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作者： Cristea, Smaranda De Prada, César De Keyser, Robin Department of Systems Engineering and Automatic Control Faculty of Sciences University of Valladolid c/ Real de Burgos s/n Spain Department of Control Engineering and Automation University of Ghent Technologiepark-Zwijnaarde 9 B-9052 Ghent Belgium

ISBN: (纸本)008045108X

This paper deals with the control of variable-delay processes, where the delay depends on the value of the manipulated variable, which results in a non-linear system difficult to control. As a reference process, the case of a heated tank where the controlled variable is the liquid temperature and the placement of the sensor introduce a transport delay in the control loop, has been considered. This challenging problem is approached from the perspective of predictive control, using the non-linear EPSAC controller. Copyright © 2005 IFAC.

关键词： Linear systems

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PCB testing using infrared thermal signatures

PCB testing using infrared thermal signatures

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IMTC'05 - Proceedings of the IEEE Instrumentation and Measurement Technology Conference

作者： Moldovan, Horatiu Marcu, Marius Vladutiu, Mircea Department of Computer and Software Engineering Politehnica University of Timisoara Faculty of Automation Control and Computer Science Postal Address 2 V. Parvan Timisoara Romania

ISBN: (纸本)0780388798

A Printed Circuit Board (PCB) testing method using infrared thermal signatures is presented. The concept of thermal signature for PCBs is introduced. Based on this concept, the testing method is able to classify the integrated circuits (ICs) on a PCB into a number of classes (e.g. functional - fault free, non-functional - faulty and less reliable - functional circuits with high current consumption). According with thermal signature of each IC on the PCB, the PCBs can be also classified in the same number of classes. The classification system is a feed-forward neural network that learns and classifies the information achieved from the infrared image. © 2005 IEEE.

关键词： Printed circuit boards

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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 International Conference on control Applications

作者： Worapradya, K Pratishthananda, S Department of Process Control and Automation Nakornthai Strip Mill Plc. Chonburi Industrial Estate 20230 Thailand Department of Electrical Engineering Faculty of Engineering Chulalongkorn University Bangkok 10330 Thailand

ISBN: (纸本)0780393538

In this paper, a HGA 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 disturbances enter 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 a decentralized control scheme to per form dual composition control. 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： MIMO systems PI control distillation distillation equipment fuzzy control genetic algorithms nonlinear control systems optimal control process control HGA fuzzy supervisory PI controllers binary distillation column hierarchical genetic algorithms multi-i Distillation columns PI control Genetic Algorithm (GA) Nonlinear control systems multiple input multiple output systems Fuzzy control Process control Distillation distilling Distillation apparatus Optimal control Real time control oversight

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UML-PA AS AN engineering MODEL FOR DISTRIBUTED PROCESS automation

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IFAC Proceedings Volumes 2005年第1期38卷 129-134页

作者： Uwe Katzke Birgit Vogel-Heuser Automation and Process Control Engineering Faculty of Electrical Information and Media Engineering University of Wuppertal 42119 Wuppertal Germany

Common engineering approaches and modeling approaches from software engineering are brought together. For the domain of process automation an implementation oriented approach for an object oriented software development for heterogeneous distributed systems is introduced. Model elements for control are added to UML as well as small-scale patterns for plant automation. Besides large-scale patterns are introduced as well as implementational models. The adoption of UML regarding applied diagrams and stereotypes for process automation will be introduced and evaluated.

关键词： control applications of computer control system design modelling real time computer systems programmable logic controllers programming approaches object modelling techniques object oriented programming

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Experimental investigations of a direct adaptive neurofuzzy controller

Experimental investigations of a direct adaptive neurofuzzy ...

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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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