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

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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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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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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Measurement system for data acquisition and electric arc furnace characteristic calculation

Measurement system for data acquisition and electric arc fur...

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2004 IFAC Workshop on Programmable Devices and Systems, PDS 2004

作者： Kazala, Robert Wcislik, Miroslaw Kielce University of Technology Faculty of Electrical Engineering Automatic Control and Computer Science Al. 1000-lecia PP7 Kielce25-314 Poland

The paper presents the requirements of measurement system for electric arc furnace parameters measurement and for working characteristic calculating. On this basis measurement signals were specified and measurement algorithms were developed. For data acquisition a special system was constructed. The system consists of portable computer with acquisition card and conditioning system with differential amplifiers, antialiasing filters and sample and hold circuits. The system is connected with interface build-up permanent in arc furnace. The system software makes possible on-line observation of measured signals values and save data to hard disk. Further calculations may be performed off-line using special developed algorithms. For system software development the open source Python language and GCC compiler for Windows were used. © 2004 IFAC.

关键词： Data acquisition

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A11: Measurement system for data acquisition and electric arc furnace characteristic calculation

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IFAC Proceedings Volumes 2004年第20期37卷 64-69页

作者： Robert Kazala Miroslaw Wcislik Kielce University of Technology Faculty of Electrical Engineering Automatic Control and Computer Science Al. 1000-lecia PP7 25-314 Kielce Poland

关键词： arc furnace data acquisition control system hardware algorithms

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Bounding Approach to Parameter Estimation without Priori Knowledge on Model Structure Error

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IFAC Proceedings Volumes 2004年第11期37卷 221-226页

作者： Tao Chang Kazimierz Duzinkiewicz Mietek Brdys Department of Electronic Electrical and Computer Engineering The University of Birmingham Birmingham B15 2TT UK Fax: +44 121 414 4291. Department of Control Engineering Faculty of Electrical Engineering and Automatic Control Gdansk University of Technology ul. G.Namtowicza 11 12 80-952 Gdansk Poland.

Parameter estimation of an autoregressive movmg average (ARMA) model is discussed in this paper by using bounding approach. Bounds on the model structure error are assumed unknown, or known but conservative. To reduce this conservatism, a point-parametric model concept is proposed, where there exist a set of model parameters and structure error corresponding to each input. Feasible parameter sets are defined for point-parametric model. Bounded values on the model parameters and structure error can then be computed jointly by tightening the feasible set using observations under deliberately designed input excitations. Finally, a constantly bounded parameter model is established, which can be used for robust control.

关键词： modelling errors bounding method parameter estimation uncertain dynamic systems robust control

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Modeling Demand for Inventory Management of Slow-Moving Items in Case of Reporting Errors

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IFAC Proceedings Volumes 2004年第4期37卷 27-32页

作者： Alexandre Dolgui Anatoly Pashkevich Maxim Pashkevich Scientific Methods for Industrial Management Dept. (MSGI) Industrial Engineering and Computer Sciences Center (G2I) Ecole de Mines de Saint Etienne 158 Cours Fauriel 42023 Saint Etienne France Robotic Laboratory Department of Automatic Control Belarusian State University of Informatics and Radioelectronics 6 P.Brovka St. Minsk 220027 Belarus Department of Mathematical Modeling and Data Analysis Faculty of Applied Mathematics and Computer Science Belarusian State University Skarina Av. 4 Minsk 220050 Belarus

The paper is devoted to the problem of modeling demand for inventory management of slow-moving items in the case of reporting errors. It is proposed a generalization of the beta-binomial demand model that takes into account possible reporting errors in the learning sample. For the new model, there are developed identification and forecasting algorithms that provide consistent estimators of the model parameters and mean square optimal forecasts. The efficiency of the proposed approach is illustrated by an application example for slow-moving car parts.

关键词： inventory control error correction statistical inference parameter estimation prediction methods

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Database technology and industrial transaction techniques in control education 6

Database technology and industrial transaction techniques in...

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6th IFAC Symposium on Advances in control Education, ACE 2003

作者： Flochova, Jana Galbavy, Miroslav Department of Automatic Control Systems Department of Computer Science Faculty of Electrical Engineering and Information Technology Slovak University of Technology Ilkovicova 3 Bratislava81219 Slovakia

New developments in computer networks and communications provide new possibilities for control purposes. control systems for highly complex plants are themselves very complex and heterogeneous. A new software infrastructure is needed that exploits these new emerging software technologies. An essential activity to be pursued is that of education and of including new technology in control education. The aim of this paper is to describe some of our activities and experiences in teaching of information techniques and technologies included in open control platforms of complex control systems. Copyright © IFAC Advances in control Education Oulu, Finland, 2003

关键词： Information management

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Minimizing The Overhead Cost of Distributed Object-Oriented Software Remapping 16

Minimizing The Overhead Cost of Distributed Object-Oriented ...

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16th International Conference on Parallel and Distributed Computing Systems, PDCS 2003

作者： Fergany, Tahany A. Faheem, Mohamed T. Sarhan, Amany Computer Science Department School of Engineering and Applied Science University of New Haven West HavenCT06516 United States Department of Computer Science and Automatic Control Faculty of Engineering Tanta University Tanta Egypt

ISBN: (纸本)9781618398161

This paper represents a new technique for remapping the distributed object-oriented software methods to target architecture. This technique takes into consideration the advantages of the structure inherit in object-oriented to develop a better software assignment that improves the overall performance by minimizing the resources' cost. The cost of updating objects' copies is also presented as a significant factor when evaluating the cost objective ftinction. A new queuing model is developed to accurately describe the behavior of the object-oriented software at any node. This research also utilizes the simulated annealing algorithm to find out the best possible map of the software methods to the target architecture. The results show a significant improvement in the total resources cost and hence the overall system performance. © PDCS 2003. All rights reserved.

关键词： Real time systems

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Using time dependent variables for hazard analysis

Using time dependent variables for hazard analysis

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Canadian Conference on Electrical and computer engineering (CCECE)

作者： N. Galupa Faculty of Automatic Control and Computer Engineering Technical University Iasi Romania

The present paper considers the problem of hazard in combinatorial logic structures . We start from time constants method but we shall prove that this is not error free (there are situations when this method fails to point hazards in a combinatorial logic circuit). So we shall define an improvement for this method, improvement that will consider, among other features, the specific function implemented by the gates used (we are mostly interested by the inverting characteristic). In this endeavor we shall define a new type of operator and a new type of variable, both of them applicable when propagating the switching times for a specific circuit. The mentioned method is a very laborious one (considers all the possibilities disregarding the specific function implemented by a circuit). We shall prove that only a strictly limited number of situations should be considered in conjunction with the function that is being implemented by the circuit analyzed. In order to achieve this goal we shall express the logic function with respect to a new logic variable that is dependent by time. Operations with this new variable prove to have some very interesting properties (that we prove in the paper) that will allow us to restrain the window of possibilities of hazardous functioning to a very narrow one.

关键词： Hazards Propagation delay Logic circuits automatic control control engineering computing automatic logic units computer errors Error correction Switching circuits Circuit analysis

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