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EMBEDDED SYSTEM FOR AUTOMATION VISUAL TESTING OF ELECTRONIC MODULES

IFAC Proceedings Volumes 2005年第1期38卷 32-37页

作者： Radim Ermis Bohumil Horak Vilem Srovnal Siemens VDO Automotive Frenstat p.R. Czech Republic VŠB – Technical University of Ostrava Czech Republic Faculty of Electrical Engineering and Computer Science Department of Measurement and Control

The subsystem of a visual functional test is an embedded system, which is an integral part of testing equipment for functional testing of electronic modules of dashboards of vehicles after their installation. The flexible solution of structure of measuring an information subsystem chain with a CCD camera and its interconnection with a controlling PC of testing equipment enables measurement and also analysis, in a long term time horizon, the functional characteristics of electro-optical parts installed generally in electronic modules produced. The solution is proposed with respect to reliability, the flexibility of re-installation also for other type of the electronic module measured, removal of the human factor from the process of visual functional tests and harmonization of the testing period with the period of production line.

关键词： Visual Functional test Measuring Embedded system Cameras

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Global optimization in complex circuits design

Global optimization in complex circuits design

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International Symposium on Signals, Circuits and Systems (ISSCS)

作者： C. Pruteanu D. Galea C.-G. Haba Faculty of Automatic Control and Computer Science Gheorghe Asachi Technical University of Iasi Iasi Romania Faculty of Electrical Engineering Gheorghe Asachi Technical University of Iasi Iasi Romania

Today's circuit design process is become a complex task. Sequential logic synthesis is an important part of the circuit design flow. The logic synthesis phase is a bottleneck during the overall design process since heuristic techniques which take a considerable amount of time are often used during this phase. A good solution is realized in a constrained design space by using global optimization techniques. The purpose of this paper is to develop a robust optimization algorithm, that searches the solution space as efficiently as possible in order to find a global optimization of the internal states of a specified circuit, as a global solution to a high level synthesis problem.

关键词： Design optimization Circuit synthesis Constraint optimization Logic design Sequential circuits Process design Automatic control computer science Robustness High level synthesis

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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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Mixed H2/H∞ and robust control of differential linear repetitive processes

Mixed H2/H∞ and robust control of differential linear repet...

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IEEE Conference on Decision and control

作者： W. Paszke K. Gakowski E. Rogers A. Kummert D.H. Owens Institute of Control and Computation Engineering University of Zielona Góra Zielona Góra Poland School of Electronics and Computer Science University of Southampton Southampton UK Faculty of Electrical University of Wuppertal Wuppertal Germany Department of Automatic Control and Systems Engineering University of Sheffield Sheffield UK

Repetitive processes are a distinct class of 2D systems (*** propagation 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 here) or 2D systems theory. Here we give new results on the design of physically based control laws and, in particular, the first results on a mixed H 2 /H ∞ approach and on H 2 control in the presence of uncertainty in the process model.

关键词： Robust control control systems Linear systems Uncertainty Writing Disk drives Process control Iterative algorithms control engineering computing computer science

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IMPROVEMENT OF FAULT DETECTION METHOD FOR NONLINEAR BLACK-BOX SYSTEMS BASED ON MULTI-FORM QUASI-ARMAX MODELING

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IFAC Proceedings Volumes 2005年第1期38卷 101-106页

作者： K. Kumamaru K. Inoue F. Tsubouchi T. Söderström Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Kawazu 680-4 Iizuka 820-8502 Fukuoka Japan Department of Automatic Control and Systems Analysis Institute of Technology Uppsala University P.O.Box 27 Uppsala Sweden

This paper is concerned with improvement of the KDI-based fault detection method so far developed by authors for nonlinear black-box systems. When modeling the system, Quasi-ARMAX model with multi-model structure is used. A fault due to unexpected change in system parameters will appear as the change of identified model. Kullback discrimination Information (KDI) can then be used as the fault detection index to evaluate the distortion in identified model. Several schemes to improve the fault detection performance are proposed, as well as the realization of a kind of fault isolation function based on a recognition approach in the model parameter space. The effectiveness of the method is verified through simulation studies on the ship propulsion system constructed for benchmark test.

关键词： Fault detection Kullback discrimination information non-linear system parameter estimation quasi-ARMAX model ship propulsion system

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The influence of feedback/feedforward control on relaxed pass profile controllability of discrete linear repetitive processes

The influence of feedback/feedforward control on relaxed pas...

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International Workshop on Multidimensional (nD) Systems

作者： L. Hladowski K. Galkowski E. Rogers A. Kummert D.H. Owens Institute of Control and Computation Engineering University of Zielona Gora Zielona Gora Poland University of Wuppertal Germany School of Electronics and Computer Science University of Southampton Southampton UK Faculty of Electrical Information and Media Engineering Communication Theory University of Wuppertal Germany Department of Automatic Control and Systems Engineering University of Sheffield Sheffield UK

Repetitive processes are a distinct class of 2D systems (i.e. information propagation 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 here) or 2D systems theory. Here we give the first results on how feedback/feedforward control action can be used to influence one form of controllability for processes with discrete dynamics.

关键词： Linear feedback control systems controllability Integrated circuit modeling control engineering computing Vectors Communication system control computer science Systems engineering and theory State-space methods Multidimensional systems

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Advanced DSP based system for image transmission over GSM/GPRS networks

Advanced DSP based system for image transmission over GSM/GP...

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12th International Workshop on Systems, Signals and Image Processing

作者： Mohorko, J Gleich, D Planinsic, P Ultra Advanced Research Center Ultra D.o.o. Co. Cesta Otona Zupancica 23a Slovenia Faculty of Electrical Engineering and Computer Science University of Maribor 2000 Maribor Gosposvetska ulica 84 Slovenia University of Maribor Slovenia Ultra D.o.o Co. Slovenia IEEE Slovenia Laboratory for Signal Processing and Remote Control University of Maribor Slovenia DLR Institute in Oberpfaffenhofen Germany SPIE

ISBN: (纸本)0907776205

In this article the development of the prototype of complex hierarchical organized sensor/control system that enables the capture and transmission of high quality images through mobile networks is described. Compression methods (codecs) for image information contents are used for effective image transfer through bandwidth limited communication channel. JPEG method is one of the implemented methods. It is the most known standard method on the field of lossy methods, but it gives poor results at high compression rations. The best compression methods are based on Wavelet transformation. In our implementation lifting scheme for a 9/7-filter bank was used to compute wavelet transform and the novel coding process and ordering of bit plane bits is presented which is comparable with a JPEG2000 codec in rate-distortion sense and has lower computational complexity as JPEG2000. A trade-off between a complexity and efficiency has been made to meet the cannel capacity of the GSM/GPPS network. Coder prototype is realized in compact DSP video module with relatively low cornputational power. Usability of the described methods is demonstrated on Internet based application 'Information system for image data collecting and distribution.

关键词： image compression wavelet transform coding internet protocol JPEG GSM GPRS DSP

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Transport of Mars-Crossing Asteroids from the Quasi-Hilda Region

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Physical Review Letters 2005年第23期94卷 231102-231102页

作者： Michael Dellnitz Oliver Junge Martin W. Lo Jerrold E. Marsden Kathrin Padberg Robert Preis Shane D. Ross Bianca Thiere Faculty of Computer Science Electrical Engineering and Mathematics University of Paderborn D-33095 Paderborn Germany Navigation and Mission Design Jet Propulsion Laboratory California Institute of Technology M/S 301-140L 4800 Oak Grove Drive Pasadena California 91109 USA Control and Dynamical Systems California Institute of Technology MC 107-81 Pasadena California 91125 USA Department of Aerospace and Mechanical Engineering University of Southern California Los Angeles California 90089 USA

We employ set oriented methods in combination with graph partitioning algorithms to identify key dynamical regions in the Sun-Jupiter-particle three-body system. Transport rates from a region near the 3∶2 Hilda resonance into the realm of orbits crossing Mars’ orbit are computed. In contrast to common numerical approaches, our technique does not depend on single long term simulations of the underlying model. Thus, our statistical results are particularly reliable since they are not affected by a dynamical behavior which is almost nonergodic (i.e., dominated by strongly almost invariant sets).

关键词： .graph orbits partitioning week ending Asteroids Preis Mars-Crossing Quasi-Hilda

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On the selection of appropriate control system design methodologies

On the selection of appropriate control system design method...

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作者： Van Willigenburg, L.G. De Koning, W.L. Chalabi, Z.S. Tchamitchian, M. Van Straten, G. Systems and Control Group Wageningen University P.O. Box 17 6700 AA Wageningen Netherlands Faculty of Electrical Engineering Delft University of Technology Mathematics and Computer Science Mekelweg 4 2628 CD Delft Netherlands Public and Environmental Health Research Unit London School of Hygiene and Tropical Medicine University of London Keppel Street London WC1E 7HT United Kingdom INRA Bioclimatologie Domaine StPaul Site Agroparc Cedex 9 84914 Avignon France

ISBN: (纸本)008045108X

We will argue in this paper that the nature and magnitude of model uncertainty dictate the appropriateness of the control system design methodology. To obtain these arguments, we will pursue optimality of the control system design. Note this is a philosophical paper, in which we present our arguments in qualitative terms. We will identify the circumstances under which several control system design methodologies are appropriate. The design methodologies that will be considered are (1) optimal control and optimal feedback design, (2) model predictive control (receding horizon control), (3) active and passive adaptive control and (4) robust control. Robust control strategies are conservative and limit the possible improvements that can be obtained over say classical PID control. However, it will turn out that for certain types of control problems, improvements in performance are indeed limited. Roughly speaking, the area where we may expect (significant) improvement from advanced (optimal) control system design is very much limited by the uncertainty of the systems model. Miracles are not to be expected from advanced control. What can be expected is reflected in an active adaptive optimal control scheme introduced and discussed in this paper. Copyright © 2005 IFAC.

关键词： Robust control

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ON THE SELECTION OF APPROPRIATE control SYSTEM DESIGN METHODOLOGIES

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IFAC Proceedings Volumes 2005年第1期38卷 115-120页

作者： L.G. Van Willigenburg W.L. De Koning Z.S. Chalabi M. Tchamitchian G. Van Straten Systems and Control Group Wageningen University P.O. Box 17 6700 AA Wageningen The Netherlands Faculty of Electrical Engineering Mathematics and Computer Science Delft University of Technology Mekelweg 4 2628 CD Delft The Netherlands University of London Public and Environmental Health Research Unit London School of Hygiene and Tropical Medicine Keppel Street London WC1E 7HT United Kingdom INRA Bioclimatologie Domaine StPaul Site Agroparc 84914 Avignon Cedex 9 France

We will argue in this paper that the nature and magnitude of model uncertainty dictate the appropriateness of the control system design methodology. To obtain these arguments, we will pursue optimality of the control system design. Note this is a philosophical paper , in which we present our arguments in qualitative terms . We will identify the circumstances under which several control system design methodologies are appropriate. The design methodologies that will be considered are (1) optimal control and optimal feedback design, (2) model predictive control (receding horizon control), (3) active and passive adaptive control and (4) robust control. Robust control strategies are conservative and limit the possible improvements that can be obtained over say classical PID control. However, it will turn out that for certain types of control problems, improvements in performance are indeed limited. Roughly speaking, the area where we may expect (significant) improvement from advanced (optimal) control system design is very much limited by the uncertainty of the systems model. Miracles are not to be expected from advanced control. What can be expected is reflected in an active adaptive optimal control scheme introduced and discussed in this paper.

关键词： controller selection model uncertainty active adaptive control adaptive dual control caution probing learning

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