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检索条件"机构=Robotics and Control Laboratory Computer Engineering Division"

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Analysis of Two Robust Learning control Schemes in the Presence of Random Iteration-Varying Noise

Analysis of Two Robust Learning Control Schemes in the Prese...

引用

American control Conference

作者： Deyuan Meng Yingmin Jia Junping Du Fashan Yu Seventh Research Division and the Department of Systems and Control Beihang University (BUAA) Beijing 100191 China Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia School of Computer Science and Technology Beijing University of Posts and Telecommunications Beijing 100876 China School of Electrical Engineering and Automation Henan Polytechnic University Jiaozuo 454000 Henan China

ISBN: (纸本)9781424474264

This paper deals with the design problem of robust iterative learning control (ILC), in the presence of noise that is varying randomly from iteration to iteration. Two ILC schemes are considered: one adopts the previous iteration tracking error (PITE) and the other adopts the current iteration tracking error (CITE), in the updating law. For both schemes, the convergence results are obtained by using a frequency-domain approach, and a comparison between them is presented from the viewpoints of the convergence condition, robustness against plant uncertainty, and delay compensation. It shows that sufficient conditions can be derived to bound the tracking error and make its expectation monotonically convergent in the sense of L_(2)-norm, which work effectively with robustness for all admissible plant uncertainties. Furthermore, the sufficient conditions for both schemes can also be formulated in terms of two complementary functions, which do not depend on the delay time as well as the plant uncertainty and, thus, make them convenient to be checked and solved using the frequency-domain tools. Numerical simulations are included to illustrate the effectiveness of the two proposed ILC schemes.

关键词： Iterative learning control monotonic convergence previous iteration tracking error current iteration tracking error random iteration-varying noise delay compensation delay compensation monotone convergence iterative methods Iterative learning control follow error Scheme design problems Delay time Sufficient conditions learning control

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L_(2)-L_(infinity) Filter Design for Neutral Stochastic Time-Delay Systems

L_(2)-L_(infinity) Filter Design for Neutral Stochastic Time...

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2010 49th IEEE Conference on Decision and control

作者： Lin Li Yingmin Jia Junping Du Fashan Yu Seventh Research Division and the Department of Systems and Control Beihang University (BUAA) Beijing 100191 China Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia School of Computer Science and Technology Beijing University of Posts and Telecommunications Beijing 100876 China School of Electrical Engineering and Automation Henan Polytechnic University Jiaozuo 454000 Henan China

ISBN: (纸本)9781424477456

This paper is concerned with the problem of L_(2)-L_(infinity) filtering for a class of neutral stochastic systems with both discrete and distributed time-varying delays. The purpose is focusd on the design of a full order filter such that the resulting filtering error system is stochastically asymptotically stable in the mean square with a prescribed L_(2)-L_(infinity) disturbance attenuation level satisfied. By employing Lyapunov functional and stochastic stability theory, a delay-dependent sufficient condition for the existence of such a filter is obtained in terms of linear matrix inequalities (LMIs). The desired filter can be obtained by solving two LMIs.

关键词： Stochastic delay systems Filters mean square filter design stochastic systems error system stability theory Delay systems Filtration

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Kalman filtering with multiple nonlinear-linear mixing state constraints

Kalman filtering with multiple nonlinear-linear mixing state...

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IEEE Conference on Decision and control

作者： X. Fu Y. Jia J. Du F. Yu Seventh Research Division and the Department of Systems and Control Beihang University Beijing China Beihang University Beijing CN Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia School of Computer Science and Technology Beijing University of Posts and Telecommunications Beijing China School of Electrical Engineering and Automation Henan Polytechnic University Jiaozuo Henan China

This paper is devoted to the problem of state estimation for a class of dynamic system with multiple nonlinear-linear (NL) mixing state constraints. A computational algorithm was developed by C. Yang and E. Blasch to incorporate a positive definite quadratic form equality constraint into the Kalman filtering for the ground vehicle tracking. However, when the target tracked in multidimensional space, a single positive definite quadratic form constraint is not enough due to the involvement of other surface such as hyperboloid, paraboloid, or even plane. A analytic method of incorporating multiple nonlinear-linear mixing state constraints into the Kalman filter is presented here, and a sufficient condition is obtained that guarantee the existence of solution. The constraints may be time varying. At each time step the unconstrained Kalman filter solution is projected onto the state constraints surface. This significantly improves the prediction accuracy of the filter. The use of this algorithm is demonstrated on a nonlinear-linear mixing spacecraft positioning problem.

关键词： Kalman filters Symmetric matrices State estimation Optimization Covariance matrix Noise

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Determination of circular waits in multiple-reentrant flowlines based on machine-job incidence matrix 10

Determination of circular waits in multiple-reentrant flowli...

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2009 10th European control Conference, ECC 2009

作者： Petrovic, Tamara Bogdan, Stjepan Sindicic, Ivica Laboratory for Robotics and Intelligent Control Systems Department of Control and Computer Engineering University of Zagreb Zagreb Croatia Exor D.o.o Bani 72 Zagreb10000 Croatia

ISBN: (纸本)9783952417393

As the first step in resolving stability of a manufacturing system in the sense of deadlock, calculation of circular waits might involve time and memory consuming calculations. In this paper we propose an efficient method for determination of circular waits in multiple-reentrant flowline class (MRF) of manufacturing systems. We introduce machine-job incidence (MJI) matrix that can be obtained from Steward sequencing matrix and Kusiak machine-part incidence matrix. The method uses index vector and MJI matrix in order to allocate circular wait auxiliary vector. Resources involved in the circular wait are directly computed from the auxiliary vector. Although efficiency of the proposed method has been demonstrated on examples involving single- and multi- part type manufacturing workcells, the method can be used for other discrete event systems as well, as long as the system under study belongs to MRF class. © 2009 EUCA.

关键词： Manufacture

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Kinematics and its solution methodology of A 3-PRR flexure-based parallel mechanism

Kinematics and its solution methodology of A 3-PRR flexure-b...

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IASTED International Conference on Modelling, Simulation, and Identification, MSI 2009

作者： Tian, Y. Shirinzadeh, B. Zhang, D. Fatikow, S. Robotics and Mechatronics Research Laboratory Department of Mechanical and Aerospace Engineering Monash University Clayton VIC 3800 Australia School of Mechanical Engineering Tianjin University Tianjin 300072 China Division of Microrobotics and Control Engineering University of Oldenburg Oldenburg 26111 Germany

ISBN: (纸本)9780889868106

This paper presents the mechanical design and kinematic analysis methodologies of a 3-PRR flexure-based parallel mechanism, which can be utilized to conduct planar precision positioning as required for automating micro/ nano manipulation tasks. Flexure hinges are used as the revolute joints to provide smooth motion in the range of micrometers. Three high performance piezoelectric actuators are utilized to drive the flexure-based mechanism. The kinematics of the proposed flexure-based parallel mechanism is established. Finite element analysis is conducted to validate the performance of the 3-PRR flexure-based parallel mechanism. Two simplified methodologies are proposed to improve the computational efficiency of the kinematics of the developed mechanism.

关键词： Kinematics

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Fuzzy controller for cooperative object pushing with variable line contact

Fuzzy controller for cooperative object pushing with variabl...

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International Conference on Mechatronics (ICM)

作者： Mahsa Aliakbar Golkar Sarah Taghavi Namin Hossein Aminaiee Control and Intelligent Processing Center of Excellence Robotics and AI Laboratory Department of Electrical and Computer Engineering University of Tehran Iran

Designing an appropriate cooperation protocol in multi-robot systems such as multi-robot object manipulation systems is a challenging task. In this paper designing and implementing a cooperation protocol between two robots pushing an object toward an arbitrary goal configuration is investigated. The proposed method benefits from task decoupling which simplifies the cooperation protocol design. Each robot gets its proper action from a particular fuzzy inference system independently. The fuzzy controllers outputs are low-level robot commands by which the need to a robot path planning algorithm is eliminated. Simulation results show that robots could push the object to the goal configuration cooperatively. Experiments have been conducted to approve the proposed system.

关键词： Fuzzy control Robot kinematics Protocols Fuzzy systems Electric variables control control systems Multirobot systems Path planning Inference algorithms Mobile robots

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Acoustomyographic sensor realization

Acoustomyographic sensor realization

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2nd International Multi-Conference on engineering and Technological Innovation, IMETI 2009

作者： Krysztoforski, Krzysztof Jopek, Wojciech Wotczowski, Andrzej Division of Biomedical Engineering and Experimental Mechanics Wroclaw University of Technology Wyb. Wyspianskiego 27 Wroclaw 50-371 Poland Division of Measuring and Medical Electronic Instruments Wroclaw University of Technology Wyb. Wyspianskiego 27 Wroclaw 50-371 Poland Institute of Computer Engineering Control and Robotics Wroclaw University of Technology Wyb. Wyspianskiego 27 Wroclaw 50-371 Poland

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control system for reactor vessel inspection manipulator

Control system for reactor vessel inspection manipulator

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IEEE Conference on control Technology and Applications (CCTA)

作者： Alan Mutka Ivica Draganjac Zdenko Kovacic Zeljko Postruzin Ranko Munk Faculty of EE&C Department of Control and Computer Engineering LARICS-Laboratory of Robotics and Intelligent Control Systems University of Zagreb Zagreb Croatia Organization of Technology Development and Application HRID Limited Zagreb Croatia

In this paper a system for control and 3D visualization of a manipulator for weld inspection of nuclear reactor vessels is described. Based on client-server TCP/IP software architecture, the presented control system enables an operator to perform the entire inspection procedure remotely over a network, avoiding exposure to dangerous radiation which is commonly present in nuclear reactor environments. The developed graphical user interface provides all necessary tools needed for planning robot scan trajectories, their verification on a virtual 3D model and execution on a remote robot. In addition, the weld inspection process can be observed in parallel on a virtual robot and reactor vessel model and on live video streams captured by two special cameras mounted on the robot.

关键词： control systems Inductors Inspection Welding Parallel robots Visualization TCPIP Software architecture Graphical user interfaces Trajectory

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Soft-tissue modeling and image-guided control of steerable needles

Soft-tissue modeling and image-guided control of steerable n...

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Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： Nasser Sadati Meysam Torabi Reza Vaziri Reza Dehestani-Ardekani Electrical and Computer Engineering Department University of British Columbia Vancouver BC Canada Robotics and Machine Vision Laboratory Biomedical Engineering Division of the School of Electrical Engineering Sharif University of Technology Tehran Iran

In this paper, we exploit a fuzzy controller on a flexible bevel-tip needle to manipulate the needle's base in order to steer its tip in a preset obstacle-free and target-tracking path. Although the needle tends to follow a curvature path, spinning the needle with an extremely high rotational velocity makes it symmetric with respect to the tissue to follow a straight path. The fuzzy controller determines an appropriate spinning to generate the planned trajectory and, the closed-loop system tries to match the needle body with that trajectory. The swine's brain tissue model, extracted from an in-vitro experimental setup, is a non-homogenous, uncertain and fast-updatable network to model real tissues, needle and their interactions providing the essential visual feedback for the control system. The simulation results illustrate a precise path tracking of the bevel-tip needle based on the fuzzy controller's commands with two degrees of freedom.

关键词： Needles Fuzzy control Minimally invasive surgery Brain modeling Spinning Surges Manipulator dynamics Force feedback Intelligent robots Biomedical engineering

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Decentralized Output-Feedback control of Large-Scale Nonlinear Systems Based on High-Gain Multiple Time Scaling

Decentralized Output-Feedback Control of Large-Scale Nonline...

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2009 American control Conference (ACC 2009)

作者： P. Krishnamurthy F. Khorrami IntelliTech Microsystems Inc. (IMI) Bowie MD 20715 Control/Robotics Research Laboratory (CRRL) Department of Electrical and Computer Engineering Polytechnic University Brooklyn NY 11201

ISBN: (纸本)9781424445233

A globally stabilizing decentralized output-feedback controller is proposed for a general class of nonlinear interconnected large-scale systems. The subsystem interconnections and the dynamics of each subsystem feature both parametric and functional uncertainty. The controller design is based on a general high-gain scaling technique that utilizes arbitrary powers (instead of requiring successive powers) of the high-gain parameter with the powers chosen to satisfy certain inequalities depending on system nonlinearities. The scaling induces a weak-Cascading Upper Diagonal Dominance (w-CUDD) structure on the dynamics and allows relaxation of the cascading dominance assumption on upper diagonal terms. Disturbance attenuation properties of the proposed decentralized controller are also investigated.

关键词： high gain Power (Psychology) Decentralized feedback control time scaling dynamics controller design gain parameter Parametric SUB-SYSTEM Nonlinear systems

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