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Robust ∞ control for switched systems with input delays: A sojourn-probability-dependent method

Information Sciences 2014年 283卷 22-35页

作者： Tian, Engang Wong, W.K. Yue, Dong School of Electrical and Automation Engineering Nanjing Normal University Nanjing Jiangsu China Institute of Textile and Clothing Hong Kong Polytechnic University Hong Kong Hong Kong Department of Control Science and Engineering Huazhong University of Science and Technology Wuhan China

In this paper, a sojourn-probability-dependent method is proposed to investigate the robust ∞ control for a class of switched systems with input delays. The considered system has the following characteristics: (1) it is a switched system consisting of a set of subsystems;(2) sojourn probabilities (i.e. the probability of switched systems staying in each subsystem) are assumed to be known (or partly known) a prior;and (3) there are input delays and parameter uncertainties in each subsystem. By using the sojourn probability information, a new type of switched system model is built. By using the Lyapunov functional method, the robust mean square stability criteria are obtained for switched systems under two conditions: (A) all sojourn probabilities of the subsystems are known;(B) only partly sojourn probabilities are known. Then the robust ∞ controller feedback gains are derived by using the cone complement linearization method. An inverted pendulum system and a numerical example are given to demonstrate the effectiveness and applicability of the proposed method. © 2014 Elsevier Inc. All rights reserved.

关键词： Probability

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Scheduling of Electric Vehicle Charging Request and Power Allocation at Charging Stations with Renewable Energy 33

Scheduling of Electric Vehicle Charging Request and Power Al...

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第三十三届中国控制会议

作者： LI Jingwei YANG Bo XU Yang CHEN Cailian GUAN Xinping ZHANG Weidong Department of Automation Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing Ministry of Education of China Department of Electrical Engineering and Automation Shanghai Jiao Tong University

ISBN: (纸本)9781479947249

Smart grid, a concept proposed in 2003, is now attracting more and more attention because of its ability to integrate intensive information and renewable energy generating infrastructures. This paper focuses on scheduling charging process between multiple electric vehicles and charging stations in smart grid with renewable energy and storage devices. From the perspective of the whole system, the goal of minimizing the time average electricity cost with time-varying electricity price can be reached in this paper. With the participation of storage devices, charging-station-private renewable generation and electric vehicles power demands, we mathematically formulate a stochastic optimal problem and address it by employing Lyapunov optimization methods. Through mathematical derivation, stability of storage devices is achieved. Meanwhile, the upper bound for time average electricity cost can be calculated. The feature of our research is the independence on stochastic distribution of demand and renewable generation. Simulation results show the convergence of storage device state of charging（SOC） and illustrate the efficiency and performance of our algorithm.

关键词： Smart grid EV guidance renewable generation energy storage device Lyapunov optimization

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Interval type-2 fuzzy-model-based control design for time-delay systems under imperfect premise matching

Interval type-2 fuzzy-model-based control design for time-de...

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IEEE International Conference on Fuzzy Systems (FUZZ-IEEE)

作者： Yuandi Li H. K. Lam Lixian Zhang Hongyi Li Fucai Liu Shun-Hung Tsai Department of Informatics King's College London United Kingdom Institute of Electrical Engineering Yanshan University Qinhuangdao China Research Center of Intelligent Control and Systems Harbin Institute of Technology Harbin China College of Engineering Bohai University Jinzhou China Graduate Institute of Automation Technology National Taipei University of Technology Taipei Taiwan

In this paper, the problems of stabilization for interval type-2 fuzzy systems with time-varying delay and parameter uncertainties are investigated. The objective is to design an interval type-2 fuzzy controller such that the closed-loop control system is asymptotically stable. The conditions for the existence of such a controller are delay dependent and membership function dependent in terms of linear matrix inequalities (LMIs). Based on a basic lemma, we formulate and solve the problem with more flexibility due to imperfect premise matching that the number of rules and premise membership functions are not necessary the same between the interval type-2 fuzzy model and interval type-2 fuzzy controller. A systematic approach making use of the information embedded in the lower and upper membership functions is employed to facilitate the stability analysis. A numerical example indicates the effectiveness of the derived results.

关键词： Gold

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Using the theories of finite automata and formal languages to determine observability of switched Boolean control networks

Using the theories of finite automata and formal languages t...

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IEEE Annual Conference on Decision and control

作者： Kuize Zhang Lijun Zhang Lihua Xie Zhe Jiang College of Automation Harbin Engineering University Harbin 150001 PR China School of Marine Technology Northwestern Polytechnical University Xi'an 710072 PR China School of Electrical and Electronic Engineering Nanyang Technological University Singapore 639798 Singapore Key Laboratory of System and Control Chinese Academy of Sciences Beijing 100190 PR China

ISBN: (纸本)9781479978878

In this paper, how to determine the observability of switched Boolean control networks (SBCNs) is investigated. First, a new concept of weighted pair graph for an SBCN is defined. Second, the weighted pair graph is used to transform an SBCN into a deterministic finite automaton (DFA). Lastly, the observability of the SBCN is tested by testing the completeness of the DFA. Based on these results, algorithms for determining the observability and the initial state are designed.

关键词： Observability Automata Switches Formal languages Transforms controllability

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Modified nanoporous membranes on centrifugal microfluidic platforms for detecting heavy metal ions

Modified nanoporous membranes on centrifugal microfluidic pl...

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作者： Chang, H.-C. Chen, Y.-H. Lo, A.-T. Hung, S.-S. Lin, S.-L. Chang, I.-N. Lin, J.-C. Department of Automatic Control Engineering Feng Chia University Taichung Taiwan Program in Electrical and Communications Engineering Feng Chia University Taichung Taiwan

The modified nanoporous membranes on centrifugal microfluidic platforms are developed for detecting heavy metal ions with high selectivity. The nanomaterials of polyrhodanine, activated alumina and activated carbon are deposited on nanoporous anodic aluminium oxide (AAO) membranes for enhancing filtration to remove ions of lead (Pb(II)), arsenic (As(III)) and cadmium (Cd(II)) from aqueous solution. By detecting chemiluminescence (CL) reaction, the concentrations of heavy metal ions can be obtained. A pneumatic-and-centrifugal microfluidic detection system was used to perform microfluid separation and CL detection for measuring selected ions concentration. The removal efficiency of 92, 82 and 78% were observed for Pb(II), As(III) and Cd(II) ions, respectively. The removal rate is performed up to 70% for mixed ions filtration by a sequence of multi-modified AAO membranes. The modified nanofiltration films on microfluid platform have potential applications in removing heavy metal ions from water, soil, food and drug. © 2014 W. S. Maney & Son Ltd.

关键词： Metal ions

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Identification of switched Hammerstein model for radar antenna servo system using the RLS-PSO algorithm

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Journal of Computational Information Systems 2014年第3期10卷 1077-1084页

作者： Zhang, Qian Wang, Qunjing Li, Guoli Liu, Guohua Department of Electrical Engineering and Automation Anhui University Hefei 230039 China National Engineering Laboratory of Energy-Saving Motor and Control Technology Anhui University Hefei 230039 China Engineering Research Center of Power Quality Ministry of Education Anhui University Hefei 230039 China Anhui Province Laboratory of Electrical Economize and Safety Anhui University Hefei 230039 China

This paper proposed a switched Hammerstein model to describe the servo system of radar antenna novelly. Four subsystems, which contain two linear systems and two nonlinear Hammerstein systems, are combined to describe the object in different work conditions by different switching positions. The algorithm RLS-PSO (Recursive Least Squares Method-Particle swarm optimization) is proposed to solve the problem of identification and parameter estimation. The results show with comparison that the switched Hammerstein model structure can be used to describe the radar antenna servo system very well and demonstrate the effectiveness of the RLS-PSO algorithm. © 2014 Binary Information Press.

关键词： Radar antennas

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Consensus control and feedback graph co-design for MIMO discrete-time multi-agent systems

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Journal of control and Decision 2014年第1期1卷 18-33页

作者： Guoxiang Gu Fei Liu Xiang Chen Department of Electrical and Computer Engineering Louisiana State UniversityBaton RougeLAUSA Key Laboratory of Advanced Process Control for Light Industry(Ministry of Education)China Institute of AutomationJiangnan UnniversityWuxiP.R.China Department of Electrical and Computer Engineering University of WindsorWindsorCanada

This paper studies consensus control for multi-input/multi-output(MIMO)discrete-time multi-agent systems(MASs).It makes use of the novel idea of resource allocation in designing both the communication graph and feedback *** weakest consensusability condition is obtained for MASs over both directed and undirected graphs,which extends the existing results to MIMO discrete-time *** synthesis procedures are also *** work demonstrates the importance of the graph and controller co-design based on resource allocation for MIMO discrete-time MASs.

关键词： consensus control gain margin multi-agent systems

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Fuzzy Attitude Tracking control for Mars Entry Vehicles with External Disturbance 33

Fuzzy Attitude Tracking Control for Mars Entry Vehicles with...

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第三十三届中国控制会议

作者： JIANG Bo WU Huai-Ning GUO Lei Science and Technology on Aircraft Control Laboratory School of Automation Science and Electrical Engineering Beihang University (Beijing University of Aeronautics and Astronautics)

ISBN: (纸本)9781479947249

In this paper,a fuzzy tracking controller is designed for Mars entry vehicles during the entry phase in consideration of external *** original nonlinear attitude dynamics is divided into two subsystems based on the concept of time-scale *** inversion method is employed for the slow kinematic subsystem to give the angular velocity command by taking the attitude command as its input,which is generated by the guidance system of the entry *** T-S fuzzy model based control method is applied for the fast kinetic subsystem by taking angular velocity command as its input to derive the desired control torques in the presence of external ***,the simulation results on the Mars entry attitude tracking control are given to demonstrate the effectiveness of the developed method.

关键词： Mars entry phase,Attitude tracking control,Takagi-Sugeno(T-S) fuzzy model,Time-scale decomposition

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Ultrasound Attenuation Characteristics in Oil-water Two-phase Flow

Ultrasound Attenuation Characteristics in Oil-water Two-phas...

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IEEE International Instrumentation and Measurement Technology Conference

作者： Qian Su Chao Tan Feng Dong Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin 300072 China

ISBN: (纸本)9781479961153

Accurate measurement of multiphase flow parameter has significance on the optimization of production process and equipment. Ultrasonic measurement technology has potential applications in two-phase flow measurement. In order to understand the ultrasonic testing mechanism, the ultrasound attenuation characteristics in the oil-water two-phase flow are numerically investigated. Two-dimension models of ultrasonic sensor are set up based on the finite element analysis method. Through calculation of ultrasound pressure distribution in oil-water two-phase flow, the effects of different oil fractions on ultrasound attenuation in oil droplet structure and stratified structure are simulated. Simulation results show that phase distribution and fraction have direct influence on the ultrasound attenuation.

关键词： two-phase flow phase fraction testing mechanism ultrasound attenuation finite element method

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Real-time coplanar NURBS curve fitting and interpolation for 6-DOF robot arm

Real-time coplanar NURBS curve fitting and interpolation for...

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International Conference on Advanced Robotics and Intelligent Systems (ARIS)

作者： Chin-Sheng Chen Shih-Kang Chen Cheng-Hsien Lai Graduate Institute of Automation Technology National Taipei University of Technology Taipei Taiwan Graduate Institute of Mechanical and Electrical Engineering National Taipei University of Technology Taipei Taiwan Robotic Control Department Precision Machinery Research Development Center (PMC) Taichung Taiwan

ISBN: (纸本)9781479918522

This paper proposes a real-time coplanar Non-Uniform Rational B-Spline (NURBS) curves fitting and interpolation for 6-DOF robot arm to improve the fitting and interpolation quality, and reduce the calculation effort. The process consists of (1) reading discrete points, (2) discrete points extraction, (3) curve fitting, (4) interpolation, and (5) inverse kinematics transformation. According to the simulation and experimental results, the proposed approach certainly raises the fitting and interpolation quality, and the efficiency of calculation.

关键词： Splines (mathematics) Surface topography Surface reconstruction Robots Kinematics Joints Interpolation

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