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  Subjects -> AERONAUTICS AND SPACE FLIGHT (Total: 124 journals)
Showing 1 - 30 of 30 Journals sorted by number of followers
AIAA Journal     Hybrid Journal   (Followers: 1003)
SpaceNews     Free   (Followers: 779)
Journal of Spacecraft and Rockets     Hybrid Journal   (Followers: 704)
Journal of Propulsion and Power     Hybrid Journal   (Followers: 571)
Aviation Week     Full-text available via subscription   (Followers: 412)
Aerospace Science and Technology     Hybrid Journal   (Followers: 308)
Advances in Space Research     Hybrid Journal   (Followers: 296)
IEEE Transactions on Aerospace and Electronic Systems     Hybrid Journal   (Followers: 281)
Journal of Aircraft     Hybrid Journal   (Followers: 264)
IEEE Aerospace and Electronic Systems Magazine     Full-text available via subscription   (Followers: 252)
Control Systems     Hybrid Journal   (Followers: 236)
Acta Astronautica     Hybrid Journal   (Followers: 220)
Gyroscopy and Navigation     Hybrid Journal   (Followers: 178)
Journal of Navigation     Hybrid Journal   (Followers: 178)
Journal of Guidance, Control, and Dynamics     Hybrid Journal   (Followers: 165)
Aircraft Engineering and Aerospace Technology     Hybrid Journal   (Followers: 139)
Space Science International     Open Access   (Followers: 118)
Space Science Reviews     Hybrid Journal   (Followers: 92)
Propulsion and Power Research     Open Access   (Followers: 89)
International Journal of Aerospace Engineering     Open Access   (Followers: 86)
Progress in Aerospace Sciences     Full-text available via subscription   (Followers: 82)
Advances in Aerospace Engineering     Open Access   (Followers: 74)
Journal of Aerospace Engineering     Full-text available via subscription   (Followers: 66)
Aerospace     Open Access   (Followers: 64)
Journal of Aerospace Information Systems     Hybrid Journal   (Followers: 57)
Space Safety Magazine     Free   (Followers: 50)
International Journal of Aerodynamics     Hybrid Journal   (Followers: 46)
IEEE Transactions on Circuits and Systems I: Regular Papers     Hybrid Journal   (Followers: 43)
Space Research Today     Full-text available via subscription   (Followers: 43)
Proceedings of the Institution of Mechanical Engineers Part G: Journal of Aerospace Engineering     Hybrid Journal   (Followers: 42)
International Journal of Aeroacoustics     Hybrid Journal   (Followers: 37)
International Journal of Aerospace Sciences     Open Access   (Followers: 36)
Canadian Aeronautics and Space Journal     Full-text available via subscription   (Followers: 31)
Space Policy     Hybrid Journal   (Followers: 30)
Journal of Space Weather and Space Climate     Open Access   (Followers: 30)
CEAS Aeronautical Journal     Hybrid Journal   (Followers: 30)
Journal of Aerodynamics     Open Access   (Followers: 27)
Journal of Aerospace Information Systems     Hybrid Journal   (Followers: 27)
Egyptian Journal of Remote Sensing and Space Science     Open Access   (Followers: 25)
Russian Aeronautics (Iz VUZ)     Hybrid Journal   (Followers: 23)
International Journal of Aerospace Innovations     Full-text available via subscription   (Followers: 23)
Aviation Psychology and Applied Human Factors     Hybrid Journal   (Followers: 23)
Aerospace Medicine and Human Performance     Full-text available via subscription   (Followers: 22)
International Journal of Aerospace Psychology     Hybrid Journal   (Followers: 22)
Journal of Aerospace Engineering & Technology     Full-text available via subscription   (Followers: 22)
Journal of Wind Engineering and Industrial Aerodynamics     Hybrid Journal   (Followers: 21)
Artificial Satellites     Open Access   (Followers: 21)
Fatigue of Aircraft Structures     Open Access   (Followers: 21)
Research & Reviews : Journal of Space Science & Technology     Full-text available via subscription   (Followers: 20)
Frontiers in Aerospace Engineering     Open Access   (Followers: 20)
International Journal of Space Structures     Full-text available via subscription   (Followers: 19)
Nonlinear Dynamics     Hybrid Journal   (Followers: 19)
Chinese Journal of Aeronautics     Open Access   (Followers: 19)
Proceedings of the Human Factors and Ergonomics Society Annual Meeting     Hybrid Journal   (Followers: 16)
International Journal of Satellite Communications Policy and Management     Hybrid Journal   (Followers: 15)
Frontiers in Astronomy and Space Sciences     Open Access   (Followers: 15)
Journal of Aircraft and Spacecraft Technology     Open Access   (Followers: 15)
Advances in Aerospace Science and Technology     Open Access   (Followers: 14)
International Journal of Space Science and Engineering     Hybrid Journal   (Followers: 13)
Aviation     Open Access   (Followers: 12)
International Journal of Micro Air Vehicles     Open Access   (Followers: 11)
Journal of Airline and Airport Management     Open Access   (Followers: 11)
Journal of the Astronautical Sciences     Hybrid Journal   (Followers: 11)
International Journal of Space Technology Management and Innovation     Full-text available via subscription   (Followers: 11)
Population Space and Place     Hybrid Journal   (Followers: 10)
Journal of Aviation Technology and Engineering     Open Access   (Followers: 10)
Journal of Aeronautical Materials     Open Access   (Followers: 10)
Aerospace Systems     Hybrid Journal   (Followers: 10)
International Journal of Crashworthiness     Hybrid Journal   (Followers: 10)
Journal of Aerospace Technology and Management     Open Access   (Followers: 10)
Aeronautical Journal, The     Hybrid Journal   (Followers: 9)
Journal of the American Helicopter Society     Full-text available via subscription   (Followers: 9)
International Journal of Aviation, Aeronautics, and Aerospace     Open Access   (Followers: 9)
International Journal of Aviation Technology, Engineering and Management     Full-text available via subscription   (Followers: 8)
Journal of Space Safety Engineering     Hybrid Journal   (Followers: 8)
International Journal of Applied Geospatial Research     Hybrid Journal   (Followers: 7)
Transportmetrica A : Transport Science     Hybrid Journal   (Followers: 7)
Aerospace technic and technology     Open Access   (Followers: 7)
Aviation in Focus - Journal of Aeronautical Sciences     Open Access   (Followers: 7)
New Space     Hybrid Journal   (Followers: 6)
Space and Polity     Hybrid Journal   (Followers: 6)
Aerotecnica Missili & Spazio : Journal of Aerospace Science, Technologies & Systems     Hybrid Journal   (Followers: 6)
Civil Aviation High Technologies     Open Access   (Followers: 6)
Air Medical Journal     Hybrid Journal   (Followers: 6)
REACH - Reviews in Human Space Exploration     Full-text available via subscription   (Followers: 5)
RocketSTEM     Free   (Followers: 5)
International Journal of Sustainable Aviation     Hybrid Journal   (Followers: 5)
Journal of Astrobiology & Outreach     Open Access   (Followers: 5)
Life Sciences in Space Research     Hybrid Journal   (Followers: 5)
International Journal of Aviation Management     Hybrid Journal   (Followers: 5)
Cosmic Research     Hybrid Journal   (Followers: 5)
Journal of Spatial Science     Hybrid Journal   (Followers: 4)
Journal of KONBiN     Open Access   (Followers: 4)
Astrodynamics     Hybrid Journal   (Followers: 4)
International Journal of Aeronautical and Space Sciences     Hybrid Journal   (Followers: 4)
Unmanned Systems     Hybrid Journal   (Followers: 4)
Transport and Aerospace Engineering     Open Access   (Followers: 4)
Open Aerospace Engineering Journal     Open Access   (Followers: 4)
Problemy Mechatroniki. Uzbrojenie, lotnictwo, inżynieria bezpieczeństwa / Problems of Mechatronics. Armament, Aviation, Safety Engineering     Open Access   (Followers: 3)
Microgravity Science and Technology     Hybrid Journal   (Followers: 3)
Journal of the Australasian Society of Aerospace Medicine     Open Access   (Followers: 3)
npj Microgravity     Open Access   (Followers: 3)
ASTRA Proceedings     Open Access   (Followers: 3)
MAD - Magazine of Aviation Development     Open Access   (Followers: 3)
Ciencia y Poder Aéreo     Open Access   (Followers: 3)
Journal of Aviation/Aerospace Education & Research     Open Access   (Followers: 2)
Advances in Astronautics Science and Technology     Hybrid Journal   (Followers: 2)
Journal of Engineering and Technological Sciences     Open Access   (Followers: 2)
IEEE Journal on Miniaturization for Air and Space Systems     Hybrid Journal   (Followers: 2)
Perspectives of Earth and Space Scientists i     Open Access   (Followers: 1)
Investigación Pecuaria     Open Access   (Followers: 1)
Transactions on Aerospace Research     Open Access   (Followers: 1)
Вісник Національного Авіаційного Університету     Open Access   (Followers: 1)
Science and Education : Scientific Publication of BMSTU     Open Access   (Followers: 1)
Spatial Information Research     Hybrid Journal   (Followers: 1)
Xibei Gongye Daxue Xuebao / Journal of Northwestern Polytechnical University     Open Access  
Mekanika : Jurnal Teknik Mesin i     Open Access  

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Similar Journals
Journal Cover
Aerospace Systems
Number of Followers: 10  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 2523-3947 - ISSN (Online) 2523-3955
Published by Springer-Verlag Homepage  [2469 journals]
  • Gain-scheduled anti-windup PID control for LPV systems under actuator
           saturation and its application to aircraft

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      Abstract: Abstract To fill in the gap between theory and practice, this paper presents a gain-scheduled anti-windup proportional-integral-derivative (PID) control strategy for linear parameter-varying (LPV) systems with actuator saturation. Using the relationship between saturation and deadzone nonlinearities, the resulting closed-loop system is recast into a system with a deadzone nonlinearity. With the aid of a parameter-dependent sector condition, the stability and \(\mathcal {L}_2\) performance of the closed-loop system are elaborated using parameter-dependent Lyapunov approach. The developed synthesis condition is first formulated in terms of bilinear matrix inequalities (BMIs), which cannot be easily solved. Then, a set of linear matrix inequalities (LMIs) is derived by employing Finsler’s lemma. Finally, the proposed control strategy is applied to the flight control design of a lateral-directional aircraft system to illustrate its effectiveness and application potential.
      PubDate: 2022-05-12
       
  • Modeling and simulation of a direct-ascent anti-satellite missile using
           Kerbal Space Program (KSP)

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      Abstract: Abstract In the modern battlefield, the importance of satellites as both strategic and tactical assets is well established. They provide functions such as reconnaissance, navigation, early warning and surveillance, weapon guidance and so on. Due to this, there arises a need to counter or destroy these satellites in times of conflict. Hence many types of Anti-Satellite weapons were developed such as kinetic and non-kinetic, direct-ascent, co-orbital, etc. In this paper, Kerbal Space Program (KSP) which is a space flight simulation game is used for modeling and simulation. Using KSP, simulated destruction of a satellite in a circular Low Earth Orbit (LEO) by a direct-ascent Anti-Satellite (ASAT) missile is carried out. Parameters and characteristics of the missile and its different stages are presented. The amount of energy released during the terminal phase of interception is calculated and it is concluded that the impact of Kill Vehicle (KV) imparts enough energy to destroy the satellite without any need of a warhead with conventional explosives. The literature pertaining to KSP and other such simulation software is presented. It is proposed that KSP should be used as an educational and concept development platform. Further scopes and challenges to improve this simulation are discussed.
      PubDate: 2022-05-06
       
  • Adaptive risk-free coordinated trajectory planning for UAV cluster in
           dynamic obstacle environment

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      Abstract: Abstract Without local adjustment mechanism for planning paths of unmanned aerial vehicles (UAVs), traditional path planning methods based on reinforcement learning are capable of global path planning only, requiring repeated training to adapt to potential changes in the environment. For solving the collaborative path planning problem of a UAV cluster in a dynamic obstacle environment, in this paper, an adaptive risk-free method is proposed for multiple UAVs to design coordinated trajectory with environment adaptability. The method integrates a type of Q-learning algorithm, which is risk free for its awareness of risk avoidance, and dynamic window approach, which can generate adaptability to dynamic changes of environmental risks. Built on the Reynold cluster model to describe a generalized UAV cooperative motion mathematically and designed with the principle of repulsion to ensure the safety of the cluster, a typical task of multi-UAV risk-free movement is established to verify the proposed coordinated path planning method. The simulation results have demonstrated that during the entire process, the cluster keeps a safe distance from dynamic obstacles, showing effectiveness of security and coordination and strong adaptability to the dynamic obstacle environment.
      PubDate: 2022-05-06
       
  • Aircraft wing vibration parameters measurement system using MEMS IMUs and
           closed-loop optimal correction

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      Abstract: Abstract Nowadays, there is still a need for the development of a high-precision measurement system for aircraft structural elements vibrations, this is due to the fact that many aviation problems are associated with analyzing vibration characteristics of aircraft mechanical structures during its main modes of operation, including flight, particularly the airplane wing health monitoring. This paper presents preliminary results of research carried out toward building a promising system designed to measure vibration parameters of airplane wing. Comparing it with the existing analogues systems, the proposed system features the use of approaches that are traditional for solving orientation and navigation problems for vibration measurements. The article discusses the principles of building such system based on micromechanical inertial measurements units, displacement sensors, on-board aircraft navigation system and sensor data fusion technology. The paper provides a brief overview of the existing solutions in this field of research, and substantiates the relevance and feasibility of the proposed technical solution. The paper presents the basic hardware components of the proposed system, presents the fundamentals of its operation based on the data collected from many sources, including displacement sensors, inertial units and the optimal Kalman estimation and correction algorithm. Besides, the paper presents the mathematical errors models of the system main components. The main algorithms of the system are shown, including algorithms for inertial measurements, estimation and correction in a closed-loop scheme for including optimal Kalman filter, and indirect calculations of vibration parameters. Finally, the initial simulation results of system operation are shown, demonstrating its operability and expected accuracy characteristics, which confirms the system effectiveness and the prospects of the chosen direction of research.
      PubDate: 2022-05-06
       
  • Development of indoor folding method for tethered aerostat envelope to
           stow for long duration safely

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      Abstract: Abstract Aerostat plays important role in lighter than air system. There is a huge balloon-like structure called an envelope with hydrogen or helium in it which makes it lighter, just by generating up-thrust force to lift up this envelope. The mini aerostat envelope is 70 m3 in volume. When we try to fold this envelope erratically, it may cause various problems like wrinkle formation on envelope, more time to inflate envelope and more manpower to inflate envelope. This paper focuses on a problem and solution for wrinkles formation, quick inflation of envelope and stowing for long when the envelope is folded. We have also given solutions to problems using methodologies like the score of matrix method, past research done by others, principal of product design, and development of folding methodology.
      PubDate: 2022-04-28
       
  • Intelligent sensing and control for aerospace unmanned systems

    • Free pre-print version: Loading...

      PubDate: 2022-04-13
       
  • Joint image pansharpening and registration via structure tensor total
           variation regularization

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      Abstract: Abstract Pansharpening has been extensively studied in recent years. However, one drawback of the known image fusion methods is that the fusion performance is degraded by the registration error. We develops a variational framework for joint pansharpening and registration with structure tensor total variation regularization method. The proposed framework can fully capture the target image’s first-order information around a local neighborhood and align image gradient domain. An efficient optimization method based on the scheme of fast iterative shrinkage-thresholding algorithm (FISTA) is proposed to solve the objective fusion model. This framework consists of two key steps: (i) pansharpening with structure tensor total variation regularization; (ii) image registration in image gradient domain. Extensive experiments demonstrate the effectiveness of our method compared with the existing state-of-the-art fusion models.
      PubDate: 2022-04-05
       
  • An energy absorber based on foam-filled composite tubes and simulation of
           its application to crashworthy seats

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      Abstract: Abstract This paper presents an energy absorber made of composite tubes and metal connectors. The composite tube is filled with foam. When it is subjected to impact, the composite tube is axially compressed and collapsed. The tube-wall folds inward and squeeze the foam. There is no fragment overflowing after the composite tube was collapsed and the fragments fills in the tube to increase the energy absorption. The impact energy is mainly absorbed by fiber breakage, delamination and foam squash. A dynamic impact test was carried out to explore the energy absorption performance of the absorber. The results proved that it can reduce the initial peak load and increase the specific energy absorption, which is suitable for lightweight and crashworthy structure design. To investigate the application of the absorber to the helicopter crashworthy seats, a non-linear five-degree-of-freedom model of the occupant and seat is established. The model includes five lumped masses which represent the head, viscera, upper torso, pelvis, and seat, respectively. The biodynamic response of the model under impact is simulated, and the results show the positive effect of the absorber on the shock mitigation.
      PubDate: 2022-04-01
       
  • Research on turbine blade squealer tip film holes arrangement and moving
           shroud

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      Abstract: Abstract In this paper, the performance of the turbine blade squealer tip with film cooling has been studied detailed to highlight the impact of the relative motion between the blade tip and the shroud. A high-pressure turbine has been employed to perform the numerical simulation. Boundary conditions are consistent with the operating conditions of the plane cascade experiment in a transonic wind tunnel. The validation of the turbulent model and mesh independence test has been conducted based on the experimental results. The distribution of blade tip heat transfer coefficient (HTC) and film cooling effectiveness has been used to evaluate the blade tip performance. Two different relative speeds and three different film holes arrangements have been adopted and studied to understand its influence. Results show that with relative motion and film cooling, the blade tip overall aerothermal characteristics remains unchanged. But the local HTC on several regions has significantly changed due to the complex interaction among the leakage flow, coolant, and relative motion. And the relative motion has a significant impact on the coolant, which redirects the coolant towards the pressure side of the blade and changes the coolant coverage inside the cavity.
      PubDate: 2022-03-28
       
  • Influence analysis of Waverider wake on the deflection rate of light

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      Abstract: Abstract In the future, aircraft will have both high flight speed and high stealth characteristics, and its detection will become a complex problem. However, the disturbance generated by the high-speed aircraft is evident in its tail flow field, which can be treated as a new feature. In this paper, the flow field of a Waverider at different attitudes and speeds is investigated. By observing the deflection of a 532 nm light beam incident in different directions, the relationship between deflection magnitude and the Waverider’s attitude is established. As a result, the light will deflect most ( \(8.82\times 10^{-5}\)  rad/s) when Waverider with a 6 Ma flying speed and 0 angle of attack. While the mini deflection occurs when Waverider flies at 4 Ma speed and with a \(10^\circ \) angle of attack. By analyzing different conditions, this paper points out that the traveling length of light and magnitude of the scalar gradient in wake most positive correlate to the light deflection angle. As speed goes up, the wake becomes narrow, but the scalar gradient rises so that the light deflects most at Ma6. As the incident of light goes closer to horizon direction, its traveling length in wake rises, the max deflection usually with a corresponding incident direction of \(20^{\circ }\) .
      PubDate: 2022-03-28
       
  • Reducing of hydraulic losses at the hydraulic drive under helping loads

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      Abstract: Abstract One of main trends at the development of aircraft hydraulic systems is increasing of nominal pressure. Increasing nominal pressure means intensification of tendency to contamination of electrohydraulic nozzle-flapper servo valve. It is expedient to use the usual spool-type hydraulic valve directly operated by the linear electric motor. It increases reliability and efficiency of the hydraulic drive and simplifies its design. The deficiency of this scheme is fluid flow through the spool valve of the second amplifying cascade at the helping external loads of an output link of a hydraulic cylinder. It leads to large hydraulic losses, increasing of temperature and decreasing a viscosity of hydraulic fluid. It is possible to eliminate these deficiencies by installation of the check valve which connects to a pressure line chamber of a hydraulic cylinder with pressure, exceeding one in a pressure line at the helping load. This design gives the following advantages: (1) at helping loads, the fluid temperature does not increase, because it does not flow through work windows of spool-type valves. It will allow to reduce the mass of heat exchangers of hydraulic system; (2) the discontinuity of the fluid flow at hydraulic cylinder chambers at the helping loads is excluded. The offered improvement was checked by simulation modeling of the second amplifying cascade of hydraulic drive using Matlab/Simulink software at various values and directions of external loads. The analysis of results of modeling showed that the scheme is efficient and meets requirements to power characteristics of the drive.
      PubDate: 2022-03-22
       
  • Estimation of the interrelation between the pilot state and the quality
           index of piloting

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      Abstract: Abstract This article presents the results of studies of the interrelation between the parameters that characterize the psychophysiological state of the pilot and the quality index of piloting. To estimate the pilot's state, signals of various natures were used: deviations of the aircraft control stick in the pitch and roll channels, electroencephalograms, determination of emotional states, and analysis of blinking parameters from video images of the face. As quality index of piloting, vertical and horizontal deviations from the glide path line during landing approaches on the flight simulator were considered. Signal spectral densities, frequency coherence functions, and principal component analysis were used to process experimental data, and convolutional deep learning neural networks were used to analyze video images. As a result of the research, stable correlations were found between the index of piloting accuracy and such characteristics of the operator as the frequency coherence functions of the control signals, the ratio of the first and second principal components of the electroencephalogram signals, the number of emotional states, and the number of blinks. This newly found correlation between data of different nature is to be useful for pilot interface design.
      PubDate: 2022-03-22
       
  • Recent developments of blended wing body aircraft: experimental, numerical
           and theoretical approaches

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      Abstract: Abstract Blended wing body (BWB) is a new design in which both the fuselage and the wings form the lifting surface of the body. Due to this design, the aerodynamic performance of the aircraft is enhanced as a result there is reduction in noise and fuel consumption. The major two drawbacks of this design are the handling and the complex design. Due to these issues, this design cannot be used predominantly in the aircraft industry. This paper gives a holistic review of various experimental, numerical, and theoretical studies done on the topic along with the basic analysis and study along various recent developments like geometric alterations such as canard or gurney flaps. The studies done in implementing the advantages of BWB in UAVs and under water bodies are also mentioned in this review. The BWB is a new revolutionary concept that can find its way into the modern aircraft design, but it has certain limitations that need to be addressed before using this design commercially or in military aircraft. It is likely that the information acquired in this paper could be useful to the future BWB aircraft design and study along with its various geometric alterations and uses.
      PubDate: 2022-03-07
      DOI: 10.1007/s42401-022-00133-1
       
  • A brief review on in-orbit refueling projects and critical techniques

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      Abstract: Abstract At present more and more interest is aroused by creation of spacecraft and satellites servicing in orbit. This is due to both the increasing amount of space debris in orbit and the high cost of developing spacecraft to replace those whose service life has come to an end. The implementation of such missions requires the presence of refueling elements on board the service vehicle. The purpose of the article is to analyze the ways and constructive elements of in-orbit refueling. A brief review of existing projects of in-orbit pre-fueling is carried out. The design features of refueling methods are reviewed. Based on the results of the analysis, a conclusion is made about the structural elements required for refueling the modules of the universal space platform demonstrator.
      PubDate: 2022-03-04
      DOI: 10.1007/s42401-022-00132-2
       
  • The research on intelligent cooperative combat of UAV cluster with
           multi-agent reinforcement learning

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      Abstract: Abstract With the rapid development of computer hardware and intelligent technology, the intelligent combat of unmanned aerial vehicle (UAV) cluster will become the main battle mode in the future battlefield. The UAV cluster as a multi-agent system (MAS), the traditional single-agent reinforcement learning (SARL) algorithm is no longer applicable. To truly achieve autonomous and cooperative combat of the UAV cluster, the multi-agent reinforcement learning (MARL) algorithm has become a research hotspot. Considering that the current UAV cluster combat is still in the program control stage, the fully autonomous and intelligent cooperative combat has not been realized. To realize the autonomous planning of the UAV cluster according to the changing environment and cooperate with each other to complete the combat goal, we propose a new MARL framework which adopts the policy of centralized training with decentralized execution, and uses actor-critic network to select the execution action and make the corresponding evaluation. By improving the structure of the learning network and refining the reward mechanism, the new algorithm can further optimize the training results and greatly improve the operation security. Compared with the original multi-agent deep deterministic policy gradient (MADDPG) algorithm, the ability of cluster cooperative operation gets effectively enhanced.
      PubDate: 2022-03-01
      DOI: 10.1007/s42401-021-00105-x
       
  • Three-dimensional path-following adaptive control of stratospheric airship
           based on improved chemical reaction optimization algorithm

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      Abstract: Abstract Chemical reaction optimization algorithm (CRO) is an intelligent heuristic evolutionary algorithm suitable for multi-objective optimization problems. In this paper, an adaptive PID controller based on classified-disturbance chemical reaction optimization (CDCRO) algorithm is proposed to realize the control of multiple-input multiple-output (MIMO) nonlinear systems. First, for the multi-channel PID control, an expanded ITSE function (mITSE(x)) is designed as the objective function of the optimization algorithm. Then, in difference from the classic CRO algorithm, the information between population individuals is taken into consideration, and an individual similarity function is introduced to classify the population for the purpose of reducing inefficient evolution and speeding up the global optimization. In addition, an elite retention strategy is adopted and the randomness of operators is improved. Furthermore, to improve the robustness of the system, an adaptive intelligent control system has been designed by adding an adaptive feedback link and establishing the adaptive rule. Finally, simulation results illustrate the effectiveness and robustness of the proposed intelligent control approach, and comparing results indicates that the CDCRO-PID controller has better performance against other optimization algorithms.
      PubDate: 2022-03-01
      DOI: 10.1007/s42401-021-00091-0
       
  • Spatial interpolation methods for virtual rotating array beamforming with
           arbitrary microphone configurations

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      Abstract: Abstract Virtual rotating array (VRA) beamforming is a robust technique in the identification of rotating sound sources in frequency-domain. Under normal circumstances, the configuration of microphone array is established in ring geometry centred around the rotating axis. Two interpolation methods for arbitrary microphone configurations are proposed by Jekosch and Sarradj (Acoustics, 2020). One is to construct a mesh between all stationary microphones using Delaunay-triangulation, another one is a meshless technique based on radial basis function. However, whether other spatial interpolation methods are available in VRA beamforming with arbitrary microphone configurations is still unclear. This paper adds several new spatial interpolation methods in VRA beamforming and detailedly compares the performances of these interpolation methods in simulations. The simulating results demonstrated that all these interpolation methods are successfully applied in VRA beamforming with arbitrary microphone configurations. Inverse distance weighting interpolation method owns the best performance in rotating sound source localization. In addition, all these interpolation methods have poor spectrum construction capability and sound source strength precision.
      PubDate: 2022-03-01
      DOI: 10.1007/s42401-021-00117-7
       
  • Concept of application of water electrolysis propulsion system as a
           component of a universal space platform for asteroid exploration mission

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      Abstract: Abstract The article presents the concept of a universal space platform with a propulsion system based on water electrolysis. The spacecraft based on the platform is used for an asteroid research mission. The mission task is to extract water from the target asteroid and refuel the spacecraft. The requirements for such a performance of a universal space platform are proposed. The advantages and disadvantages of using such propulsion systems in small spacecraft are highlighted.
      PubDate: 2022-03-01
      DOI: 10.1007/s42401-021-00110-0
       
  • Design of thin orthotropic panels according to the postbuckling state
           under combined loading taking into account uniform heating

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      Abstract: Abstract The design problem of thin composite panels with possible postbuckling and uniform heating is examined. The panels have an orthotropic structure and boundary conditions correspond to hinge support. It is assumed that panels are loaded with biaxial compression and shear. Based on load-bearing panels design by postbuckling state panels, a minimal thickness definition method using geometrically nonlinear correlations is suggested in this paper. To explain this method, examples of composite panels design with uniaxial compression are provided in this paper. It is shown that for load-bearing panels optimal thickness definition based on stability conditions correlations are generally quadratic equations but for design based on postbuckling state defining expressions are cubic equations. Tsai criterion for monolayer is used in this work for multilayer package critical state definition in terms of strength conditions for combined loading case. Examples of orthotropic panels design methods based on postbuckling state with longitudinal compression and shear considering uniform heating are shown. Maximum-stress theory is used in panels design by static strength support conditions. For the option of creating panels taking into account the resource requirements, it is proposed to use the Tsai criterion taking into account the normal transverse and tangential stresses of the monolayer.
      PubDate: 2022-02-01
      DOI: 10.1007/s42401-021-00129-3
       
  • Influence of control system algorithms on the maneuvering characteristics
           of the aircraft

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      Abstract: Abstract The paper presents the results of a study of the flight dynamics of a hypothetical maneuverable airplane, the shortcomings of the stability and controllability characteristics of which are compensated by algorithms of the system of improving stability and controllability by introducing a complex border of the permissible angle of attack depending on the flight mode. The research was based on a mathematical model of the airplane as a material point, taking into account the restrictions on altitude and flight speed, g-load, angle of attack, as well as the rate of change of g-load and roll. The purpose of the research is to establish the effect of the operation of the specified control system algorithms on the nature and area of safe execution of the "coup-type" maneuver. As a result of the research, it was found that the functioning of special algorithms of the electric remote-control system, leads to the emergence of areas of the operational range of altitudes and flight speeds, in which there is a significant and sharp deterioration of the maneuverability of the aircraft. Consequently, any "improvement" of the aircraft's flight performance using an automatic control system requires an assessment of the effect of these changes on the aircraft's maneuverability in all possible flight modes.
      PubDate: 2022-01-16
      DOI: 10.1007/s42401-021-00124-8
       
 
JournalTOCs
School of Mathematical and Computer Sciences
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