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作者： Zhang, Dengfeng Han, Xiaodong Wang, Hong Wang, Zhiquan School of Mechanical Engineering Nanjing University of Science and Technology Nanjing 210094 China Control Systems Centre University of Manchester M60 1QD Manchester United Kingdom Institute of Telecommunication Satellite China Academy of Space Technology Beijing 100094 China School of Automation Nanjing University of Science and Technology Nanjing 210094 China

This article presents the design of fault detection fuzzy observer with multiple performance constraints for a class of nonlinear system with Takagi-Sugeno fuzzy form. The multiobjective optimization and consistency analysis are applied to meeting the desirable transient behavior, steady output variance and H- index performance requirements. Thus, the rapidity of response to fault detection, robustness to noisy disturbances and sensitivity to faults are guaranteed simultaneously. One advantage of our design is that the determination of detection threshold makes full use of the information in the stage of observer design. Meanwhile, the multiple fuzzy Lyapunov function and the slack of variables are used for decreasing the conservatism of conventional single Lyapunove function method. Simulation results indicated the effectiveness of the proposed method. © 2011 Zhejiang University.

关键词： Fault detection

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Delay-independent stabilization of linear systems with multiple time-delays

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World Academy of science, engineering and Technology 2011年 51卷 1007-1011页

作者： He, Ping Lan, Heng-You Tan, Gong-Quan School of Automation and Electronic Information Sichuan University of Science and Engineering Zigong Sichuan 643000 China Department of Mathematics Sichuan University of Science and Engineering Zigong Sichuan 643000 China Research Institute of Information and Control Sichuan University of Science and Engineering Zigong Sichuan 643000 China

The multidelays linear control systems described by difference differential equations are often studied in modern control theory. In this paper, the delay-independent stabilization algebraic criteria and the theorem of delay-independent stabilization for linear systems with multiple time-delays are established by using the Lyapunov functional and the Riccati algebra matrix equation in the matrix theory. An illustrative example and the simulation result, show that the approach to linear systems with multiple time-delays is effective.

关键词： Matrix algebra

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Hand Movement Compensation for Patients with Parkinson's Disease Based on Polar Coordination System with Varied Origin

Hand Movement Compensation for Patients with Parkinson's Dis...

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2011 4th International Conference on Biomedical engineering and Informatics(第四届生物医学工程与信息学国际会议 BMEI 2011)

作者： Junzhong Zou Min Wang Bei Wang Jian Zhang Masatoshi Nakamura Department of Automation School of Information Science and Engineering East China University of Sci Department of Advanced System Control Engineering Saga University Saga 840-8502 Japan

Parkinson's disease (PD) is a common movement disorder caused from the neurological dysfunction in basal ganglia. Patients with Parkinson's disease have serious movement problems, such as movement disorders, tremor and rigidity. In this study, a new technique of hand movement compensation for patients with Parkinson's disease based on spiral drawing tasks was proposed. In order to extract the hand movement feature of patients with Parkinson's disease, the polar coordination system with varied origin was used to gain characteristic parameters more accurately. The compensation model was constructed by using the parameters obtained in spiral drawing tasks, and we also do simulation under this model to verify the effectiveness. The simulation results proved that the proposed compensation technique will be effective for assisting the movement of patients with Parkinson's disease.

关键词： Parkinson's disease Polar coordinate system with varied origin Spiral drawing task Hand motion control model Hand movement compensation

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Effectiveness Research of Deep Brain Stimulation Operation for Patients with Parkinson's Disease Based on Polar Coordination System with Varied Origin

Effectiveness Research of Deep Brain Stimulation Operation f...

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2011 4th International Conference on Biomedical engineering and Informatics(第四届生物医学工程与信息学国际会议 BMEI 2011)

作者： Junzhong Zou Bei Wang Jian Zhang Min Wang Masatoshi Nakamura Department of Automation School of Information Science and Engineering East China University of Sci Department of Advanced System Control Engineering Saga University Saga 840-8502 Japan

Parkinson's disease (PD) is a common disease of central nervous system among the elderly, and its complex symptoms bring up some difficulties for the clinical diagnosis. And Deep Brain Stimulation (DBS) is an effective treatment method for patients with Parkinson's disease. In this study, a method based on polar coordination system with varied origin was proposed to quantitatively evaluate the availability of DBS operation for patients with Parkinson's disease. Totally, seven patients with Parkinson's disease were participated in the spiral drawing experiment and their scores under Unified Parkinson's disease Rating Scale (UPDRS) were also recorded. According to the characteristics of hand movement in spiral drawing, a set of parameters were defined and calculated before and after DBS operation. Compared with the UPDRS scores, experimental results showed that this method of evaluation was consistent with the clinical diagnosis. The proposed method based on polar coordinate system with varied origin is effective in clinical diagnosis, and it provides a basis for quantitative evaluating the effectiveness of surgery and treatment.

关键词： Parkinson's disease Polar coordinate system with varied origin Deep brain stimulation operation Unified Parkinson's Disease Rating Scale Quantitative effectiveness evaluation

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Discrete-time adaptive iterative learning control for permanent magnet linear motor

Discrete-time adaptive iterative learning control for perman...

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IEEE Conference on Cybernetics and Intelligent Systems

作者： Shangtai Jin Zhongsheng Hou Ronghu Chi Yongqiang Li Advanced Control Systems Laboratory of School of Electronic and Information Engineering Beijing Jiaotong University BJTU Beijing China School of Automation and Electrical Engineering Qingdao University of Science and Technology Qingdao China

A discrete-time adaptive iterative learning control approach (DAILC) is presented for improving the permanent magnet linear motor velocity tracking performance. The learning gain can be updated iteratively along the learning axis and pointwisely along the time axis. When the initial states are random and the reference trajectory and disturbance are iteration-varying, the DAILC can achieve the pointwise convergence over a finite time interval asymptotically along the iterative learning axis. The theoretical analysis and simulation results further verify the effectiveness of the proposed approach.

关键词： Trajectory Permanent magnet motors Permanent magnets Force Target tracking Convergence Pi control

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Higher-order model-free adaptive control for a class of discrete-time SISO nonlinear systems

Higher-order model-free adaptive control for a class of disc...

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2011 China control and Decision Conference(2011中国控制与决策会议 CCDC)

作者： Shangtai Jin Zhongsheng Hou Ronghu Chi Advanced Control Systems Laboratory of School of Electronic and Information Engineering Beijing Jia Advanced ControlSystems Laboratory of School of Electronic and Information Engineering Beijing Jiaot School of Automation and Electrical Engineering Qingdao University of Science and Technology Qingd

A higher-order model-free adaptive control scheme is proposed for a class of discrete-time SISO nonlinear systems. The control scheme consists of the adaptive control law, parameter estimation law and reset mechanism. The controller design depends merely on the input and the output measurement data of the controlled plant. The proposed scheme can improve the control performance by using more error information derived from previous sampling time instants. The theoretical analysis shows that the proposed control scheme can guarantee the bounded input and bounded output (BIBO) stability. The simulation results further verify the effectiveness of the proposed control scheme.

关键词： Model-free adaptive control pseudo-partial derivative higher-order control scheme I/O data

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Invertibility of power systems components based-on nonlinear differential-algebraic-equation subsystems model

Invertibility of power systems components based-on nonlinear...

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Chinese control Conference (CCC)

作者： Qiang Zang Ying Zhou Kaifeng Zhang Xianzhong Dai School of Information and Control Engineering Nanjing University of Information Science & Technology 210044 China College of Automation Nanjing University of Posts and Telecommunications 210003 China Key Laboratory of Measurement and Control of CSE (School of Automation Southeast University) Ministry of Education Nanjing 210096 China

Components of power systems are essentially a special class of nonlinear differential-algebraic equations subsystems, whose index is one and interconnection is local measurable. In this paper, the invertibility of power systems components is discussed. Firstly, the definition of invertibility is presented. Secondly, a recursive algorithm is proposed to judge whether the controlled components are invertable. Then a physically feasible right inverse controller is constructed with which the controlled components are made linearization and decoupled. Finally, an excitation controller is designed for one synchronous generator within multi-machine power systems based on the proposed method in this paper.

关键词： Electronic mail Power system stability Educational institutions automation Mathematical model Equations

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Robust H∞ control for large-scale systems based on networks

Robust H∞ control for large-scale systems based on networks

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Chinese control Conference (CCC)

作者： Ying Zhou Fuwen Yang Chunxia Fan Qiang Zang College of Automation Nanjing University of Posts and Telecommunications 210003 China School of Information Science and Engineering East China University of Science and Technology Shanghai 200237 China School of Information and Control Engineering Nanjing University of Information Science & Technology 210044 China

Based on networks, a state feedback H ∞ controller design for a class of linear discrete-time large-scale system with both measurement data and control data missing simultaneously is considered in this paper. The large-scale system was modeled as interconnection of N linear discrete-time subsystems. The occurrence of measurement data and control data missing is assumed to be a Bernoulli distributed sequence with known probability. Sufficient conditions for the existence of a H ∞ controller are derived in terms of linear matrix inequality(LMI), such that the closed-loop system exponentially stable in the sense of mean square and a prescribed H ∞ performance is guaranteed. A numerical example is also provided to demonstrate the validity of the proposed design approach.

关键词： Large-scale systems Electronic mail control systems Information science Distributed databases Computer languages Robustness

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Practical and robust control for precision positioning systems

Practical and robust control for precision positioning syste...

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International Conference on Mechatronics (ICM)

作者： Shin-Horng Chong Kaiji Sato Department of Control Instrumentation & Automation Universiti Teknikal Malaysia Melaka Malacca Malaysia Interdisciplinary Graduate School of Science and Engineering Tokyo Institute of Technology Yokohama Japan

This paper presents a practical and improved practical controller for enhancing precision motion performance. For practical use, high motion control performance, ease of design and controller adjustment are desired. A nominal characteristic trajectory following (NCTF) control has been studied to realize high performance and ease of application. The NCTF controller consists of a nominal characteristic trajectory (NCT) which is the reference motion of a control system and determined from experimental open-loop time responses of the mechanism and a compensator which makes the motion of the controlled object to follow NCT. The controller parameters can be determined easily, without any given model parameters. In the present paper, the Acceleration-Reference - Continuous Motion (AR-CM) NCTF controller has been proposed and implemented. The AR-CM NCTF considers the acceleration reference for object motion as additional controller elements besides the velocity reference. The AR-CM NCTF controller provides the advantage of high overshoot reduction and disturbance reduction characteristics. This paper then highlights how robustness the controller in the precision positioning systems. The issues considered include (i) variation of mass object; (ii) variation of disturbance force such as coulomb and viscosity frictions. The design procedure of the AR-CM NCTF controller remains easy, practical and is independent of friction characteristics. Validation and implementation of the AR-CM NCTF controller with a mechanism with friction are carried out in order to confirm its effectiveness. The robustness of the AR-CM NCTF controller is examined by comparing its motion performance with the PDDO (PD + disturbance observer) controllers. The comparative experimental results illustrate the achievable performance of the AR-CM NCTF controller in positioning and tracking control and the higher robustness to plant parameter variations, as compared to the PDDO controllers.

关键词： Robustness PD control Acceleration Tracking

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Non-fragile H∞ Static Output Feedback control for Discrete-time Linear Systems

Non-fragile H∞ Static Output Feedback Control for Discrete-...

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2011 China control and Decision Conference(2011中国控制与决策会议 CCDC)

作者： Dawei Ding Xiaoli Li Yixin Yin Dexin Liu School of Automation and Electrical Engineering Key Laboratory of Advanced Control of Iron and Steel Process (Ministry of Education) University of Science and Technology Beijing Beijing 100083 China

This paper investigates the problem of non-fragile static output feedback control (SOF) design for discrete-time linear systems. Interval type of additive gain variations to reflect imprecision in controller implementation is considered. The non-fragile SOF controller design is firstly formulated as a robust convex problem. Then a deterministic algorithm and a randomized one are proposed to solve the obtained robust convex problem. These two algorithms complements each other. The deterministic algorithm is suitable for systems with low dimensions, while the randomized one is applicable for systems with high dimensions. In addition, the randomized algorithm can alleviate the conservatism of the deterministic one. Two examples are given to show the effectiveness of the proposed method.

关键词： Non-fragile Static output feedback Randomized algorithms.

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