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IEEE Conference on control Technology and Applications (CCTA)

作者： E.K. Nyarko N. Peric I. Petrovic Department of Automation and Process Control Faculty of Electrical Engineering University of Osijek Osijek Croatia Department of Control and Computer Engineering in Automation Faculty of Electrical Engineering and Computing University of Zagreb Zagreb Croatia

The control of dynamical systems with inherent non-linear characteristics has motivated research in non-linear control theory. Two main approaches to dealing with uncertainties in control systems design are adaptive and robust control. In this paper, discrete direct adaptive control of unknown non-linear SISO systems is considered. The controller is implemented using a fuzzy neural network. The control concept is tested on a laboratory pilot plant and compared to a standard discrete PID Takahashi controller

关键词： Programmable control Adaptive control control systems Nonlinear control systems control theory Uncertainty Adaptive systems Robust control Fuzzy neural networks Fuzzy control

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On the detection of unknown input in positional control problems with noisy measurements

On the detection of unknown input in positional control prob...

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作者： Shinar, Josef Bokor, József Kulcsár, Balázs Israel Institute of Technology Faculty of Aerospace Engineering Haifa 3200 Israel Systems and Control Laboratory Computer Automation Research Institute Hungarian Academy of Sciences P.O.Box 63 Budapest Hungary

ISBN: (纸本)008045108X

The paper examines the conditions for isolating the unknown input detection from the effects of the measurements noise in the important family of positional control problems. The study is motivated by the need of improving the homing performance of interceptor missiles against randomly maneuvering targets. The required isolation is possible if, in addition to noisy relative position measurements, noise-free measurement of the line of slight rate or the relative lateral velocity is available. Although with noisy measurement of line of slight rate the isolation of the input is not possible, the detection filter designed for the noise- free case succeeds to provide a satisfactory estimate of target acceleration, which is needed for an improved homing performance. Copyright © 2005 IFAC.

关键词： Bandpass filters

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On computing determinants of large Sylvester type matrices

On computing determinants of large Sylvester type matrices

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作者： Kujan, Petr Hromčík, Martin Šebek, Michael Department of Control Engineering Faculty of Electrical Engineering Czech Technical University Prague Czech Republic Centre for Applied Cybernetics Faculty of Electrical Engineering Czech Technical University in Prague Karlovo nam. 13 12135 Prague 2 Czech Republic Centre for Applied Cybernetics Institute of Information Theory and Automation Czech Republic Institute of Information Theory and Automation Pod vodarenskou vezi 4 18208 Praha 8 Czech Republic

ISBN: (纸本)008045108X

This work is devoted to computation of large n-D polynomial determinants with a special structure. Applications involve n-D systems theory (e.g. coprimeness test for two n-D polynomials or the theory of algebraic equations. More specifically, these determinants were exploited in (Chiasson et al., 2003b;Chiasson et al., 2003a) to solve the practical problem of multilevel converter by a special computational procedure. To tackle the concerned problem it is essential to solve a system of polynomial equations with many unknowns. An algorithm was chosen based on elimination theory using resultants leading to the fundamental problem of computing determinants of large Sylvester type matrices with n-D polynomial entries. The aim of this work is to propose and test new numerical algorithms that would make it possible to solve the concerned problems more effectively. Copyright © 2005 IFAC.

关键词： Fast Fourier transforms

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DSPN Model and Performance Analysis of FF MAC Sub-layer

DSPN Model and Performance Analysis of FF MAC Sub-layer

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2005国际机械工程与力学会议

作者： Yue ZHOU Haibin YU Tianran WANG Shenyang Institute of Automation Chinese Academy of Sciences Faculty of Information and Control Engineering Shenyang Jianzhu University

A detailed DSPN (Deterministic and Stochastic Petri Net) model and performance analysis of FF MAC sub-layer is constructed in this paper. Firstly, the centralized medium access protocol of FF MAC mechanism is introduced. Secondly, the accurate DSPN models of FF MAC based on the same size periodic window and the different size periodic window are constructed according to the characteristic of periodic window in each microcycle respectively. Thirdly, performance analysis is presented in following performance aspects: the maximum throughout and the maximum network utilization. Finally, the simulation research based on the DSPN model is developed, which shows the relation throughout, mean aperiodic message delay and utilization with traffic load of aperiodic messages.

关键词： FF, Centralized medium access protocol, Deterministic and Stochastic Petri Net, Performance analysis

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Intelligent reconfiguration using knowledge based agent system

Intelligent reconfiguration using knowledge based agent syst...

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International Conference on Emerging Technologies and Factory automation (ETFA)

作者： M. Merdan I. Terzic A. Zoitl B. Favre-Bulle Automation and Control Institute Faculty of Electrical Engineering and Information Technology University of Technology Vienna Vienna Austria

The new reconfigurable manufacturing paradigm requires development of systematic methods, and software tools, for the rapid design and builds up of production systems that change the capacity and functionality in response to the market demand. The effectiveness of reconfiguration depends upon the development of such tools. In this work, the new concept consisting of ontology knowledge based systems in connection with software agents are applied for the solution of the reconfiguration problem. Reconfigurability is achieved by the employment of the most modern technologies such as ontology driven solution

关键词： Intelligent agent Ontologies Production systems Software agents Manufacturing automation control systems Routing Multiagent systems Design automation Automatic control

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Web-based MATHEMATICA platform for systems and control education

Web-based MATHEMATICA platform for systems and control educa...

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20th IEEE International Symposium on Intelligent control, ISIC '05 and the13th Mediterranean Conference on control and automation, MED '05

作者： Kujan, Petr Hromčík, Martin Šebek, Michael Department of Control Engineering Faculty of Electrical Engineering Czech Technical University in Prague Karlovo nam. 13 12135 Prague 2 Czech Republic Centre for Applied Cybernetics Faculty of Electrical Engineering Czech Technical University in Prague Karlovo nam. 13 12135 Prague 2 Czech Republic Centre for Applied Cybernetics Institute of Information Theory and Automation Pod vodarenskou vezi 4 18208 Praha 8 Czech Republic Institute of Information Theory and Automation Pod vodarenskou vezi 4 18208 Praha 8 Czech Republic

ISBN: (纸本)0780389360

Computer algebra software tools in general, and the MATHEMATICA system in particular, are increasingly employed during the controls and systems graduate and undergraduate courses at FEE CTU in Prague. MATHEMATICA benefits from its high-level user interface, graphical abilities, as well as numerical and symbolic computational power and dedicated packages for control systems analysis and design (control Systems Professional and Advanced Numerical Methods). In addition, MATHEMATICA provides a web-based platform for publication of results and presenting user-callable routines (webMATHEMATICA). In the Czech Republic a project financed by the Ministry of Education and called PUMA (Power User Mathematic Array) has been started recently, focused on creation of webaccessible software tools to support education at technical universities. The authors have been involved in these efforts and would like to contribute by creating a web site based on webMATHEMATICA dedicated to numerical and symbolic computations for systems and controls. This paper is the first report on this topic. The work is in rapid progress now and the paper summarizes the authors' plans and first results. ©2005 IEEE.

关键词： Computer aided software engineering

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Design and Implementation of Fuzzy Supervisory PI controllers Using Fuzzy c-Means Clustering Combined with Fuzzy Gain Scheduling for a Binary Distillation Column

Design and Implementation of Fuzzy Supervisory PI Controller...

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IEEE Region 10 International Conference TENCON

作者： Kannawat Somsung Suvalai Pratishthananda Department of Process Control & Automation Nakornthai Strip Mill Public Limited Company Thailand Department of Electrical Engineering Faculty of Engineering Chulalongkom University Bangkok Thailand

In this paper, fuzzy supervisory PI controllers are developed and implemented on a pilot plant binary distillation column. Fuzzy c-means clustering technique is used in selecting membership functions and fuzzy rules are determined using fuzzy gain scheduling technique. Thus, the need of heuristic method for designing fuzzy membership functions and rules from expert knowledge is omitted. Then, the fuzzy supervisors adapt the parameters of the PI controllers on line. The task of the controllers is to perform dual composition control of the top and bottom products when the disturbances enter the column in the form of changes in feed flow rate. The results show that the fuzzy supervisory PI controllers achieve much better performance than the fixed PI controllers.

关键词： Fuzzy control Distillation equipment Temperature control Job shop scheduling Feeds Industrial control Process control Fuzzy systems Chemical industry Supervisory control

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Close-Loop System Identification Using Over-sampling Scheme and Its Estimate Accuracy Analysis

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Journal of Shanghai University(English Edition) 2005年第5期9卷 437-444页

作者：胡怀中孙连明刘文江 Faculty of Automation and Control Xi'an Jiaotong University Xi'an 710049 P. R. China Department of Electrical Engineering Keio University Yokohama Japan

A new identification method for a linear discrete-time closed-loop system is proposed based on an output over-sampling scheme. When the system outputs are over-sampled the new output sequences would contain more information about the plant structure. Using general least squares method （GLS） the plant over-sampled model should be recognized. Then the original plant model should be obtained by its relationship with the over-sampled model. Compared with conventional approaches the advantage of the new method is that even if the ordinary identifiability conditions are not satisfied, a close-loop system can be identified by using the oversampled output without utilizing any external test signal. Accuracy analysis shows the relationship between the estimation error and the over-sampling rate. Numerical simulation illnstrates its effectiveness.

关键词： system identification close-loop over-sampling estimate accuracy.

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Real-Time control of a Binary Distillation Column Using HGA Fuzzy Supervisory PI controllers

Real-Time Control of a Binary Distillation Column Using HGA ...

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IEEE Region 10 International Conference TENCON

作者： Kiatkajohn Worapradya Suvalai Pratishthananda Department of Process Control & Automation Nakornthai Strip Mill Public Limited Company Thailand Department of Electrical Engineering Faculty of Engineering Chulalongkom University Bangkok Thailand

In this paper, an optimum fuzzy supervisory PI controller using hierarchical genetic algorithms is developed and implemented for controlling the top and bottom product quality of a nonlinear, multi-input multi-output binary distillation column when the disturbance enters the column in the form of the changes in feed flow rate. Two conventional PI controllers, one for the bottom product composition and another for the top product composition, are used together in the control scheme. Hierarchical genetic algorithms are used to derive the optimal number and shape of membership functions and fuzzy rules of a fuzzy supervisory system that adapts the parameters of the PI controllers. The real-time implementation results show the effectiveness of the proposed method.

关键词： Distillation equipment Fuzzy control Feeds Shape control control systems Fuzzy sets Genetic algorithms Fuzzy systems Optimal control MIMO

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ON COMPUTING DETERMINANTS OF LARGE SYLVESTER TYPE MATRICES

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IFAC Proceedings Volumes 2005年第1期38卷 880-885页

作者： Petr Kujan Martin HromĈík Michael Ŝebek Department of Control Engineering Faculty of Electrical Engineering Czech Technical University in Prague Centre for Applied Cybernetics Faculty of Electrical Engineering Czech Technical University in Prague Karlovo nam. 13 12135 Prague 2 Czech Republic Centre for Applied Cybernetics Institute of Information Theory and Automation Institute of Information Theory and Automation Pod vodarenskou vezi 4 18208 Praha 8 Czech Republic

This work is devoted to computation of large n-D polynomial determinants with a special structure. Applications involve n-D systems theory (e.g. coprimeness test for two n-D polynomials or the theory of algebraic equations. More specifically, these determinants were exploited in (Chiasson et al. , 2003 b ; Chiasson et al. , 2003 a ) to solve the practical problem of multilevel converter by a special computational procedure. To tackle the concerned problem it is essential to solve a system of polynomial equations with many unknowns. An algorithm was chosen based on elimination theory using resultants leading to the fundamental problem of computing determinants of large Sylvester type matrices with n-D polynomial entries. The aim of this work is to propose and test new numerical algorithms that would make it possible to solve the concerned problems more effectively.

关键词： Polynomial methods Numerical methods Fast Fourier Transform

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