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2007 International Conference on Intelligent and Advanced systems, ICIAS 2007

作者： Mat Darus, I.Z. Mohd. Hashim, S.Z. Tokhi, M.O. Fakulti Kejuruteraan Mekanikal Universiti Teknologi Malaysia Fakulti Sains Komputer Dan Sumber Maklumat Universiti Teknologi Malaysia Department of Automatic Control and System Engineering University of Sheffield

ISBN: (纸本)1424413559

This paper presents the development of an interactive learning environment for dynamic simulation and active vibration control of flexible plate structures. The work is aimed to facilitate the learning process of the subject area through the development of an interactive environment that can help users to simulate and visualise behaviour of flexible structures with given physical characteristics, to test and validate controller designs. Simulation algorithms based on finite difference scheme in characterizing the dynamic behaviour of a two-dimensional such as plate structures are incorporated. controller design strategies are integrated within this framework. The design and implementation of the interactive learning system incorporating the simulation algorithms, modelling and control strategies, are developed using Matlab. The result of the simulation is further utilized in the modelling and control of the specified flexible plate structure. ©2007 IEEE.

关键词： Flexible structures

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Modelling and simulation of a beet pulp dryer

Modelling and simulation of a beet pulp dryer

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4th International Mediterranean Modeling Multiconference, I3M 2007

作者： Merino, A. Alves, R. Acebes, L.F. De Prada, C. Center of Sugar Technology University of Valladolid Edificio Alfonso VIII 47011 Valladolid Spain Department of System Engineering and Automatic Control University of Valladolid Escuela Universitaria Politécnica C/ Francisco Mendizábal no 1 47014 Valladolid Spain

ISBN: (纸本)8890073268

The purpose of drying is to eliminate a liquid sub-stance from a solid matrix through evaporation by supply of heat. In the case of the pulp dryers used by the sugar in-dustry, the purpose is to evaporate the water in the sugar beet pulp after its sucrose has been removed. This dry pulp is a sub product used as food for cattle. This paper deals with the modeling and simulation of a pulp dryer in order to improve the knowledge of its inner behavior and to include the developed models in a training simulator. For achieve this objectives the paper has been divided as follows. First a process description is made, second the main modeling considerations have been de-scribed, finally, the paper will show the integration of the developed model in a training simulator for plant operators including the main malfunctions related with the drying process.

关键词： Drying

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Spatiotemporal Analysis of an Agent-Based Model of a Colony of Keratinocytes: A First Approach for the Development of Validation Methods

Spatiotemporal Analysis of an Agent-Based Model of a Colony ...

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IEEE Symposium on Bioinformatics and Bioengineering (BIBE)

作者： Cesar Pichardo-Almarza Rod Smallwood S. A. Billings Department of Computer Science University of Sheffield Sheffield UK Department of Automatic Control and System Engineering University of Sheffield Sheffield UK

Agent-based models are widely used for the simulation of systems from several domains (biology, economics, meteorology, etc). In biology agent-based models are very useful for predicting the social behaviour of systems; in particular they seem well adapted to model the behaviour of a cell population. In this paper an agent-based model, developed to study normal human keratinocytes (tissue cells), will be investigated. This kind of model exhibits probabilistic behaviour and the validation of simulation results is often done with a qualitative analysis by the experts (biologists). The main objective of this paper is to propose new variables and metrics that allow the comparison and a possible quantitative validation using numerical results from simulations.

关键词： Spatiotemporal phenomena Biological system modeling Cells (biology) systems biology Computational biology Predictive models Economic forecasting Meteorology Humans Analytical models

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Subspace-based blind identification of IIR Wiener systems

Subspace-based blind identification of IIR Wiener systems

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15th European Signal Processing Conference, EUSIPCO 2007

作者： Gómez, Juan C. Baeyens, Enrique Laboratory for System Dynamics and Signal Processing FCEIA Universidad Nacional de Rosario Riobamba 245 Bis 2000 Rosario Argentina Department of Systems Engineering and Automatic Control ETSII - Universidad de Valladolid Paseo del Cauce s/n 47011 Valladolid Spain

ISBN: (纸本)9788392134022

A new subspace method for the blind (i.e., based only on output data) identification of Single Input Single Output Wiener models is presented in this paper. The Wiener model consists of the cascade of a Linear Time Invariant (LTI) system followed by a zero-memory nonlinear element. The linear block in the Wiener model is given an Infinite Impulse Response (IIR) representation using orthonormal bases with fixed poles, while the static nonlinearity is represented using nonlinear basis functions. Basis coefficients (both of the linear and nonlinear blocks) are estimated in closed form, up to a scalar factor, by first computing the column space of an equivalent output Hankel matrix using Singular Value Decomposition (SVD), and then solving two Least Squares problems also resorting to SVDs. The performance of the proposed algorithm is illustrated through a simulation example. © 2007 EURASIP.

关键词： Singular value decomposition

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On the application of recurrent neural network techniques for detecting instability trends in an industrial process

On the application of recurrent neural network techniques fo...

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International Conference on Emerging Technologies and Factory Automation (ETFA)

作者： Eva Portillo Itziar Cabanes Marga Marcos Asier Zubizarreta Department of Automatic Control and System Engineering E. T. S. I. de Bilbao Bilbao Spain

This paper analyses the use of the recurrent neural network approach to diagnose degraded cutting regimes in wire electrical discharge machining (WEDM) Process. The main objective of this work is to detect in advance the degradation of the cutting process since this can lead to the breakage of the cutting tool (the wire), reducing the process productivity and the required accuracy. Besides, the quantification of the grade of influence of different types of degraded behaviours is meant in this work. In order to achieve all these challenges, a configuration of three Elman neural networks has been selected due to the memorization capability and the dynamic character of the Elman architecture. Each network is dedicated to specific process functions. The results of this work show a satisfactory performance of the presented approach.

关键词： Recurrent neural networks Machining Degradation Wire Neural networks systems engineering and theory Electrodes Dielectrics Productivity Ionization

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Interactive learning framework for dynamic simulation and control of a two dimensional flexible plate structure

Interactive learning framework for dynamic simulation and co...

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International Conference on Intelligent and Advanced systems, ICIAS

作者： I. Z. Mat Darus S. Z. Mohd. Hashim M. O. Tokhi Fakulti Kejuruteraan Mekanikal Universiti Teknologi Malaysia Fakulti Sains Komputer dan Sumber Maklumat Universiti Teknologi Malaysia Department of Automatic Control and System Engineering University of Sheffield UK

关键词： Process control Flexible structures automatic voltage control Mathematical model Vibrations Adaptation model Adaptive systems

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control system DESIGN CONSIDERING A TRADEOFF BETWEEN EVALUATED UNCERTAINTY RANGES AND control PERFORMANCE

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Asian Journal of control 2008年第1期1卷

作者： Y. Wakasa Y. Yamamoto Dept. of Applied Analysis and Complex Dynamical Systems Graduate School of Informatics Kyoto University Kyoto Japan. Yuji Wakasa was born in Okayama Japan in 1968. He received the B.S. and M.S. degrees in engineering from Kyoto university Japan in 1992 and 1994 respectively. From 1994 to 1998 he was a Research Associate in the Department of Information Technology Okayama University. Since April 1998 he has been a Research Associate in the Graduate School of Informatics Kyoto University. His current research interests include robust control and control system design via mathematical programming. Yutaka Yamamoto received his B.S. and M.S. degrees in engineering from Kyoto University Kyoto Japan in 1972 and 1974 respectively and the M.S. and Ph.D. degree in mathematics from the University of Florida in 1976 and 1978 respectively. From 1978 to 1987 he was with Department of Applied Mathematics and Physics Kyoto University and from 1987 to 1997 with Department of Applied System Science. Since 1998 he is a professor at the current position. His current research interests include realization and robust control of distributed parameter systems learning control sampled-data systems and digital signal processing. Dr. Yamamoto is a receipient of the Sawaragi memorial paper award (1985) the Outstanding Paper Award of SICE (1987) Best Author Award of SICE (1990) the George Axelby Outstanding Paper Award of IEEE CSS in 1996 Takeda Paper Prize of SICE in 1997. He is a Fellow of IEEE. He was an associate editor of Automatica. He is currently an associate editor of IEEE Transactions on Automatic Control Systems and Control Letters and Mathematics of Control Signals and Systems. He is a member of the IEEE the Society of Instrument and Control Engineers (SICE) and the Institute of Systems Control and Information Engineers.

This paper presents a design method of control systems such that a designer can flexibly take account of tradeoffs between evaluated uncertainty ranges and the level of control performance. The problem is reduced to a BMI problem and approximately solved by LMIs. The convergence of the proposed approximation is proved in a modified sense. A numerical example shows the effectiveness of the proposed method in comparison with the standard robust control.

关键词： control system design LMI BMI tradeoff curves

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Speed sensorless control with neuron MARS estimator of an induction machine

Speed sensorless control with neuron MARS estimator of an in...

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2006 2nd International Conference on Power Electronics systems and Applications, ICPESA

作者： Lei, Dong Dong, Yang Xiaozhong, Liao Department of Automatic Control Engineering Beijing Institute of Technology Beijing China Key Laboratory of Complex System Intelligent Control and Decision Ministry of Education Beijing China

ISBN: (纸本)9623675445

In the high speed range, vector control of rotor flux orientation of an induction machine implements good perfornance. However, the perfornance in low speed rang deteriorates because of the inaccurate estimation of rotor flux and speed. In this paper, modified voltage model for rotor flux estimation and neuron model-reference adaptive system (MARS) for speed estimation are used to improve the perfornance of speed sensorless vector control. To improve the accuracy of rotor flux estimation, the stator resistance is identified on-line. The experimental results show that the proposed scheme yields improved perfornance in low speed range.

关键词： Induction machine

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A simulation based decision tool to coordinate emergency services in a road accident

A simulation based decision tool to coordinate emergency ser...

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Summer Computer Simulation Conference 2006, SCSC 2006, Part of the 2006 Summer Simulation Multiconference, SummerSim 2006

作者： Guimarans, D. Ramos, J.J. Piera, M.A. Guasch, A. Department of Telecommunication and System Engineering LogiSim Universitat Autònoma de Barcelona 08193 Bellaterra Spain Department of System Engineering and Automatic Control LogiSim Universitat Politecnica de Catalunya 08028 Barcelona Spain

ISBN: (纸本)9781622763528

The coordination of emergency services in road accidents is essential to ensure a quick intervention in critical situations. The number and kind of resources assigned must be determined dynamically, as not all the accident variables are known when an alert is received. In addition, some decisions can only be token at the accident scene and may affect emergency service's distribution. This paper presents the model and the laboratory environment that is being developed for the design of real-time decision tools for the coordination of emergency services. Furthermore, it describes the major characteristics of an optimization algorithm proposed to tackle the emergency services coordination problem. This algorithm combines heuristic methods and Constraint Satisfaction Problem techniques in a two interactive phases procedure.

关键词： Emergency services

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Drinking water distribution system modelling - An approach to skeletonization

Drinking water distribution system modelling - An approach t...

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1st IFAC Workshop on Applications of Large Scale Industrial systems, ALSIS'06

作者： Duzinkiewicz, K. Ciminski, A. Department of Automatic Control Technical University of Gdansk ul. G. Narutowicza 11/12 80-952 Gdansk Poland Department of Control Engineering Intelligent Decision Support and Control System Group Gdansk University of Technology Narutowicza 11/12 80-952 Gdansk Poland

ISBN: (纸本)9783902661159

An optimisation based approach to simplification of a network model of pressurized drinking water distribution systems (DWDS), called skeletonization, has been proposed. DWDS simulation has been improved considerably during the last decades. There are two major aspects in modelling, monitoring and control of DWDS: quantity (water hydraulics) and quality. In the following paper the modelling of the water hydraulics in DWDS is considered. There is a need to build a simplified model of the drinking water network that preserves relation between flows and pressures in the main pipes and contains elements essentials for control - tanks, pumps, valves or others. The degree of simplification should be a compromise between needed model's accuracy and computational efficiency of the monitoring and control algorithms. Different approaches are proposed for DWDS model simplification. In the proposed method some parts of the network structure remain unchanged and the others are replaced by a simple radial structure. Parameters of the radial structure are calculated by solving dedicated optimisation problem. The simplification results based on the proposed method are illustrated by simulation case study for physical drinking-water distribution system and a comparison with the result obtained based on common sense method are presented. Copyright © 2006 IFAC.

关键词： Computational efficiency

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