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Stability analysis and design for discrete fuzzy systems with time-delay under imperfect premise matching

Journal of Information and Computational Science 2011年第13期8卷 2613-2622页

作者： Zhang, Zejian Huang, Xianlin Ban, Xiaojun Gao, X.Z. Center for Control Theory and Guidance Technology Harbin Institute of Technology Harbin 150001 China Department of Automation and Systems Technology School of Electrical Engineering Aalto University Otaniementie 17 00076 Aalto Finland

This paper is concerned with the issue of stability analysis and controller design for the discrete T-S fuzzy control system with time-delay under imperfect premise matching, in which the discrete T-S fuzzy time-delay model and fuzzy controller do not share the same membership functions. Some novel stability conditions including the information of membership functions of the discrete fuzzy time-delay model and controller are proposed. The new stability conditions are less conservativeness, and enhance the design flexibility by arbitrarily selecting membership functions for the fuzzy controller as well. Two numerical examples are presented to illustrate the less conservativeness and the effectiveness of the proposed results. 1548-7741/Copyright © 2011 Binary Information Press.

关键词： Fuzzy control

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Performance evaluation of GNSS aided predictive multihomed NEMO configurations

Performance evaluation of GNSS aided predictive multihomed N...

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2011 11th International Conference on ITS Telecommunications, ITST 2011

作者： Kovács, József Bokor, László Jeney, Gábor Systems and Control Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences H-1111 Kende u. Budapest 13-17 Hungary Budapest University of Technology and Economics Department of Telecommunications Magyar tudósok körúitja 2 Budapest H-1117 Hungary

ISBN: (纸本)9781612846712

In this document we show the evaluation of an already introduced handover management solution which can be used to provide ubiquitous connections and seamless Internet access. The new solution makes use of GNSS location information and previous records of network parameters. The method exploits the benefits of multihomed mobility configurations. Based on actual GNSS coordinates and previously recorded data, the system is able to predict handovers and to prepare itself for the appearance of networks. By implementing the proposed solution in a real-life multihomed test environment, handover latency is almost totally eliminated. © 2011 IEEE.

关键词： Mobile telecommunication systems

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Predictor-corrector guidance based on optimization

Predictor-corrector guidance based on optimization

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International Conference on Electronics, Communications and control (ICECC)

作者： Jingzhuang Han Lingyu Yang Zenghui Zhang Gongzhang Shen Science and Technology on Aircraft Control Laboratory Department of Automation Science and Electrical Engineering Beijing University of Aeronautics and Astronautics Beijing China

A new guidance algorithm based on a predictor-corrector approach is presented. The algorithm was designed for the re-entry guidance of the axisymmetric hypersonic vehicle. For this purpose, the angle-of-attack was considered to be the only input. We cast the re-entry guidance problem as a constrained optimization problem, then translated the constrained optimization problem into an unconstrained optimization problem using exterior point penalty function method and solved the unconstrained optimization problem using the steepest decent method. Altitude and range errors computed from the desired and achieved state at the terminal point were used to correct the angle-of-attack variables. Simulation results show that the algorithm developed in the paper is able to solve the re-entry guidance problem of the axisymmetric hypersonic vehicle and satisfies both terminal and path constraints.

关键词： Optimization Vehicles Prediction algorithms Trajectory Algorithm design and analysis Acceleration Navigation

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Hybrid Automata Modeling and Simulation for Single-Phase Shunt APF

Hybrid Automata Modeling and Simulation for Single-Phase Shu...

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2011 International Conference on Future Wireless Networks and Information systems (ICFWI 2011)

作者： Zhou Xue-song Tian Cheng-wen Ma You-jie Li Sheng-ming Liu Si-jia Department of Electrical Engineering Tianjin University of TechnologyTianjin Key Laboratory for Control Theory & Applications in Complicated Systems

Active power filter(APF) is a typical hybrid dynamic system. And the accuracy of its model directly affects the understanding of the movement laws and the design performance of the controller. According to hybrid automata modeling theory, partition of the state space in single-phase shunt APF movement is analyzed in this paper. Then the hybrid automaton model is established. The model can accurately reflect dynamical motion characteristics of the single-phase shunt APF. Simulation results illustrate the effectiveness and validity of the proposed mode.

关键词： hybrid automata,shunt APF,hybrid dynamic

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An Anti-Slip Predictive controller for a V-PRA Vehicle

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IFAC Proceedings Volumes 2011年第1期44卷 8415-8420页

作者： Carmen COCHIOR Robin De KEYSER Corneliu LAZAR Electrical Engineering Department Eindhoven University of Technology Eindhoven Netherlands EeSA-Department of Electrical energy Systems & Automation Ghent University Ghent Belgium Department of Automatic Control and Applied Informatics Faculty of Automatic Control and Computer Engineering Technical University Gh. Asachi Iasi Romania

Abstract In this paper an anti-slip predictive controller is designed and implemented in order to control the rear wheels of a V-PRA (Variable Powered Rear Axle) vehicle. The control algorithm is EPSAC, a Model based Predictive control (MPC) strategy. It uses explicitly a model of the system for the prediction of the future system output, in order to calculate the optimal control input which will bring the system to a required setpoint. The main goals of this predictive controller were setpoint trajectory following, disturbance rejection and maintain overall the stability of the V-PRA vehicle. Although the process is non-linear, being influenced by several parameters, linear discrete-time ARX models could be obtained based on system linearization around an operating point. An initial SISO controller was developed and tested, based on a Simulink model of the process. The control performances were tested successfully in presence of all kind of disturbances, denoting a robust controller.

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Agent-based traffic simulation and traffic signal timing optimization with GPU

Agent-based traffic simulation and traffic signal timing opt...

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International Conference on Intelligent Transportation

作者： Zhen Shen Kai Wang Fenghua Zhu State Key Laboratory of Intelligent Control and Management of Complex Systems Beijing Engineering Research Center of Intelligent Systems and Technology Institute of Automation Chinese Academy of Sciences (CAS) Beijing China Center of Military Computational Experiments and Parallel Systems Technology and College of Mechatronics Engineering and Automation National University of Defense Technology Changsha Hunan China

With the advantage of simulating the details of a transportation system, the “microsimulation” of a traffic system has long been a hot topic in the Intelligent Transportation systems (ITS) research. The Cellular Automata (CA) and the Multi-Agent System (MAS) modeling are two typical methods for the traffic microsimulation. However, the computing burden for the microsimulation and the optimization based on it is usually very heavy. In recent years the Graphics Processing Units (GPUs) have been applied successfully in many areas for parallel computing. Compared with the traditional CPU cluster, GPU has an obvious advantage of low cost of hardware and electricity consumption. In this paper we build an MAS model for a road network of four signalized intersections and we use a Genetic Algorithm (GA) to optimize the traffic signal timing with the objective of maximizing the number of the vehicles leaving the network in a given period of time. Both the simulation and the optimization are accelerated by GPU and a speedup by a factor of 195 is obtained. In the future we will extend the work to large scale road networks.

关键词： Graphics processing unit Vehicles Roads Optimization Computational modeling Genetic algorithms Timing

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Performance Metrics for Fault Detection and Isolation Filters

Performance Metrics for Fault Detection and Isolation Filter...

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2011 American control Conference (ACC)

作者： Rohit Pandita Jozsef Bokor Gary Balas Department of Aerospace Engineering and Mechanics University of Minnesota Minneapolis MN USA Department of AeroSpace Engineering and Mechanics University of Minnesota Minneapolis MN USA Systems and Control Laboratory Computer and Automation Research Institute of the Hungarian Academy of Sciences Budapest Hungary Systems and Control Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences (ATOMKI) Budapest Hungary

Fault detection and isolation (FDI) filters are typically synthesized for open-loop or closed-loop systems. The controller affects the FDI filter performance in the closed-loop. Performance metrics for FDI filters are proposed to assess filter performance and controller-filter interaction in the presence of uncertain dynamics in the closed-loop. The role of controller's robustness to plant uncertainty in FDI filter performance is examined.

关键词： Measurement Actuators Uncertainty Elevators Atmospheric modeling Transfer functions Mathematical model

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Hopf Bifurcation Analysis and Circuit Simulation of a New Chen Hyper-Chaotic System

Hopf Bifurcation Analysis and Circuit Simulation of a New Ch...

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International Workshop on Chaos-Fractals Theories and Applications (IWCFTA)

作者： Enzeng Dong Zhiling Lin Zaiping Chen Zengqiang Chen Tianjin Key Laboratory for Control Theory & Applications in Complicated Systems Tianjin University of Technology Tianjin China Department of Automation Nankai University Tianjin China

In this paper, a new hyper-chaotic system is generated by introducing a state variable into Chen system. This system contains five system parameters and two cross-product terms, can generate hyper-chaotic attractors with proper parameters regions. The theoretical analysis demonstrates that a Hopf bifurcation arises at zero equilibrium point. The basic dynamic properties of the proposed system are investigated via Lyapunov exponents spectrum and bifurcation diagram. Finally, the hyper-chaotic circuit is designed and realized by using the Multisim software, which confirms that the proposed system can be achieved.

关键词： Bifurcation Orbits Eigenvalues and eigenfunctions Chaotic communication Software

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Robust H_(infinity) Filter Design Using Frequency Gridding

Robust H_(infinity) Filter Design Using Frequency Gridding

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2011 American control Conference (ACC)

作者： Peter Seiler Balint Vanek Jozsef Bokor Gary J. Balas AeroSpace and Engineering Mechanics Department University of Minnesota USA Systems and Control Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences (ATOMKI) Hungary

This paper considers the design of robust H_(infinity) filters for continuous-time linear systems with uncertainties described by integral quadratic constraints (IQCs). The synthesis problem can be converted into an infinite-dimensional optimization with frequency dependent linear matrix inequality constraints on the filter and IQC multipliers. This optimization is approximated by a finite dimensional semidefinite program by restricting the filter to be a linear combination of basis functions and enforcing the constraints on a finite, but dense, grid of frequencies. A heuristic algorithm is described to quickly solve the resulting finite dimensional optimization. A small example is provided to demonstrate the proposed algorithm.

关键词： Uncertainty Robustness Optimization Equations Upper bound Algorithm design and analysis Approximation methods

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Robust filtering for networked systems with random transmission delays and packet dropouts

Robust filtering for networked systems with random transmiss...

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作者： Cai, Yunze Wang, Hua O. Tanaka, Kazuo Xu, Xiaoming Department of Automation Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing 800 Dongchuan Rd. Shanghai 200240 China Department of Mechanical Engineering Boston University Boston MA 02215 United States Department of Mechanical Systems and Intelligent Systems University of Electro-Communications Tokyo 182-8585 Japan Department of Automation Shanghai Jiao Tong University 800 Dongchuan Rd. Shanghai 200240 China University of Shanghai for Science and Technology 16 Jun Gong Rd. Shanghai 200093 China

ISBN: (纸本)9781457700804

This paper addresses a robust H∞ filtering problem for networked systems that are subject to both random transmission delays and packet dropouts. To start with, a data transmission model is established by employing random series with Bernoulli distributions. A sufficient condition for robust stability with H∞ constraints is derived for the filtering error system. The robust filter is designed in terms of the feasibility of a linear matrix inequality (LMI). The numerical examples are provided to show the effectiveness of the data transmission model and the proposed filtering method. © 2011 AACC American Automatic control Council.

关键词： Linear matrix inequalities

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