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SET MEMBERSHIP ESTIMATION OF PARAMETERS AND VARIABLES IN DYNAMIC NETWORKS BY RECURSIVE ALGORITHMS WITH MOVING MEASUREMENT WINDOW

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IFAC Proceedings Volumes 2005年第1期38卷 21-26页

作者： Kazimierz Duzinkiewicz Mietek A. Brdys Department of Electronic Electrical an Computer Engineering School of Engineering The University of Birmingham Birmingham B15 2TT UK Department of Automatic Control Gdansk University of Technology G. Narutowicza 11/12 80 9 52 Gdansk Poland

The paper considers a set-membership joint estimation of variables and parameters in complex dynamic networks based on parametric uncertain models and limited hard measurements. The recursive estimation algorithm with moving measurement window is derived that is suitable for on line network monitoring. The window allows stabilising the classic recursive estimation algorithm and significantly improves the estimate tightness. The estimator is validated on a case study water distribution network. Tight set estimates of unmeasured pipe flows, nodal heads and pipe resistances are obtained.

关键词： set membership estimation uncertainty complexity networks water

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Steady-state invariant frequency and amplitude droop control using adaptive output impedance for parallel-connected UPS inverters

Steady-state invariant frequency and amplitude droop control...

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20th Annual IEEEApplied Power ElectronicsConference and Exposition, APEC 2005

作者： Guerrero, Josep M. De Vicuña, Luis García Matas, José Miret, Jaume Cruz, Juan Sustainable Distributed Generation Systems and Renewable Energy Group Escola Universitària d'Enginyeria Tècnica Industrial de Barcelona C/Comte d'Urgell 187 08036 - Barcelona Department of Automatic Control Systems and Computer Engineering Department of Electronic Engineering Universitat Politècnica de Catalunya Av. Victor Balaguer S/N 08800 - Vilanova i la Geltrú Spain

ISBN: (纸本)0780389751

In this paper, a novel wireless load-sharing controller for parallel connected UPS inverters is proposed. As opposed to the conventional droop method, the proposed method achieves stable steady-state frequency and amplitude. The paper explorers the output impedance of the UPS inverters, and an adaptive virtual output impedance is proposed in order to reduce its line impedance impact. Experimental results are presented from two 6 kVA UPS inverters controlled by TMS320LF2407A DSP boards, showing the feasibility of the proposed approach. © 2005 IEEE.

关键词： Electric inverters

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FAULT DETECTION FILTER FOR NONLINEAR SYSTEMS USING LINEAR APPROXIMATIONS

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IFAC Proceedings Volumes 2005年第1期38卷 55-60页

作者： C. Navarro Hernandez F. Crusca M. Aldeen S.P. Banks Department of Automatic Control and Systems Engineering University of Sheffield Mappin Street Sheffield S1 3JD UK Department of Electrical and Computer Systems Engineering Monash University Clayton VIC 3800 Australia Department of Electrical and Electronic Engineering The University of Melbourne Parkville VIC 3010 Australia

In this paper, the design of a fault detection filter for nonlinear systems is presented. The nonlinear system is represented as a sequence of linear time-varying approximations and at each linear approximation the design of an optimal stochastic fault detection filter for linear time-varying systems is applied. The final residual is primarily affected by a target fault and minimally by nuisance faults.

关键词： Fault detection Filter design Linear equations Nonlinear system Time-varying systems

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Iterative learning control for cross-coupled contour motion systems

Iterative learning control for cross-coupled contour motion ...

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IEEE International Conference on Mechatronics and Automation

作者： HongSheng Li Xingpeng Zhou YangQuan Chen Department of Automatic Control South-East University Nanjing Jiangsu China Center for Self-Organizing and Intelligent Systems Department of Electrical and Computer Engineering Utah State University Logan UT USA

Iterative learning control (ILC) is a powerful control concept that iteratively improves the behavior of processes that are repetitive in nature and cross-coupled control (CCC) has been developed to effectively reduce the contouring error. This paper proposes an integrated controller which combines ILC and CCC to achieve a better performance. In the presented preliminary simulation study, smaller contour error and tracking error can be achieved and moreover, contouring error is less oscillatory because CCC suppresses the inter-axis mismatch "cross error".

关键词： Motion control control systems Error correction computer errors computer numerical control Feedback loop automatic control Adaptive control Feedforward systems Tracking loops

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Fast technique of impulsive noise removal in multichannel images

Fast technique of impulsive noise removal in multichannel im...

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IEEE International Symposium on Industrial Electronics (ISIE)

作者： B. Smolka A. Chydzinski R. Lukac K.N. Plataniotsis A.N. Venetsanopoulos Faculty of Automatic Control Electronics and Computer Science Silesian University of Technology Gliwice Poland Edward S. Rogers Sr. Department of Electrical and Computer Engineering University of Toronto Toronto ONT Canada

In this paper a novel approach to the impulsive noise removal in color images is presented. The proposed technique employs the switching scheme based on the impulse detection mechanism using the so called peer group concept. Compared to the vector median filter, the proposed technique consistently yields better results in suppressing both the random-valued and fixed-valued impulsive noise. The main advantage of the proposed noise detection framework is its enormous computational speed, which enables efficient filtering of large images in real-time applications.

关键词： Nonlinear filters Vectors Colored noise Color Noise reduction automatic control computer science Strontium Educational institutions Filtering

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Mobile robots for search and rescue

Mobile robots for search and rescue

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IEEE International Workshop on Safety, Security, and Rescue Robotics (SSRR)

作者： N. Ruangpayoongsak H. Roth J. Chudoba Institute of Automatic Control Engineering University of Siegen Siegen Germany Applied Computer and Software Engineering Centre Wurzburg Germany Gerstener Laboratory Department of Cybernetics Czech Technical University Prague Czech Republic

Mobile robots are integrated into a search and rescue team as tools for searching victims in dangerous areas that is harmful for human, as to provide the perception data for map building, and as to follow the human entity during the mission. The teleoperated control and the autonomous path following is implemented on the robots for the semiautonomous navigation in the simulated firing scenario. This work focuses on the robot entities in the PeLoTe project (building presence through localization for hybrid telematic teams). The architecture of the software integration for mobile robots into the PeLoTe system and the experimental results are presented.

关键词： Mobile robots Humans Robot kinematics Navigation Buildings Telematics Robot sensing systems Fires computer architecture automatic control

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Proportional plus integral control and disturbance rejection for differential linear repetitive processes

Proportional plus integral control and disturbance rejection...

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American control Conference (ACC)

作者： B. Sulikowski K. Galkowski E. Rogers D.H. Owens Institute of Control and Computation Engineering University of Zielona Gora Zielona Gora Poland University of Wuppertal Wuppertal Germany School of Electronics and Computer Science University of Southampton Southampton UK Department of Automatic Control and Systems Engineering University of Sheffield Sheffield UK

Repetitive processes are a distinct class of two-dimensional systems (i.e. information propagates in two independent directions) of both systems theoretic and applications interest. They cannot be controlled by direct extension of existing techniques from either standard (termed 1D in the associated literature) or two-dimensional (2D) systems theory. Most of the currently available results for them focus on fundamental properties such as stability, controllability etc. Recently, however, there has been a move (prompted by the progress in this earlier research) towards the development of a control theory, and associated design algorithms, for the subclasses of so-called differential and discrete linear repetitive processes which arise in applications such as iterative learning control. In this paper we continue this theme by investigating the role of proportional plus integral action in the differential case.

关键词： Pi control Proportional control control systems Iterative algorithms control theory Algorithm design and analysis automatic control Optimal control Stability analysis Linear systems

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LOWER – LEVEL controlLER FOR HIERARCHICAL control OF DISSOLVED OXYGEN CONCENTRATION IN ACTIVATED SLUDGE PROCESSES

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IFAC Proceedings Volumes 2005年第1期38卷 9-14页

作者： R. Piotrowski M.A. Brdys Department of Automatic Control Gdansk University of Technology ul. G. Narutowicza 11/12 80 952 Gdansk Poland Department of Electronic Electrical and Computer Engineering The University of Birmingham Birmingham B15 2TT UK

The paper addresses control design for an aeration system within a hierarchical structure for an integrated control of dissolved oxygen in the activated sludge processes. In the paper the hybrid predictive controller ... 详细信息

关键词： air biotechnology dynamic systems hierarchical control integer programming nonlinear systems predictive control waste treatment

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Simple feedback linearizing controller to reduce audiosusceptibility and load disturbance in the full-bridge current doubler synchronous rectifier

Simple feedback linearizing controller to reduce audiosuscep...

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Annual IEEE Conference on Applied Power Electronics Conference and Exposition (APEC)

作者： J.M. Guerrero L.G. de Vicuna N. Berbel J. Sosa M. Castilla Department of Automatic Control Systems and Computer Engineering Universidad de Los Andes Merida Venezuela Department of Automatic Control Systems and Computer Engineering Sustainable Distributed Generation Systems and Renewable Energy Group Tècnica Industrial de Barcelona Barcelona Spain Department of Electronic Engineering Universitat Politècnica de Catalunya Spain Departamento: Laboratorio de Instrumentación Científica. Universidad de Los Andes Mérida Venezuela

The full-bridge converter with current-doublet synchronous rectifier (FB-CDSR) is a promising topology to implement low-voltage high-current power supplies. This paper proposes a novel control for this converter, which provides the following features: fast transient response, fixed switching frequency, and high robustness against large-signal disturbances in the input-voltage and the load-current. Furthermore, this controller avoids the use of any current sensor and can be implemented by means of cheap analog circuits, which highlights its low-cost and simplicity. The parallel operation of several HB-CDSR is also discussed Finally, experimental results are provided in order to show the validity of the proposed control technique

关键词： Linear feedback control systems Rectifiers Topology Zero voltage switching Power supplies Switching converters Bridge circuits Power engineering and energy Transient response Robustness

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The system reliability analysis based on the relation of fuzzy infection

The system reliability analysis based on the relation of fuz...

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International Conference on control and Automation (ICCA)

作者： Chuan Sun Yongji Wang Xiangou Zhu Department of Mechanic and Dynamic Engineering HuangShi Polytechnic College Huangshi Hubei China Department of Automatic Control Huazhong University of Science and Technology Wuhan Hubei China College of Computer Science and Engineering WenZhou University Wenzhou Zhejiang China

In this paper, using the fuzzy theory and gray theory, a concept of the degree of fuzzy infection and a new reliability analysis method based on the relation of fuzzy infection were proposed, and the mathematical mode of series connection and parallel connection system was first set up and their rationalities were proven. An illustrational example was given to demonstrate the effectiveness of this theory.

关键词： Fuzzy systems Reliability theory Fuzzy control Fuzzy set theory Reliability engineering Educational institutions Sun control systems computer science Failure analysis

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