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American control Conference

作者： Dong Wang Peng Shi Wei Wang Hamid Reza Karimi Jie Lian School of Control Science and Engineering Dalian University of Technology Dalian 116023 P. R. China Department of Computing and Mathematical Sciences University of Glamorgan Pontypridd CF37 1DL UK Department of Engineering Faculty of Engineering and Science University of Agder N-4898 Grimstad Norway

ISBN: (纸本)9781457710957

In this paper, the problem of non-fragile observer-based H_∞ control for discrete-time switched delay systems is investigated. Both data missing and time delays are taken into account in the links from sensors to observers and from controllers to actuators. Such problem is transformed into an H_∞ control problem for stochastic switched delay systems. Average dwell time (ADT) approach is used to obtain sufficient conditions on the solvability of such problems. An example is provided to show the effectiveness of the proposed method.

关键词： Switches Delay effects Observers Delay systems Sensors Switched systems

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Accuracy Analysis of a Covariance Matching Method for Continuous-time Errors-in-variables System Identification *

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IFAC Proceedings Volumes 2012年第16期45卷 1383-1388页

作者： Torsten Söderström Yasir Irshad Magnus Mossberg Wei Xing Zheng Division of Systems and Control Department of Information Technology Uppsala University P O Box 337 SE-75105 Uppsala Sweden Department of Physics and Electrical Engineering Karlstad University SE-65188 Karlstad Sweden School of Computing and Mathematics University of Western Sydney Penrith South DC NSW 1797 Australia

A covariance matching method for continuous-time errors-in-variables system identification from discrete-time data is analyzed. The asymptotic normalized covariance matrix, valid for a large number of data and a small sampling interval, is evaluated. This involves the evaluation of a covariance matrix of estimated covariance elements and estimated derivatives of such elements, and large parts of the paper are devoted to this task.

关键词： Continuous-time systems errors-in-variables systems parameter estimation covariance matching accuracy analysis

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Biophotogrammetry model of respiratory motion analysis applied to children

Biophotogrammetry model of respiratory motion analysis appli...

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

作者： W. L. Ripka D. da V. Ricieri L. Ulbricht E. B. Neves A. M. W Stadnik E. F. R. Romaneli Electrical Engineering and Industrial Computing Program Federal University of Technology Paraná Brazil Physical Education Department Federal University of Paraná Brazil Master Program in Biomedical Engineering Physical Education Federal University of Technology Paraná Brazil Control and Automation Engineering Federal University of Technology Paraná Brazil

This study aimed to test a protocol of measurements based on Biophotogrammetry to Analysis of Respiratory Mechanics (BARM) in healthy children. Seventeen normal spirometric children (six male and 11 female) were tested. Their performed maneuvers of forced inspiratory vital capacity were recorded in the supine position. The images were acquired by a digital camera, laterally placed to the trunk. Surface markers allowed that the files, exported to CorelDraw® software, were processed by irregular trapezoids paths. Compartments were defined in the thoracic (TX), abdominal (AB) and the chest wall (CW). They were defined at the end of an inspiration and expiration, both maximum, controlled by a digital spirometer. The result showed that the measured areas at the inspiratory and expiratory periods were statistically different (p

关键词： Muscles Educational institutions Lungs Member and Geographic Activities Board committees Biological system modeling Pediatrics Surface treatment

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Predictive control of convex polyhedron LPV systems with Markov jumping parameters

Predictive control of convex polyhedron LPV systems with Mar...

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Chinese control and Decision Conference, CCDC

作者： Yanyan Yin Fei Liu Peng Shi Hamid Reza Karimi Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education) Institute of Automation Jiangnan University Wuxi 214122 China Department of Computing and Mathematical Sciences University of Glamorgan Pontypridd CF37 1DL United Kingdom Department of Engineering Faculty of Engineering and Science University of Agder N-4898 Grimstad Norway

The problem of receding horizon predictive control of stochastic linear parameter varying systems is discussed. First, constant coefficient matrices are obtained at each vertex in the interior of linear parameter varying system, and then, by considering semi-definite programming constraints, weight coefficients between each vertex are calculated, and the equal coefficients matrices for the time variable system are obtained. Second, in the given receding horizon, for each mode sequence of the stochastic convex polyhedron linear parameter varying systems, the optimal control input sequences are designed in order to make the states into a terminal invariant set. Outside of the receding horizon, stability of the system is guaranteed by searching a state feedback control law. Finally, receding horizon predictive controller is designed in terms of linear matrix inequality for such system. Simulation example shows the validity of this method.

关键词： Markov processes Predictive control Equations Educational institutions Programming Symmetric matrices

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Recursive filtering for a class of nonlinear systems with missing measurements

Recursive filtering for a class of nonlinear systems with mi...

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UKACC International Conference on control (control)

作者： Jun Hu Zidong Wang Bo Shen Chenxiao Cai James Lam Research Institute of Intelligent Control and Systems Harbin Institute of Technology Harbin China School of Automation Nanjing University of Science and Technology of PLA Nanjing China Department of Information Systems and Computing Brunel University London UK Department of Mechanical Engineering University of Hong Kong Hong Kong China Institute for Automatic Control and Complex Systems University of Duisburg-Essen Duisburg Germany

ISBN: (纸本)9781467315593

This paper is concerned with the finite-horizon recursive filtering problem for a class of nonlinear time-varying systems with missing measurements. The missing measurements are modeled by a series of mutually independent random variables obeying Bernoulli distributions with possibly different occurrence probabilities. Attention is focused on the design of a recursive filter such that, for the missing measurements, an upper bound for the filtering error covariance is guaranteed and such an upper bound is subsequently minimized by properly designing the filter parameters at each sampling instant. The desired filter parameters are obtained by solving two Riccati-like difference equations that are of a recursive form suitable for online applications. A simulation example is exploited to demonstrate the effectiveness of the proposed filter design scheme.

关键词： Upper bound Estimation Difference equations Kalman filters Educational institutions Random variables Noise

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Complete coverage D*;Algorithm for path planning of a floor-cleaning mobile robot

Complete coverage D*;Algorithm for path planning of a floor-...

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作者： Dakulović, Marija Horvatić, Sanja Petrović, Ivan Department of Control and Computer Engineering Faculty of Electrical Engineering and Computing University of Zagreb Croatia

ISBN: (纸本)9783902661937

Inspired by the path transform (PT) algorithm of Zelinsky et al. the novel algorithm of complete coverage called complete coverage D*;(CCD*;) algorithm is developed, based on the D*;search of the two-dimensional occupancy grid map of the environment. Unlike the original PT algorithm the CCD*;algorithm takes the robot's dimension into account, with emphasis on safety of motion and reductions of path length and search time. Additionally, the proposed CCD*;algorithm has ability to produce new complete coverage path as the environment changes. The algorithms were tested on a Pioneer 3DX mobile robot equipped with a laser range finder. © 2011 IFAC.

关键词： Mobile robots

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Mutual information for diagnosis of AD

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Journal of the Neurological Sciences 2013年 333卷 e355-e355页

作者： M. Vališ O. Vyšata A. Procházka L. Šimůnek J. Hort L. Pazdera Department of Neurology Faculty Hospital Charles University Hradec Králové /INS；Czech Republic/INS Department of Computing and Control Engineering Institute of Chemical Technology Praque /INS；Czech Republic/INS Department of Neurology International Clinical Research Centre St. Anne'/INS；s University Hospital Brno /INS；Czech Republic/INS Department of Neurology 2nd Faculty of Medicine Charles University Praque /INS；Czech Republic/INS Motol University Hospital Praque /INS；Czech Republic/INS Neurocentre Caregroup Ltd. Rychnov nad Kneznou Czech Republic

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A Recursive Local Linear Estimator for Identification of Nonlinear ARX Systems *

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IFAC Proceedings Volumes 2012年第16期45卷 1517-1522页

作者： Wen-Xiao Zhao Wei Xing Zheng Er-Wei Bai Key Laboratory of Systems and Control Academy of Mathematics and Systems Science CAS Beijing P. R. China National Center for Mathematics and Interdisciplinary Sciences CAS Beijing P. R. China School of Computing Engineering and Mathematics University of Western Sydney Penrith NSW 2751 Australia Department of Electrical and Computer Engineering University of Iowa Iowa City IA 52242 USA

In this work, we propose a recursive local linear estimator (RLLE) for identification of nonlinear autoregressive systems with exogenous inputs, along with an analysis of its strong consistency and asymptotical mean s... 详细信息

关键词： Nonlinear ARX systems recursive identification local linear estimator almost sure convergence

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Stabilization of a Class of Slowly Switched Positive Linear Systems: State-Feedback control

Stabilization of a Class of Slowly Switched Positive Linear ...

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American control Conference

作者： Xudong Zhao Lixian Zhang Peng Shi Hamid Reza Karimi College of Information and Control Engi- neering China University of Petroleum Qingdao 266555 China Space Control and Inertial Technology Research Center Harbin Institute of Technology Harbin 150001 China Department of Computing and Mathematical Sciences University of Glamorgan Pontypridd CF37 1DL U.K. and the School of Engineering and Science Victoria University Melbourne 8001 Vic Australia Department of Engineering Faculty of Technology and Science University of Agder N-4898 Grimstad Norway

ISBN: (纸本)9781457710957

The main goal of this paper is to investigate the stabilization problem for a class of switched positive linear systems (SPLS) with average dwell time (ADT) switching in continuous-time context. State-feedback controllers and the corresponding switching law with ADT property are designed, which stabilize the closed-loop systems while keeping the states nonnegative. The proposed conditions, formulated as linear matrix inequalities, can be directly used for controller synthesis and switching designing. Finally, a numerical example is given to demonstrate the validity of the obtained results.

关键词： Average dwell time stabilization switched positive linear systems state feedback control Linear system Closed loop systems abstract data types feedback control numerical example linear matrix inequalities controllers switching law

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Modified Banker's algorithm for scheduling in multi-AGV systems

Modified Banker's algorithm for scheduling in multi-AGV syst...

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2011 7th IEEE International Conference on Automation Science and engineering, CASE 2011

作者： Kalinovcic, Luka Petrovic, Tamara Bogdan, Stjepan Bobanac, Vedran Department of Control and Computer Engineering Faculty of Electrical Engineering and Computing University of Zagreb Zagreb Croatia

ISBN: (纸本)9781457717307

In today's highly complex multi-AGV systems key research objective is finding a scheduling and routing policy that avoids deadlock while assuring that vehicle utilization is as high as possible. It is well known that finding such an optimal policy is a NP-hard task in general case. Therefore, big part of the research is oriented towards finding various suboptimal policies that can be applied to real world plants. In this paper we propose modified Banker's algorithm for scheduling in multi-AGV systems. A predetermined mission's path is executed in a way that some non-safe states are allowed in order to achieve better utilization of vehicles. A graph-based method of polynomial complexity for verification of these states is given. Algorithm is tested on a layout of a real plant for packing and warehousing palettes. Results shown at the end of the paper demonstrate advantages of the proposed method compared with other methods based on Banker's algorithm. © 2011 IEEE.

关键词： Scheduling algorithms

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