for Journals by Title or ISSN
for Articles by Keywords
help
Followed Journals
Journal you Follow: 0
 
Sign Up to follow journals, search in your chosen journals and, optionally, receive Email Alerts when new issues of your Followed Jurnals are published.
Already have an account? Sign In to see the journals you follow.
International Journal of Automation and Power Engineering    Follow    
  This is an Open Access Journal Open Access journal
     ISSN (Print) 2161-6442 - ISSN (Online) 2161-5055
     Published by Science and Engineering Publishing Company Homepage  [46 journals]
  • RNUC Technology of MOS Resistor Array Based on CUDA
    • Abstract: RNUC Technology of MOS Resistor Array Based on CUDA
      Pages 67-71
      Author Junping YaoXinshe LiChunwei YangLitao Wan
      The non-uniformity of MOS resistor array has been always restricting its further application in the infrared image projection field. The non-uniformity correction (NUC) technology of MOS resistor array is introduced; the experiment is designed to analyze the real time of data processing; and the real-time non-uniformity correction (RNUC) technology based on CUDA is proposed to solve the problem of massive data and high parallelization calculation in RNUC process. The results show that the RNUC technology based on CUDA greatly improves the correction efficiency, which lays a solid foundation for further application of large-scale resistor array in the infrared image projection field.
      PubDate: 2014-01
       
  • Evaluation of Kinetics and Reaction Mechanism of Partial Oxidation of
           Glycerol
    • Abstract: Evaluation of Kinetics and Reaction Mechanism of Partial Oxidation of Glycerol
      Pages 72-74
      Author Juan Carlos Beltrán PrietoRoman SlavíkKarel KolomazníkJiři Pech
      The partial oxidation of glycerol on platinum electrodes in MnO2 solutions by electrochemical methods was performed by means of cyclic voltammetry and multiple pulse amperometry techniques. High Performance Liquid Chromatography was used for quantitative analysis to determine the concentration of products formed. The obtained data were used to evaluate the reaction mechanism and kinetic model. Laplace transformation was applied to obtain the set of equations that describes the variation of glycerol and products concentration un function of time.
      PubDate: 2014-01
       
  • Load Modes Variation in the Circuit Test Diagnosis
    • Abstract: Load Modes Variation in the Circuit Test Diagnosis
      Pages 23-27
      Author Nikolay V. KinshtNatalia N. Petrun'k
      The power sources (current sources and e.m.f.) commonly used as a testing influence on circuit in realization test diagnosis. A new way of the testing experiments organization with analog circuit is considered. It is mean the different test modes of the target circuit arise as a result of variations in wiring diagrams or numerical parameters of the connected passive elements. The problem of the circuit diagnosing with variation of load of the active multipole circuit with partly inaccessible nodes is analysed. Examples are given.
      PubDate: 2014-01
       
  • Energy-Efficient Scheduling for (m,k)-Firm Real-Time Control Systems
    • Abstract: Energy-Efficient Scheduling for (m,k)-Firm Real-Time Control Systems
      Pages 28-31
      Author Linwei Ni
      Energy consumption and Quality of Service (QoS) are two primary concerns in the development of today’s realtime control systems. To reduce energy consumption, most of the existing work use the critical speed as the lower bound in scaling the speed of executing real-time tasks/jobs. In this paper, the problem of reducing the energy consumption for real-time systems has been studied while meeting the QoS requirements. The QoS requirements are deterministically quantified with the (m, k)-constraints which require at least m out of any k consecutive jobs of a task meet their deadlines; then a comprehensive approach was proposed to reduce the overall energy consumption for real-time systems while satisfying the (m, k)-constraints. Our approach will reduce the speed of real-time jobs below the critical speed when necessary. The simulation results demonstrated that our proposed techniques outperforme previous research in overall and idle energy reduction.
      PubDate: 2014-01
       
  • Research of the Yaw Control System on Sail-assisted Ship
    • Abstract: Research of the Yaw Control System on Sail-assisted Ship
      Pages 34-40
      Author Li XuFan FengJunchen LiGuoGang Wan
      Wind energy, as a renewable and cleaner energy,has been received much more attention. The interference effect of wind on the yaw of sail-assisted ship has been considered in this article, and a study was undertook on yaw control of sail-assisted ship by using motion models of sail-assisted ship. In order to design stable yaw control system of sail-assisted ship, PID controller was used for a yaw controller, and some simulation research was carried out for the system under different wind conditions. The sail-assisted ship would not yaw with the influence of sea wind. And the sea resources were made use of effectively, to avoid the ship steering frequently under different wind conditions, further to maintain the stability of the yaw of sail-assisted ship.
      PubDate: 2014-01
       
  • The Optimizted Posture of Material Handing in Fabrication Workshop
    • Abstract: The Optimizted Posture of Material Handing in Fabrication Workshop
      Pages 32-36
      Author Tao Zon
      As an alternative approach to traditional ergonomics study, the modelling and simulating through manikin could help researchers to access the ergonomics constrain in craft shop actively. In current study, focus on typical scenario of semiconductor fabrication workshop, the posture of worker’s during material handing was simulated and the musculoskeletal loads on lumber and shoulder of manikin was predicted, especially on L4/L5 joint of lumber. Accodingly, the improved working posture and related paramaters was proposed according to regional anthropometry reference.
      PubDate: 2014-01
       
  • Design of Sampled Data Nonlinear Observers: Alternative Approaches in the
           Context of Observer Error Linearization
    • Abstract: Design of Sampled Data Nonlinear Observers: Alternative Approaches in the Context of Observer Error Linearization
      Pages 14-17
      Author Costas Kravari
      The present paper explores alternative design approaches for sampled data nonlinear observers in the context of the observer error linearization design method. After a brief necessary review of observer error linearization, two alternative time-discretization approaches are examined, one involving discretization at the beginning, and the other at the end. For the case of large sampling period, a sampled data observer involving inter-sample prediction is proposed.
      PubDate: 2014-01
       
  • Computation of Lightning Impulse Backflashover Outages Rates on High
           Voltage Transmission Lines
    • Abstract: Computation of Lightning Impulse Backflashover Outages Rates on High Voltage Transmission Lines
      Pages 18-22
      Author M. H. ShwehdiS. Raja Mohamma
      Lightning impulse has been one of the important problems for insulation design of power systems and it is still the main cause of outages of transmission and distribution lines. The lightning return-stroke current and the charge delivered by the stroke are the most important parameters to assess the severity of lightning strokes to power lines and apparatus. This paper presents the effects of many tower, ground parameters on the backfloshover voltage level. Also demonstrate the results used to determine the lightning backflashovers level on 230KV transmission lines utilized by Saudi Electric Company (SEC) in Saudi Arabia, using two well known approaches CIGRE, and the simplified method. The studies include lightning flashovers, backflash analysis, as dependent on the tower design parameters which is considered the main parameters that reduce the rate of lightning bachflashovers in the transmission lines. The study results can be applied to reduce the number lightning flashovers and therefore reduce the transmission lines outages
      PubDate: 2014-01
       
  • Very Short-Term Electric Load Forecasting Considering Climate and Temporal
           Variable
    • Abstract: Very Short-Term Electric Load Forecasting Considering Climate and Temporal Variable
      Pages 9-13
      Author Mario Orlando OliveiraOscar Eduardo PerroneOswaldo Hideo Ando JuniorJose Horacio ReversatGustavo Figueredo Casagrand
      The paper presents a very short-term electric load forecasting using climate and temporal variables for a thermoelectric power generation, located in Rio Grande do Sul, Brazil. The climatic variables used were, wind speed, air temperature and relative humidity combined into a single value called discomfort index, while the temporal variables consist of two coefficients created from actual values of electricity demand supplied by the thermoelectric power plant company. The projections presented error values of 3.38% and 4.39% for working days and 4.55% and 5.42% in non-working days.
      PubDate: 2014-01
       
  • Inspection of Uncertainty Effects on Structural Fault Diagnosing of
           Transmission Towers
    • Abstract: Inspection of Uncertainty Effects on Structural Fault Diagnosing of Transmission Towers
      Pages 1-8
      Author A. MojtahediGH. R. OstadiM. A. Lotfollahi Yaghi
      Structural damage detection in large-scaled three dimensional structures is essential for ensuring their safety in service. A robust structural damage detection method must consider the characteristics of the target structure and damage in the development stage. Many identification methods have been proposed and further verified based on experimental data. However, few papers are reported on comparative investigation of several output-only identification methods, especially based on measured signals from transmission towers. This work is an experimental investigation on a laboratory model of a transmission tower to develop the system identification methods using time series signal for long-term structural health monitoring purposes. In a comparative investigation of two different methods, the difficulties in implementing damage detection techniques for complex structures has been discussed. The efficiency of the techniques is validated by different damage scenarios foreseen on the physical model. The results show that the developed methods are suitable for damage classification, but the uncertainty effects in the dynamic system must be considered an important factor influencing successful classification.
      PubDate: 2014-01
       
  • An Efficient Multiple Fault Detection and Isolation Scheme for Discrete
           Event System
    • Abstract: An Efficient Multiple Fault Detection and Isolation Scheme for Discrete Event System
      Pages 41-48
      Author Eid M. Al-HajriHamdi A. Awa
      The malfunction of sensors, actuators, and erroneous actions of human operators can have some disastrous consequences in high risk systems especially if these systems have multiple faults that can lead to undesirable shutdowns and consequently a plant output reduction. This paper introduced a new scheme to detect and isolate multiple faults in complex discrete event systems. This scheme comprises a set of discrete rules and an inference engine. The former characterizes the dynamic behavior of a process that is modeled by a Petri net and the latter infers the consequent part of the fired rules. The consequent parts are aggregated and compared with the original Petri net model of the process for detecting multiple faults. The proposed inference engine follows the forward reasoning strategy that fires transitions from the initial marking until the final marking is reached. Industrial processes are employed for testing the soundness of the proposed scheme.
      PubDate: 2014-01
       
  • Nonlinear Feedback Control to Enhance Stable Performance of Micromachined
           Electrostatic Parallel Plate Actuators
    • Abstract: Nonlinear Feedback Control to Enhance Stable Performance of Micromachined Electrostatic Parallel Plate Actuators
      Pages 49-52
      Author Chong LiRobert N. DeanGeorge T. FlowersJohn Y. Hun
      MEMS parallel plate actuators on elastic suspensions are open loop stable over one third of their rest gap distance. To Increase the range of stable motion, a nonlinear feedback controller is proposed in this paper. Verification and error analysis are performed using MATLAB Simulink.
      PubDate: 2014-01
       
  • Monitoring System for Auxiliary Motors in Thermal-Power Plants
    • Abstract: Monitoring System for Auxiliary Motors in Thermal-Power Plants
      Pages 53-57
      Author Germano Lambert-TorresErik Leandro BonaldiLevy Ely de Lacerda de OliveiraFelipe dos Santos MoreiraLuiz Eduardo Borges da SilvaJonas Guedes Borges da Silv
      This paper presents a monitoring system for electric motors by current signature analysis technique. The main idea behind this technique is a comparison between the healthy motor signature and the motor signature under failure. Using the current signal only, it is possible to detect premature failures in electric part of the motor, but also in mechanical part of the motor, in the coupling, and in the load. The motor works in this case as a transducer for mechanical failures. This paper presents some results of the monitoring system at TermoPernambuco Power Plant.
      PubDate: 2014-01
       
  • A Sollin Algorithm Based Strategy in Enabling Power System Island
           Recognition with Distributed Generations
    • Abstract: A Sollin Algorithm Based Strategy in Enabling Power System Island Recognition with Distributed Generations
      Pages 58-62
      Author Lingzhu ZhangLin L
      Considering a system contains DGs and loads which are connected to the distribution network using feeders, which can be simplified according to the concept of T node. Then based on bus-nodes and feeders, a minimum tree can be formed. Finally in the premise of guarantee that the power balances in the island, the loads can be added to the tree in ascending order based on their weights. In terms of separating isolated islands, Sollin algorithm has been involved due to its fast convergence. The experimental results indicated that the proposed strategy is suitable for the distribution network with various voltages, moreover, it works perfectly for the distribution network with same voltage.
      PubDate: 2014-01
       
  • Node-disjoint Parallel Paths Routing in Wireless Network Control Systems
    • Abstract: Node-disjoint Parallel Paths Routing in Wireless Network Control Systems
      Pages 63-66
      Author Jun XuChengcheng GuoChengyi L
      In wireless network control systems (WiNCS), sensors, controllers, and actuators communicate with each other through wireless network. Stability is important for WiNCS, but the wireless network always induces packet losses and delays, and therefore affecting the stability. In this paper, it was first demonstrated that transmitting a packet through two node-disjoint paths (node-disjoint parallel paths routing) can improve the average end-to-end reliability; then a distributed routing algorithm was proposed based on the BFS labels, by which each source node can send a packet to the destination through two node-disjoint paths. The time complexity of the routing algorithm executed on node v is O( N(v) ), where N(v) represents the neighbors of node v.
      PubDate: 2014-01
       
 
 
JournalTOCs
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Email: journaltocs@hw.ac.uk
Tel: +00 44 (0)131 4513762
Fax: +00 44 (0)131 4513327
 
About JournalTOCs
API
Help
News (blog, publications)
JournalTOCs on Twitter   JournalTOCs on Facebook

JournalTOCs © 2009-2014