. Using this property, we formulate an linear program (LP) computation of player strategies that is linear in the size of the uninformed player's action set. For the infinite-horizon discounted game, we construct LP formulations to compute the approximated security strategies for both players, and show that the worst-case performance difference between the approximated security strategies and the security strategies converges to zero exponentially. Finally, we illustrate the results on a network interdiction game between an informed system administrator and an uniformed intruder.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Identification of Linear Models From Quantized Data: A Midpoint-Projection
    • Authors: Riccardo Sven Risuleo;Giulio Bottegal;Håkan Hjalmarsson;
      Pages: 2801 - 2813
      Abstract: In this article, we consider the identification of linear models from quantized output data. We develop a variational approximation of the likelihood function, which allows us to find variationally optimal approximations of the maximum-likelihood and maximum a posteriori estimates. We show that these estimates are obtained by projecting the midpoint in the quantization interval of each output measurement onto the column space of the input regression matrix. Interpreting the quantized output as a random variable, we derive its moments for generic noise distributions. For the case of Gaussian noise and Gaussian independent identically distributed input, we give an analytical characterization of the bias, which we use to build a bias-compensation scheme that leads to consistent estimates.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Continuous Twisting Algorithm for Third-Order Systems
    • Authors: Jesús Mendoza-Avila;Jaime A. Moreno;Leonid M. Fridman;
      Pages: 2814 - 2825
      Abstract: In this paper, two control schemes producing a continuous control signal are presented for a perturbed triple integrator: The continuous twisting algorithm (3-CTA) and the output feedback continuous twisting algorithm (3-OFCTA). The first one is a state feedback controller that ensures global finite-time stability of the origin, despite of Lipschitz, nonvanishing, and matched disturbances. It provides steady-state precision of fourth order of the output w.r.t. sampling step. The second one is an output feedback controller, which uses a third-order robust and exact differentiator as an observer. By requiring only information of the measurable output, the 3-OFCTA preserves all features of robustness, convergence, and precision of the state feedback 3-CTA. Moreover, it is proven that a separation principle applies, so that the gains of the controller and of the observer can be selected independently to assure stability.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Stochastic Semistability for Nonlinear Dynamical Systems With Application
           to Consensus on Networks With Communication Uncertainty
    • Authors: Wassim M. Haddad;Tanmay Rajpurohit;Xu Jin;
      Pages: 2826 - 2841
      Abstract: This article focuses on semistability and finite time semistability analysis and synthesis of stochastic dynamical systems having a continuum of equilibria. Stochastic semistability is the property whereby the solutions of a stochastic dynamical system almost surely converge to Lyapunov stable in probability equilibrium points determined by the system initial conditions. In this article, we extend the theories of semistability and finite-time semistability for deterministic dynamical systems to develop a rigorous framework for stochastic semistability and stochastic finite-time semistability. Specifically, Lyapunov and converse Lyapunov theorems for stochastic semistability are developed for dynamical systems driven by Markov diffusion processes. These results are then used to develop a general framework for designing semistable consensus protocols for dynamical networks in the face of stochastic communication uncertainty for achieving multiagent coordination tasks in finite time. The proposed controller architectures involve the exchange of generalized charge or energy state information between agents guaranteeing that the closed-loop dynamical network is stochastically semistable to an equipartitioned equilibrium representing a state of almost sure consensus consistent with basic thermodynamic principles.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Adaptive Control by Regulation-Triggered Batch Least Squares
    • Authors: Iasson Karafyllis;Maria Kontorinaki;Miroslav Krstic;
      Pages: 2842 - 2855
      Abstract: The paper extends a recently proposed indirect, certainty-equivalence, event-triggered adaptive control scheme to the case of nonobservable parameters. The extension is achieved by using a novel batch least-squares identifier (BaLSI), which is activated at the time of the events. BaLSI guarantees the finite-time asymptotic constancy of the parameter estimates and the fact that the trajectories of the closed-loop system follow the trajectories of the nominal closed-loop system (nominal in the sense of the asymptotic parameter estimate, not in the sense of the true unknown parameter). Thus, if the nominal feedback guarantees global asymptotic stability and local exponential stability, then unlike conventional adaptive control, the newly proposed event-triggered adaptive scheme guarantees global asymptotic regulation with a uniform exponential convergence rate. The developed adaptive scheme is tested to a well known control problem—the state regulation of the wing-rock model. Comparisons with other adaptive schemes are also provided for this particular problem.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Quantum State Filter With Disturbance and Noise
    • Authors: Jiaojiao Zhang;Shuang Cong;Qing Ling;Kezhi Li;Herschel Rabitz;
      Pages: 2856 - 2866
      Abstract: A quantum state filter (QSF) is proposed in this paper to estimate a low-rank quantum density matrix from informationally incomplete and contaminated measurements. There exist sparse disturbances on the quantum density matrix and Gaussian noise in the measurements. A proximal Jacobian variant of the alternating direction method of multipliers (PJ-ADMM) is proposed to design the QSF. The closed-form solutions to three resulting subproblems are given and the iterative QSF is developed. The proposed QSF is proved to be convergent and its superiority is demonstrated in the numerical illustrations compared with different state-of-the-art methods.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Uniting Observers
    • Authors: Daniele Astolfi;Romain Postoyan;Dragan Nešić;
      Pages: 2867 - 2882
      Abstract: We propose a framework for designing observers possessing global convergence properties and desired asymptotic behaviors for the state estimation of nonlinear systems. The proposed scheme consists in combining two given continuous-time observers: One, denoted as global, ensures (approximate) convergence of the estimation error for any initial condition ranging in some prescribed set, while the other, denoted as local, guarantees a desired local behavior. We make assumptions on the properties of these two observers, and not on their structures, and then explain how to unite them as a single scheme using hybrid techniques. Two case studies are provided to demonstrate the applicability of the framework. Finally, a numerical example is presented.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Efficient Liveness Assessment for Traffic States in Open, Irreversible,
           Dynamically Routed, Zone-Controlled Guidepath-Based Transport Systems
    • Authors: Spyros Reveliotis;Tomáš Masopust;
      Pages: 2883 - 2898
      Abstract: Open, irreversible, dynamically routed, zone-controlled guidepath-based transport systems model the operation of many automated unit-load material handling systems that are used in various production and distribution facilities. An important requirement for these systems is to preserve the system liveness—i.e., the ability of each system agent to reach any location of the underlying guidepath network—by blocking those traffic states that will result in deadlock and/or livelock. The remaining set of traffic states are characterized as “live.” The worst-case computational complexity of the decision problem of assessing the state liveness in the considered class of transport systems is an open issue. As a first contribution of this paper, we identify an extensive subclass of these traffic states, defined through the topology of an abstracting graphical representation of the “traffic state” concept, for which the corresponding problem of liveness assessment admits a polynomial solution, and we present the relevant algorithm for this assessment. But the development of the aforementioned results has also led to a new methodological framework for representing and analyzing the qualitative dynamics of the considered transport systems with respect to the reachability and the liveness problems that are the focus of this paper. This framework can enable an effective and efficient (but maybe not polynomial-complexity) resolution of the state liveness even for those traffic states that do not belong in the primary state class that is considered in this paper; we highlight this additional possibility in the closing part of this paper.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Stabilization of Highly Nonlinear Hybrid Systems by Feedback Control Based
           on Discrete-Time State Observations
    • Authors: Chen Fei;Weiyin Fei;Xuerong Mao;Dengfeng Xia;Litan Yan;
      Pages: 2899 - 2912
      Abstract: Given an unstable hybrid stochastic differential equation (SDE), can we design a feedback control, based on the discrete-time observations of the state at times $0, tau, 2tau, ldots$, so that the controlled hybrid SDE becomes asymptotically stable' It has been proved that this is possible if the drift and diffusion coefficients of the given hybrid SDE satisfy the linear growth condition. However, many hybrid SDEs in the real world do not satisfy this condition (namely, they are highly nonlinear) and there is no answer to the question, yet if the given SDE is highly nonlinear. The aim of this paper is to tackle the stabilization problem for a class of highly nonlinear hybrid SDEs. Under some reasonable conditions on the drift and diffusion coefficients, we show how to design the feedback control function and give an explicit bound on $tau$ (the time duration between two consecutive state observations), whence the new theory established in this paper is implementable.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Multilevel Power-Imbalance Allocation Control for Secondary Frequency
           Control of Power Systems
    • Authors: Kaihua Xi;Hai Xiang Lin;Chen Shen;Jan H. Van Schuppen;
      Pages: 2913 - 2928
      Abstract: A consensus-control-based multilevel control law named Multilevel Power-Imbalance Allocation Control (MLPIAC) is presented for a large-scale power system partitioned into two or more groups. Centralized control is implemented in each group while distributed control is implemented at the coordination level of the groups. Besides restoring nominal frequency with a minimal control cost, MLPIAC can improve the transient performance of the system through an accelerated convergence of the control inputs without oscillations. At the coordination level of the control groups, because the number of the groups is smaller than that of nodes, MLPIAC is more effective to obtain the minimized control cost than the purely distributed control law. At the level of the control in each group, because the number of nodes is much smaller than the total number of nodes in the whole network, the overheads in the communications and the computations are reduced compared to the pure centralized control. The asymptotic stability of MLPIAC is proven using the Lyapunov method and the performance is evaluated through simulations.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • $n$ +Infinite+Chains+of+Kinematic+Points+With+the+Immediate-Neighbors+Interaction+Dynamics&rft.title=IEEE+Transactions+on+Automatic+Control&rft.issn=0018-9286&rft.date=2020&rft.volume=65&rft.spage=2929&rft.epage=2940&rft.aulast=Pillai;&rft.aufirst=Chirayu&rft.au=Chirayu+D.+Athalye;Debasattam+Pal;Harish+K.+Pillai;">Behavior of $n$ Infinite Chains of Kinematic Points With the
           Immediate-Neighbors Interaction Dynamics
    • Authors: Chirayu D. Athalye;Debasattam Pal;Harish K. Pillai;
      Pages: 2929 - 2940
      Abstract: Consider $n$ doubly infinite chains of kinematic points, where kinematic points can move in a two-dimensional plane; these kinematic points could be vehicles/drones modeled as point masses. In this paper, we analyze the behavior, under bounded perturbations, of such $n$ infinite chains of kinematic points with respect to the immediate-neighbors interaction dynamics. We show that if the initial perturbations are bounded, then such an autonomous system converges to an equilibrium point. Furthermore, under some additional conditions, the autonomous system converges to the same equilibrium point in which it was before the perturbations.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • $2times+2$ +Hyperbolic+PDEs+Using+a+Backstepping+Transform&rft.title=IEEE+Transactions+on+Automatic+Control&rft.issn=0018-9286&rft.date=2020&rft.volume=65&rft.spage=2941&rft.epage=2956&rft.aulast=Meglio;&rft.aufirst=David&rft.au=David+Bou+Saba;Federico+Bribiesca-Argomedo;Jean+Auriol;Michael+Di+Loreto;Florent+Di+Meglio;">Stability Analysis for a Class of Linear $2times 2$ Hyperbolic PDEs Using
           a Backstepping Transform
    • Authors: David Bou Saba;Federico Bribiesca-Argomedo;Jean Auriol;Michael Di Loreto;Florent Di Meglio;
      Pages: 2941 - 2956
      Abstract: In this paper, we develop a sufficient stability condition for a class of coupled first-order linear hyperbolic partial differential equations (PDEs) with constant coefficients that appear when considering target systems for backstepping boundary control.Using a backstepping transform, the problem is reformulated as a stability problem for a difference equation with distributed delay. Finding the explicit solution to the backstepping kernels, we derive an explicit sufficient condition depending on the plant coefficients. This stability condition is compared to an existing stability result based on a Lyapunov analysis. Both the proposed and existing sufficient conditions are then contrasted in some examples to a (computationally expensive) numerical approximation of a necessary and sufficient condition for exponential stability to illustrate their conservatism.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Economic Model Predictive Control for Time-Varying Cost and Peak Demand
           Charge Optimization
    • Authors: Michael J. Risbeck;James B. Rawlings;
      Pages: 2957 - 2968
      Abstract: With the increasing prevalence of variable-supply electricity production, dynamic market structures, including time-varying prices and/or peak demand charges are becoming more common for electricity consumers. This framework requires consumers to consider both the time-varying amount of electricity (i.e., energy) consumed throughout the day as well as the maximum rate of electricity purchase (i.e., power) over a given period, typically a month. Because of this complexity, online optimization techniques such as economic model predictive control (MPC) are a natural tool for consumers to use to minimize cost. However, while closed-loop optimization of these pricing structures is already being proposed for various applications, little has been established about stability or performance properties of the closed-loop system. Due in particular to the peak penalty (which violates the principle of optimality if naively included in the objective function), this theoretical gap leaves the potential for pathological closed-loop behavior despite high-quality open-loop solutions. In this paper, we derive asymptotic performance and stability results for general time-varying economic MPC. We then present a novel extended-state formulation to convert peak demand charges into a time-varying stage cost that can be optimized using economic MPC. In addition, we give a terminal cost and constraint for the augmented system that avoids reducing the feasible set in the original space. Finally, we demonstrate these structures and the closed-loop properties that they satisfy via two illustrative examples.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Almost Global Stability of Nonlinear Switched Systems With Time-Dependent
    • Authors: Özkan Karabacak;Ayşegül Kıvılcım;Rafael Wisniewski;
      Pages: 2969 - 2978
      Abstract: For a dynamical system, it is known that the existence of a Lyapunov density implies almost global stability of an equilibrium. It is then natural to ask whether the existence of multiple Lyapunov densities for a nonlinear switched system implies almost global stability, in the same way as the existence of multiple Lyapunov functions implies global stability for nonlinear switched systems. In this paper, the answer to this question is shown to be affirmative as long as switchings satisfy a dwell time constraint with an arbitrarily small dwell time. Specifically, as the main result, we show that a nonlinear switched system with a minimum dwell time is almost globally stable if there exist multiple Lyapunov densities that satisfy some compatibility conditions depending on the value of the minimum dwell time. This result can also be used to obtain a minimum dwell time estimate to ensure almost global stability of a nonlinear switched systems. In particular, the existence of a common Lyapunov density implies almost global stability for any arbitrary small minimum dwell time. The results obtained for continuous-time switched systems are based on some sufficient conditions for the almost global stability of discrete-time nonautonomous systems. These conditions are obtained using the duality between Frobenius–Perron operator and Koopman operator.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Stochastic Control and Nonequilibrium Thermodynamics: Fundamental Limits
    • Authors: Yongxin Chen;Tryphon T. Georgiou;Allen Tannenbaum;
      Pages: 2979 - 2991
      Abstract: We consider damped stochastic systems in a controlled (time varying) potential and study their transition between specified Gibbs-equilibria states in finite time. By the second law of thermodynamics, the minimum amount of work needed for the transition from one equilibrium state to another is the difference between the Helmholtz free energy of the two states and can only be achieved by a reversible (infinitely slow) process. The minimal gap between the work needed in a finite-time transition and the work during a reversible one, turns out to equal the square of the optimal mass transport (Wasserstein-2) distance between the two end-point distributions times the inverse of the duration needed for the transition. This result, in fact, relates nonequilibrium optimal control strategies (protocols) to gradient flows of entropy functionals via the Jordan–Kinderlehrer–Otto scheme. The purpose of this paper is to introduce ideas and results from the emerging field of stochastic thermodynamics in the setting of the classical regulator theory, and to draw connections and derive such fundamental relations from a control perspective in a multivariable setting.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Observer Design for Nonlinear Networked Control Systems With Persistently
           Exciting Protocols
    • Authors: Alejandro I. Maass;Dragan Nešić;Romain Postoyan;Peter M. Dower;
      Pages: 2992 - 3006
      Abstract: We study the design of state observers for nonlinear networked control systems (NCSs) affected by disturbances and measurement noise, via an emulation-like approach. That is, given an observer designed with a specific stability property in the absence of communication constraints, we implement it over a network, and we provide sufficient conditions on the latter to preserve the stability property of the observer. In particular, we provide a bound on the maximum allowable transmission interval (MATI) that guarantees an input-to-state stability (ISS) property for the corresponding estimation error system. The stability analysis is trajectory-based, utilizes small-gain arguments, and exploits a persistently exciting property of the scheduling protocols. This property is key in our analysis and allows us to obtain significantly larger MATI bounds in comparison to the ones found in the literature. Our results hold for a general class of NCSs; however, we show that these results are also applicable to NCSs implemented over a specific physical network called WirelessHART (WH). The latter is mainly characterized by its multihop structure, slotted communication cycles, and the possibility to simultaneously transmit over different frequencies. We show that our results can be further improved by taking into account the intrinsic structure of the WH–NCS model. That is, we explicitly exploit the model structure in our analysis to obtain an even tighter MATI bound that guarantees the same ISS property for the estimation error system. Finally, to illustrate our results, we present analysis and numerical simulations for a class of Lipschitz nonlinear systems and high-gain observers.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Global Analysis of Synchronization Performance for Power Systems: Bridging
           the Theory-Practice Gap
    • Authors: Fernando Paganini;Enrique Mallada;
      Pages: 3007 - 3022
      Abstract: The issue of synchronization in the power grid is receiving renewed attention, as new energy sources with different dynamics enter the picture. Global metrics have been proposed to evaluate performance and calculated under highly simplified assumptions. In this article, we extend this approach to more realistic network scenarios and more closely connect it with metrics used in power engineering practice. In particular, our analysis covers networks with generators of heterogeneous ratings and richer dynamic models of machines. Under a suitable proportionality assumption in the parameters, we show that the step response of bus frequencies can be decomposed in two components. The first component is a system-wide frequency that captures the aggregate grid behavior, and the residual component represents the individual bus frequency deviations from the aggregate. Using this decomposition, we define—and compute in closed form—several metrics that capture dynamic behaviors that are of relevance for power engineers. In particular, using the system frequency, we define industry-style metrics (Nadir, RoCoF) that are evaluated through a representative machine. We further use the norm of the residual component to define a synchronization cost that can appropriately quantify interarea oscillations. Finally, we employ robustness analysis tools to evaluate deviations from our proportionality assumption. We show that the system frequency still captures the grid steady-state deviation, and becomes an accurate reduced-order model of the grid as the network connectivity grows. Simulation studies with practically relevant data are included to validate the theory and further illustrate the impact of network structure and parameters on synchronization. Our analysis gives conclusions of practical interest, sometimes challenging the conventional wisdom in the field.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Adaptive Control for a Class of Multi-Input Multi-Output Plants With
           Arbitrary Relative Degree
    • Authors: Zheng Qu;Benjamin T. Thomsen;Anuradha M. Annaswamy;
      Pages: 3023 - 3038
      Abstract: In this paper, a new adaptive output-feedback controller for a class of multi-input multi-output linear plant models with relative degree three or higher is developed. The adaptive controller includes a baseline design based on observers and parameter adaptation based on a modified closed-loop reference model. The overall design guarantees stability and tracking performance in the presence of large parametric uncertainties that are common in aircraft models with actuator dynamics. The requisite controller has a computational complexity that is an order of magnitude lower than that of a classical model reference adaptive controller. The proposed adaptive controller is evaluated using a model of a very flexible aircraft with second-order actuator dynamics and parametric uncertainties, and demonstrates stable command tracking behavior in scenarios that cause the failure of an linear quadratic regulator controller and an adaptive controller with a first-order actuator model.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • A Complete Characterization of Integral Input-to-State Stability and Its
           Small-Gain Theorem for Stochastic Systems
    • Authors: Hiroshi Ito;
      Pages: 3039 - 3052
      Abstract: For stochastic systems, this article develops a Lyapunov-type characterization of integral input-to-state stability (iISS), which is truly parallel to the deterministic one. In contrast to preceding results, this article allows stochastic noise to be active globally in the state space. Deriving pathwise bounds of stochastic processes is the original key idea and it leads to new techniques to unify Lyapunov-type characterization of iISS with that of input-to-state stability (ISS). The ISS test becomes a special case of the iISS test completely, which forms a stochastic counterpart of the popular iISS/ISS framework for deterministic nonlinear systems analysis and design. The usefulness of the developed iISS/ISS characterizations is substantiated by utilizing them to consolidate stochastic versions of small-gain criteria to establish stability of interconnected systems without restricting noise effects to bounded domains. The framework of integral noise-to-state stability is also made useful by allowing the global stochastic noise.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Kernel-Based Simultaneous Parameter-State Estimation for Continuous-Time
    • Authors: Peng Li;Francesca Boem;Gilberto Pin;Thomas Parisini;
      Pages: 3053 - 3059
      Abstract: In this article, the problem of jointly estimating the state and the parameters of continuous-time systems is addressed. Making use of suitably designed Volterra integral operators, the proposed estimator does not need the availability of time derivatives of the measurable signals, and the dependence on the unknown initial conditions is removed. As a result, the estimates converge to the true values in arbitrarily short time in a noise-free scenario. In the presence of bounded measurement and process disturbances, the estimation error is shown to be bounded. The numerical implementation aspects are dealt with, and extensive simulation results are provided showing the effectiveness of the estimator.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Backstepping Control of Coupled Linear Parabolic PDEs With Space and Time
           Dependent Coefficients
    • Authors: Simon Kerschbaum;Joachim Deutscher;
      Pages: 3060 - 3067
      Abstract: In this article, the backstepping design of stabilizing state feedback controllers for coupled linear parabolic PDEs with spatially varying distinct diffusion coefficients as well as space and time dependent reaction is presented. The selected target system is a cascade of exponentially stable, time-invariant systems, with time dependent couplings, that is uniformly exponentially stable with a prescribed rate of convergence. To determine the state feedback controller, the kernel equations are derived, which results in a set of coupled PDEs for a time dependent and spatially varying kernel. For this, the method of successive approximations is extended from the time-invariant case to the present problem. The applicability of the method is demonstrated by the stabilization of two coupled unstable parabolic PDEs with space and time dependent coefficients.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • A Generalized Framework For Kullback–Leibler Markov Aggregation
    • Authors: Rana Ali Amjad;Clemens Blöchl;Bernhard C. Geiger;
      Pages: 3068 - 3075
      Abstract: We propose an information-theoretic Markov aggregation framework that is motivated by two objectives: 1) The Markov chain observed through the aggregation mapping should be Markov. 2) The aggregated chain should retain the temporal dependence structure of the original chain. We analyze our parameterized cost function and show that it contains previous cost functions as special cases, which we critically assess. Our simple optimization heuristic for deterministic aggregations characterizes the optimization landscape for different parameter values.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • On the Stability Analysis of Mixed Traffic With Vehicles Under
           Car-Following and Bilateral Control
    • Authors: Liang Wang;Berthold K. P. Horn;
      Pages: 3076 - 3083
      Abstract: In this paper, we study mixed traffic flow in which some cars are under car-following control and others are under bilateral control. We also provide the necessary (modular string) stability condition for this type of mixed traffic, which can be viewed as an extension of the condition for pure car-following control-based traffic. This necessary stability condition provides some indication of how the introduction of self-driving cars (under bilateral control) will affect today's traffic.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • $2p$ th+Moment+Stability+of+Several+Classes+of+Linear+Stochastic+Systems&rft.title=IEEE+Transactions+on+Automatic+Control&rft.issn=0018-9286&rft.date=2020&rft.volume=65&rft.spage=3084&rft.epage=3091&rft.aulast=Deng;&rft.aufirst=Shixian&rft.au=Shixian+Luo;Feiqi+Deng;">Necessary and Sufficient Conditions for $2p$ th Moment Stability of
           Several Classes of Linear Stochastic Systems
    • Authors: Shixian Luo;Feiqi Deng;
      Pages: 3084 - 3091
      Abstract: This technical note presents necessary and sufficient conditions for $2p$th moment stability of several widely used linear stochastic systems. By the matrix derivative operator and vectorial Itô's formula, we first derive two extended systems: one is described by stochastic differential equation (SDE) and the other by ordinary differential equation (ODE). It is shown that the stochastic system is $2p$th-moment exponentially stable if and only if the SDE is mean-square exponentially stable or the ODE is exponentially stable. Subsequently, combining the quasi-periodic homogeneous polynomial Lyapunov function methods with the proposed techniques, a series of nonconservative stability criteria are established for linear impulsive, sampled-data, and switched stochastic systems under dwell-time constraints. A numerical example illustrates the proposed theoretical results.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Divergence Properties of Labeled Petri Nets and Their Relevance for
           Diagnosability Analysis
    • Authors: Alessandro Giua;Stéphane Lafortune;Carla Seatzu;
      Pages: 3092 - 3097
      Abstract: In this note, we focus on labeled Petri nets and formalize two properties, language divergence and marking divergence, discussing their relevance for diagnosability analysis. In particular, we review the results for diagnosability and $K$-diagnosability presented in an article entitled “A new approach for diagnosability analysis of Petri nets using verifier nets” that we coauthored. We show that these results apply to nets that are language divergence-free, an assumption that was not explicitly mentioned in that article. In addition, we also provide an alternative structural assumption—which does not require testing the behavioral property of divergence-freeness—under which the above results hold.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • A Modified Saddle-Point Dynamics for Distributed Convex Optimization on
           General Directed Graphs
    • Authors: Behrouz Touri;Bahman Gharesifard;
      Pages: 3098 - 3103
      Abstract: In this technical note, we show that the continuous-time saddle-point distributed convex optimization dynamics can be cast as a distributed control system, where each agent implements a control input using an estimate of the average state, generated through an observer. Using this, and by incorporating a continuous-time version of the so-called push-sum algorithm, we relax the graph-theoretic conditions under which the first component of the trajectories of this modified class of saddle-point dynamical systems is asymptotically convergent to the set of optimizers. In particular, we prove that strong connectivity is sufficient under this modified dynamics, relaxing the known weight-balanced assumption. As a by product, we also show that the saddle-point distributed optimization dynamics can be extended to time-varying weight-balanced graphs, which satisfy a persistency condition on the minimum-cut, of the sequence of Laplacian matrices.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Resilient Output Containment of Heterogeneous Cooperative and Adversarial
           Multigroup Systems
    • Authors: Shan Zuo;Frank L. Lewis;Ali Davoudi;
      Pages: 3104 - 3111
      Abstract: This note introduces a new concept of cooperative and adversarial multigroup system, which consists of cooperative leaders and followers, as well as adversaries. For example, cooperation of multiple military vehicles operate in complex dynamic networked environments with unknown enemies and hidden malicious attackers. The lack of global situational awareness in distributed settings makes autonomous vehicles prone to cyberattacks and infiltration. Each agent is unaware of the motives of its neighbors and may receive information/data from both the teammates and the adversaries. Secure and resilient control protocols are essential for the networked multigroup systems to prevent the adversaries’ attacks from propagating across the network, which may influence the system performance and even overall stability. To counter sensor faults and attacks from the adversaries, a distributed resilient control architecture is proposed, which guarantees uniform ultimate boundedness of the closed-loop dynamical system. Numerical simulations illustrate the effectiveness of the proposed results.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Asymptotic Behavior and Collision Avoidance in the Cucker–Smale
    • Authors: Xiuxia Yin;Dong Yue;Zili Chen;
      Pages: 3112 - 3119
      Abstract: For the long-range-communicated Cucker–Smale (C–S) model, asymptotic flocking can be obtained by taking full use of a key equality about the kinetic energy. However, such behavior does not exist for the short-range-communicated C–S model with general initial data. In this note, we first establish a new equality about the second-order velocity-position moments for general C–S models. Then, we use this equality to deduce a new type of asymptotic behavior for the short-range-communicated C–S model. Such behavior not only reflects an essential feature of the short-range communication weight, but also has some potential applications in the complex multicluster problem. Besides, collision avoidance is also obtained for the C–S model with some singular short-range communication weights.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Event-Triggered Dynamic Output Feedback Control for Switched Systems With
           Frequent Asynchronism
    • Authors: Zhongyang Fei;Chaoxu Guan;Xudong Zhao;
      Pages: 3120 - 3127
      Abstract: This paper addresses the event-triggered dynamic output feedback control for switched linear systems with frequent asynchronism. Different from existing work, which limits at most once switching during an interevent interval, we adopt the average dwell time approach without limiting the minimum dwell time of each subsystem, and thus frequent switching is allowed to happen in an interevent interval. Since the difficulty in acquiring the full information of system states, the dynamic output feedback controller is taken into account to stabilize the switched system. By employing a controller-mode-dependent Lyapunov functional, stability criterion is proposed for the resulting closed-loop system, based on which the dynamic output feedback controller together with the mode-dependent event-triggered mechanism is codesigned. Besides, the existence of the lower bound on interevent intervals is attentively discussed, which gets rid of the Zeno behavior. Finally, the effectiveness of the proposed method is illustrated by numerical simulations.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Fredholm Backstepping Control of Coupled Linear Parabolic PDEs With Input
           and Output Delays
    • Authors: Joachim Deutscher;Jakob Gabriel;
      Pages: 3128 - 3135
      Abstract: This paper considers the observer-based output feedback stabilization of coupled parabolic PDEs with spatially-varying coefficients and different diffusion coefficients subject to distinct constant input and output delays. By representing the delays in the form of homodirectional hyperbolic systems, a hyperbolic-parabolic PDE-PDE-PDE cascade is obtained. The state feedback controller design for this system is based on a Fredholm backstepping transformation mapping the closed-loop system into a stable PDE-PDE-PDE target system. With this, a minimum control time is achieved for the hyperbolic subsystem in the target dynamics. Then, this approach is extended to the design of a state observer for delayed measurements to obtain an observer-based output feedback controller. Exponential stability of the resulting closed-loop system is verified. Furthermore, it is shown that the Fredholm and backstepping transformations related to the hyperbolic subsystems are attainable in closed form. The new design procedure is demonstrated for the output feedback stabilization of two coupled parabolic PDEs with different input and output delays.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Exponential Stability of a Schrödinger Equation Through Boundary
           Coupling a Wave Equation
    • Authors: Jun-Min Wang;Fei Wang;Xiang-Dong Liu;
      Pages: 3136 - 3142
      Abstract: In this paper, we are concerned with the stability of a Schrödinger equation through boundary coupling with a wave equation, where an internal dissipative damping is designed at the wave equation. The energy decay of the Schrödinger equation is obtained by the boundary transmission between the Schrödinger and wave equations. By a detailed spectral analysis, we show that all the eigenvalues of both the Schrödinger and wave equations have negative real parts, and the whole system is exponentially stable. A numerical simulation is presented for the distributions of the spectrum of the whole system, and it is found that the spectrum of the Schrödinger equation depends largely on the boundary transmission parameter and the decay of the wave equation.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • On Positive Solutions of a Delay Equation Arising When Trading in
           Financial Markets
    • Authors: Chung-Han Hsieh;B. Ross Barmish;John A. Gubner;
      Pages: 3143 - 3149
      Abstract: We consider a discrete-time linear state equation with delay, which arises as a model for a trader's account value when buying and selling a risky asset in a financial market. The state equation includes a nonnegative feedback gain $alpha$ and a sequence $v(k)$, which models asset returns that are within known bounds but otherwise arbitrary. We introduce two thresholds, $alpha _-$ and $alpha _+$, depending on these bounds, and prove that for $alpha < alpha _-$, state positivity is guaranteed for all time and all asset-return sequences, i.e., bankruptcy is ruled out and positive solutions of the state equation are continuable indefinitely. On the other hand, for $alpha> alpha _+$, we show that there is always a sequence of asset returns for which the state fails to be positive for all time, i.e., along this sequence, bankruptcy occurs and the solution of the state equation ceases to be meaningful after some finite time. Finally, this article also includes a conjecture, which says that for the “gap” interval $alpha _- leq alpha leq alpha _+,$ state positivity is also guaranteed for all time. Support for the conjecture, both theoretical and computational, is provided.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Nonlinear Filtering Method Using a Switching Error Model for
           Outlier-Contaminated Observations
    • Authors: Akio Nakabayashi;Genta Ueno;
      Pages: 3150 - 3156
      Abstract: This article considers a nonlinear filtering method for handling outliers. The presence of outliers that are gross observation errors can greatly reduce the accuracy of filtering methods that assume Gaussian distributed errors. There are some existing methods that assume a Gaussian observation error, and estimate the error covariance matrix at each time step to avoid overfitting to the outliers. However, the estimates of the covariance matrix under such methods can become unstable. This results in underfitting or overfitting to observations when filtering. This paper presents a new method for handling outliers in nonlinear filtering problems by extending the unscented Kalman filter. In this method, two Gaussian observation error models with distinct covariance matrices are used: one for observations with regular errors, and another with a larger variance specified by a scale parameter for outliers. In addition to the system state, this method estimates an indicator variable that switches between the two models and the scale parameter for outliers. With the inclusion of the indicator variable and scale parameter, the estimated error covariance matrix can handle both regular observations and outliers appropriately at each time step. Furthermore, by estimating the scale parameter, the proposed method can be applied to a dataset without additional tuning to account for outlier characteristics. Through numerical experiments, we find that our method can estimate the system state better than existing methods for both datasets with and without outliers.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Structural Characterization of Linear Quantum Systems With Application to
           Back-Action Evading Measurement
    • Authors: Guofeng Zhang;Ian R. Petersen;Jinghao Li;
      Pages: 3157 - 3163
      Abstract: The purpose of this article is to study the structure of quantum linear systems in terms of their Kalman canonical form, which was proposed in a recent paper. The spectral structure of quantum linear systems is explored, which indicates that a quantum linear system is both controllable and observable provided that it is Hurwitz stable. A new parameterization method for quantum linear systems is proposed. This parameterization is designed for the Kalman canonical form directly. Consequently, the parameters involved are in a blockwise form in correspondence with the blockwise structure of the Kalman canonical form. This parameter structure can be used to simplify various quantum control design problems. For example, necessary and sufficient conditions for the realization of quantum back-action evading (BAE) measurements are given in terms of these new parameters. Due to their blockwise nature, a small number of parameters are required for realizing quantum BAE measurements.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Quasi-Polynomial-Based Robust Stability of Time-Delay Systems Can be Less
           Conservative Than Lyapunov–Krasovskii Approaches
    • Authors: Sara Angulo;Raymundo Márquez;Miguel Bernal;
      Pages: 3164 - 3169
      Abstract: In this article, stability of uncertain time-delay unforced systems is analyzed through a generalized characteristic quasi-polynomial, which is exactly rewritten as a polytope whose interpolating functions exhibit mutual dependence. It is shown that an adequate combination of Kharitonov-like results and Polya-like relaxations leads to progressively better results at the price of more demanding computational burden. Stability methodologies are developed and proved advantageous when compared with traditional Lyapunov-based approaches, both for structured and unstructured uncertainty.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • ${mathcal+{H}_infty+}$ +Riccati+Inequalities&rft.title=IEEE+Transactions+on+Automatic+Control&rft.issn=0018-9286&rft.date=2020&rft.volume=65&rft.spage=3170&rft.epage=3175&rft.aulast=Papachristodoulou;&rft.aufirst=Aivar&rft.au=Aivar+Sootla;Yang+Zheng;Antonis+Papachristodoulou;">On the Existence of Block-Diagonal Solutions to Lyapunov and ${mathcal
           {H}_infty }$ Riccati Inequalities
    • Authors: Aivar Sootla;Yang Zheng;Antonis Papachristodoulou;
      Pages: 3170 - 3175
      Abstract: In this note, we describe sufficient conditions when block-diagonal solutions to Lyapunov and ${mathcal {H}_infty }$ Riccati inequalities exist. In order to derive our results, we define a new type of comparison systems, which are positive and are computed using the state-space matrices of the original (possibly nonpositive) systems. Computing the comparison system involves only the calculation of ${mathcal {H}_infty }$ norms of its subsystems. We show that the stability of this comparison system implies the existence of block-diagonal solutions to Lyapunov and Riccati inequalities. Furthermore, our proof is constructive, and the overall framework allows the computation of block-diagonal solutions to these matrix inequalities with linear algebra and linear programming. Numerical examples illustrate our theoretical results.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Novel All-Pass Factorization, All Solutions to Rational Matrix Equation
           and Control Application
    • Authors: Jovan Stefanovski;
      Pages: 3176 - 3183
      Abstract: For an arbitrary rational matrix (RM), a new descriptor realization of its all-pass factorization is presented. The coefficients of the factors are expressed explicitly in the solution of a linear matrix inequality, which is well known in control theory. Using the all-pass factorization, necessary and sufficient conditions for existence of a solution of an equation with RMs where the unknown RM has its poles in the left closed complex half plane and it can be improper are presented, as well as all solutions. As an application of the latter result, the notion of almost disturbance decoupling, i.e., when the infimum of the ${mathscr {H}}_{infty}$ norm of the transfer matrix from the disturbance input to the controlled output over the stabilizing controllers is zero, is generalized. The generalization is such that instead of the whole frequency axis, the frequency axis with excluded intervals of small lengths, is considered. The controller consists of output feedback plus disturbance feedforward designed independently. A necessary and sufficient solvability condition is presented, which is expressed in terms of the given data. The three main results are illustrated by an example.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Extremum Seeking Control With Input Dead-Zone
    • Authors: Guangru Shao;Andrew R. Teel;Ying Tan;Kun-Zhi Liu;Rui Wang;
      Pages: 3184 - 3190
      Abstract: This article develops a novel extremum seeking control (ESC) scheme to address an input dead-zone. The new ESC scheme includes two parts: one is the learning mechanism that can rapidly compensate the effect of the dead-zone; the other is the classic ESC scheme, which can regulate the output of the system to an arbitrarily small neighborhood of its extremum. The proposed scheme has a two-time-scale structure, and the boundary layer system is uniformly, practically, and asymptotically stable. By applying results that exist in the literature, semi-global practical asymptotic stability of the new ESC scheme is established. Finally, numerical examples are presented to illustrate the effectiveness of the proposed scheme.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Model Predictive Tracking Control for Invariant Systems on Matrix Lie
           Groups via Stable Embedding Into Euclidean Spaces
    • Authors: Dong Eui Chang;Karmvir Singh Phogat;Jongeun Choi;
      Pages: 3191 - 3198
      Abstract: For controller design for systems on manifolds embedded in Euclidean space, it is convenient to utilize a theory that requires a single global coordinate system on the ambient Euclidean space rather than multiple local charts on the manifold or coordinate-free tools from differential geometry. In this article, we apply such a theory to design model predictive tracking controllers for systems whose dynamics evolve on manifolds and illustrate its efficacy with the fully actuated rigid body attitude control system.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Risk Probability Minimization Problems for Continuous-Time Markov Decision
           Processes on Finite Horizon
    • Authors: Haifeng Huo;Xianping Guo;
      Pages: 3199 - 3206
      Abstract: This article deals with a risk probability minimization problem for finite horizon continuous-time Markov decision processes with unbounded transition rates and history-dependent policies. Only using the assumption of nonexplosion of the controlled state process as well as the finiteness of actions available at each state, we not only establish the existence and uniqueness of a solution to the corresponding optimality equation, but also prove the existence of a risk probability optimal policy. Finally, we give two examples to illustrate our results: one example shows that the value iteration algorithm is provided for computing both the value function and an optimal risk probability policy, and the other shows the differences between the conditions in this article and those in the previous literature.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • A Reference Governor for Nonlinear Systems With Disturbance Inputs Based
           on Logarithmic Norms and Quadratic Programming
    • Authors: Nan Li;Ilya V. Kolmanovsky;Anouck Girard;
      Pages: 3207 - 3214
      Abstract: This note describes a reference governor design for a continuous-time nonlinear system with an additive disturbance. The design is based on predicting the response of the nonlinear system, by the response of a linear model with a set-bounded prediction error, where a state-and-input-dependent bound on the prediction error is explicitly characterized using logarithmic norms. The online optimization is reduced to a convex quadratic program with linear inequality constraints. Two numerical examples are reported.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Leader-Following Consensus for Linear Multiagent Systems via Asynchronous
           Sampled-Data Control
    • Authors: Wei Liu;Jie Huang;
      Pages: 3215 - 3222
      Abstract: In this article, we consider the sampled-data leader-following consensus problem for a class of general linear multiagent systems over both static directed networks and switching directed networks. A distributed asynchronous sampled-data state feedback control law is proposed. We show by Lyapunov analysis that the problem can be solved by the proposed control law as long as the sampling periods of all agents are smaller than a given threshold, which can be explicitly calculated. An example is given to illustrate the effectiveness of our approach.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Correction to the Paper “A Robust IDA-PBC Approach for Handling
           Uncertainties in Underactuated Mechanical Systems”
    • Authors: Alejandro Donaire;Jose Guadalupe Romero;Romeo Ortega;
      Pages: 3223 - 3226
      Abstract: In this note, it is shown that the results claimed in the paper [1]—as well as the examples presented there—are incorrect.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Technology insight on demand on IEEE.tv [Advertisement]
    • Pages: 3227 - 3227
      Abstract: Internet television gets a mobile makeover. A mobile version of IEEE.tv is now available for convenient viewing. Plus a new app for IEEE.tv can also be found in your app store. Bring an entire network of technology insight with you: (1) Convenient access to generations of industry leaders. (2) See the inner-workings of the newest innovations. (3) Find the trends that are shaping the future. IEEE Members receive exclusive access to award-winning programs that bring them face-to-face with the what, who, and how of technology today. Tune in to where technology lives www.ieee.tv
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
  • Proceedings of the IEEE [Advertisement]
    • Pages: 3228 - 3228
      Abstract: Advertisement: One of the most influential reference resources for engineers around the world. For over 100 years, Proceedings of the IEEE has been the leading journal for engineers looking for in-depth tutorial, survey, and review coverage of the technical developments that shape our world. Offering practical, fully referenced articles, Proceedings of the IEEE serves as a bridge to help readers understand important technologies in the areas of electrical engineering and computer science.
      PubDate: July 2020
      Issue No: Vol. 65, No. 7 (2020)
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