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作者： Zhou, Keliang Wang, Danwei Zhang, Bin Wang, Yigang School of Electrical Engineering Wind Generation Research Center Southeast University Nanjing 210096 China Centre for Intelligent Machines Division of Control and Instrumentation Nanyang Technological University Singapore 639798 Singapore School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA 30332 United States

Repetitive control (RC) is found to be a high-performance control scheme for constant-voltage constant-frequency (CVCF) pulsewidth-modulated (PWM) converters to eliminate output total harmonic distortion. In this paper, a dual-mode-structure RC (DMRC) is proposed to further improve the control performance of RC. The proposed DMRC controller comprises of two paralleled periodic signal generators: an odd-harmonic one and an even-harmonic one. Without additional complexity and loss of tracking accuracy, DMRC can achieve a faster error convergence rate than the conventional RC does. Moreover, the tracking accuracy of DMRC is higher than that of odd-harmonic RC. In the presence of nonlinear load disturbances and parameter uncertainties, an application example of a DMRC-controlled single-phase PWM inverter is provided to evaluate the proposed DMRC scheme. Systematical experimental results show the effectiveness and superior advantages of the DMRC approach. © 2009 IEEE.

关键词： controllers

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Decoupling-based reconfigurable control of linear systems after actuator faults

Decoupling-based reconfigurable control of linear systems af...

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European control Conference (ECC)

作者： J. H. Richter S. Weiland W. P. M. H. Heemels J. Lunze Institute of Automation and Computer Control Ruhr-Universität Bochum Bochum Germany Electrical Engineering TU Eindhoven Eindhoven The Netherlands Mechanical Engineering TU Eindhoven Eindhoven The Netherlands

In this paper, we provide the complete solution to the reconfigurable control problem after actuator faults in linear dynamical systems by means of disturbance decoupling approaches. The recovery of the closed-loop internal stability and the exact and approximate recovery of nominal tracking and performance are our main reconfiguration goals. We state necessary and sufficient conditions for the solvability of these problems. The approximate approach broadens the scope of potential applications. A thermofluid process is used to illustrate the exact and approximate methods.

关键词： Actuators Trajectory Closed loop systems Eigenvalues and eigenfunctions Linear systems Stability analysis

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Integration of a heterogeneous Low Level control in a multi-agent system for the manufacturing domain

Integration of a heterogeneous Low Level Control in a multi-...

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International Conference on Emerging Technologies and Factory automation (ETFA)

作者： Wilfried Lepuschitz Mathieu Vallée Munir Merdan Pavel Vrba Jürgen Resch Automation and Control Institute University of Technology Vienna Vienna Austria Institute of Computer Technology University of Technology Vienna Vienna Austria Rockwell Automation Research Center Prague Czech Republic COPA-DATA GmbH Salzburg Austria

ISBN: (纸本)9781424427277

Currently employed manufacturing systems are very often historically grown systems that can comprise several different technologies of control software. Linking these diverse control subsystems in the manufacturing domain is therefore of vital importance to ensure the system's functionality. In this paper we introduce an agent-based approach with agents that integrate a high level control layer and a low level control layer using a generic interface. Three use-cases are presented that illustrate the application of existing low level control solutions. The shown communication concept offers a feasible way for integrating these different types of low level control in a multi-agent system for the manufacturing domain. This allows to reduce the domain's complexity and to handle its heterogeneous nature.

关键词： Level control Multiagent systems Automatic control control systems IEC standards Manufacturing automation Application software Manufacturing systems computer aided manufacturing computer architecture

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$H_{\infty }$ Fuzzy control of Nonlinear Systems Under Unreliable Communication Links

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IEEE Transactions on Fuzzy Systems 2009年第2期17卷 265-278页

作者： Huijun Gao Yan Zhao Tongwen Chen Space Control and Inertial Technology Research Center Harbin Institute of Technology Harbin China Department of Electrical and Computer Engineering University of Alberta Edmonton AB Canada

This paper investigates the problem of H infin fuzzy control of nonlinear systems under unreliable communication links. The nonlinear plant is represented by a Takagi--Sugeno (T-S) fuzzy model, and the control strategy takes the form of parallel distributed compensation. The communication links existing between the plant and controller are assumed to be imperfect (that is, data packet dropouts occur intermittently, which appear typically in a network environment), and stochastic variables satisfying the Bernoulli random binary distribution are utilized to model the unreliable communication links. Attention is focused on the design of H infin controllers such that the closed-loop system is stochastically stable and preserves a guaranteed H infin performance. Two approaches are developed to solve this problem, based on the quadratic Lyapunov function and the basis-dependent Lyapunov function, respectively. Several examples are provided to illustrate the usefulness and applicability of the developed theoretical results.

关键词： Fuzzy systems Communication system control Fuzzy control control systems Nonlinear systems Lyapunov method Space technology Nonlinear control systems Fuzzy sets control design

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Study of Direction Probability and Algorithm of Improved Marriage in Honey Bees Optimization for Weapon Network System

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Defence Technology（防务技术） 2009年第2期5卷 152-157页

作者：杨晨光涂序彦陈杰 Systems Engineering Research Institute China State Shipbuilding Corporation Department of Automation School of Information Science and Technology Beijing Institute of Technology Ministry of Education of Key Laboratory of Complex System Intelligent Control and Decision Beijing Institute of Technology

To solve the weapon network system optimization problem against small raid objects with low attitude,the concept of direction probability and a new evaluation index system are *** calculating the whole damaging probability that changes with the defending angle,the efficiency of the whole weapon network system can be subtly *** such method,we can avoid the inconformity of the description obtained from the traditional index *** new indexes are also proposed,*** index,overlap index and cover index,which help manage the relationship among several *** normalizing the computation results with the Sigmoid function,the matching problem between the optimization algorithm and indexes is well ***,the algorithm of improved marriage in honey bees optimization that proposed in our previous work is applied to optimize the embattlement *** is carried out to show the efficiency of the proposed indexes and the optimization algorithm.

关键词：网络系统优化问题破坏概率算法改进核武器蜜蜂婚姻 Sigmoid函数

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controllability and stabilizability of linear switched systems

Controllability and stabilizability of linear switched syste...

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European control Conference (ECC)

作者： Zoltán Szabó József Bokor Gary Balas Computer and Automation Research Institute Hungarian Academy of Sciences Budapest Hungary Department of Aerospace Engineering and Mechanics University of Minnesota Minneapolis MN

The paper consider some special topics related to controllability of linear switching systems. Consequences of the normal controllability property and controllability under sampling are investigated. Both problems are related to the existence of a finite switching sequence with certain properties. It is shown that completely controllable linear switching systems, regardless to the sign of the allowed controls, contains a completely controllable linear time-varying system. The (closed-loop) stabilizability problem of controlled linear switched systems is also revisited. It is shown that the completely controllable sampled switching system can be robustly stabilized (against disturbances and model uncertainties) with suitable linear feedbacks and a periodic switching strategy.

关键词： Switches Switching systems controllability Vectors Switched systems Robustness

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Wavelets Hybrid Neural Network for Harmonic Sources Recognition with the V-I Characteristics

Wavelets Hybrid Neural Network for Harmonic Sources Recognit...

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International Conference on Innovative Computing, Information and control (ICICIC)

作者： Cong-Hui Huang Chia-Hung Lin Ting-Chia Ou Automation and Control Engineering Far East University Taiwan Electrical Engineering Kao Yuan University Taiwan Institute of Nuclear Energy Research Atomic Energy Council Taiwan

This paper presents a wavelets hybrid neural network (WHNN) for harmonic source recognition with voltage-current (V-I) characteristics. With time-domain technique, WHNN is applied in the application of harmonic sources classification. The proposed hybrid network is a two-subnetwork architecture, consisting of self-organizing feature lattice network (SOFL) and wavelet layer connected in cascade. The first layer Morlet wavelets, as an extractor, are used to extract the features from voltages and currents, and SOFL is employed to classify the various feature patterns including electronic devices, DC/AC motor, and electric arc furnaces (EAFs) in second layer. The computational results have show that With the time-domain technique, the effectiveness of the proposed model is demonstrated by tests. The recognition results of different harmonic sources show the computational efficiency and accurate recognition.

关键词： Neural networks Character recognition Voltage Time domain analysis Lattices Feature extraction AC motors Furnaces Testing Computational efficiency

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Output Tracking control for Autonomous Spacecraft Rendezvous

Output Tracking Control for Autonomous Spacecraft Rendezvous

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Joint 48th IEEE Conference on Decision and control and 28th Chinese control Conference

作者： Xuebo Yang Yuming Bo Yurong Liu Zhijian Ji Huijun Gao Space Control and Inertial Technology Research Center Harbin Institute of Technology School of Automation Nanjing University of Science and Technology the Department of Mathematics Yangzhou University School of Automation Engineering Qingdao University

This paper studies the problem of robust output tracking control for the homing phase of autonomous spacecraft *** on the C-W equations,parameter uncertainty and the output tracking requirement,a new relative dynamic model is developed,and a robust guaranteed cost output tracking control problem is ***,by a Lyapunov approach,the controller design is cast into a convex optimization problem subject to linear matrix inequalities(LMIs) *** the obtained controllers,the homing phase can be completed with a guaranteed cost,and the poles of the closed-loop system are located within a desire *** illustrative example is provided to show the effectiveness of the proposed controller design method.

关键词： Output Tracking control for Autonomous Spacecraft Rendezvous

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H∞ filter design for discrete delay systems: a new parameter-dependent approach

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International Journal of control 2009年第6期82卷 993-1005页

作者： Gao, Huijun hjgao@*** Meng, Xiangyu Chen, Tongwen Space Control and Inertial Technology Research Center Harbin Institute of Technology Harbin Heilongjiang China Department of Electrical and Computer Engineering University of Alberta Edmonton Alberta Canada

This article revisits the problem of H∞ filtering for discrete-time systems with a time-varying delay in the state and parameter uncertainties residing in a polytope. By utilising the polynomially parameter-dependent idea, a new filter design procedure is proposed, which formulates the existence of admissible robust H∞ filters into a set of linear matrix inequalities. These conditions are developed based on homogeneous polynomially parameter-dependent matrices of an arbitrary degree. As the degree grows, test of increasing precision is obtained providing less conservative filter designs. It is established that the results in the quadratic framework (that entail fixed matrices for the entire uncertainty domain), and the linearly parameter-dependent framework (that use linear convex combinations of matrices) are special cases of the proposed conditions for the zeroth degree and the first degree, respectively. Moreover, in addition to parameter dependence, the obtained conditions are also dependent on both the upper and lower bounds of the delay, which is obtained by using advanced techniques for achieving delay dependence. Several numerical examples are given to illustrate the effectiveness and advantage of the proposed filter design methods. [ABSTRACT FROM AUTHOR]

关键词： discrete-time systems H∞ filtering H∞ filtering linear matrix inequality (LMI) robust filtering time-delay systems

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Modeling and simulation of ship longitudinal motion

Modeling and simulation of ship longitudinal motion

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IEEE International Conference on Mechatronics and automation

作者： Hongli Chen Wenyan Liu Zhaoxin Zhong Postdoctoral Research Station of Control Science & Engineering Harbin Engineering of Technology Harbin China School of Astronautics Harbin Engineering of Technology Harbin China Automation Institute Harbin Engineering of Technology Harbin China

A method of studying hydrodynamic coefficient's nonlinear adaptive intelligent model was proposed based on ship motion in the sea all-weather situation. On the basis of microtome section theory, giving the hydrodynamic expression of different wave direction. Using optimal stopping method to optimize the radial basis function(RBF), through simulate and research get the real-time controlling model of ship longitudinal motion based on water pool experiment and the analysis of hydrodynamic coefficient of the 442T ship representative sea situation. This model can on-line compute hydrodynamic coefficients of ship longitudinal motion which has irrespective of frequency in any direction, speed and sea situation, so that we can get the on-line all-weather controlling model of ship longitudinal motion. Simulation results indicate that nonlinear coefficient model can be quickly and accurately established by using optimal stopping algorithm of radial basis function. research on intelligent model was done by different and columns methods: full-samples RBF model, which the maximal relative error is 9.1289% under the arbitrary ocean condition degree, navigating speed and navigate angle; the model's simulation characteristic get better after classified database, the maximal relatively error of which was 7.9467%; the maximal relatively error down to 4.7873 % because of gradient algorithm introduced and the mixed intelligent model was established in three class by classified data, the maximal relatively error of which was 0.9845%.

关键词： Marine vehicles Hydrodynamics Computational modeling Motion control Deductive databases Navigation Optimization methods Analytical models Optimal control Motion analysis

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