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CONDITION MONITORING USING PCA BASED METHOD AND APPLICATION TO WASTEWATER TREATMENT PLANT OPERATION

IFAC Proceedings Volumes 2006年第14期39卷 208-213页

作者： K. Mazur A. Borowa M.A. Brdyś Department of Automatic Control Gdansk University of Technology ul. Narutowicza 11/12 80-952 Gdansk Poland Department of Electronic Electrical and Computer Engineering The University of Birmingham Birmingham B15 2TT UK

Monitoring of multidimensional, sophisticated processes still can be a challenge. The paper presents tools to handle such cases, which are based on the Principal Component Analysis with the adaptive enhancement. A novel PCA algorithm is derived with the adaptive supervisor. It is applied to monitoring operation of wastewater treatment plant and tested by simulation based on real data records.

关键词： Monitoring detection algorithms statistical process control frequency signal analysis multidimensional systems wastewater treatment

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GRID IMPLEMENTATION OF PARALLEL MULTIOBJECTIVE GENETIC ALGORITHM FOR OPTIMISED ALLOCATION OF CHLORINATION STATIONS IN DRINKING WATER DISTRIBUTION SYSTEMS: CHOJNICE CASE STUDY

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IFAC Proceedings Volumes 2006年第14期39卷 238-243页

作者： G. Ewald W. Kurek Mietek A. Brdys Department of Automatic Control Gdansk University of Technology ul. Narutowicza 11/12 80-952 Gdansk Poland Department of Electronic Electric and Computer Engineering The University of Birmingham Birmingham B15 2TT UK

There is a group of problems that require big amount of computing power to solve. computer grids allow building effective computing platforms at relatively low cost. It is expected that algorithms like Genetic Algorithm will perform well on the grid. In this paper, grid implementation of multiobjective distributed genetic algorithm is proposed. A distributed version of the algorithm is based on a modified island algorithm where genetic data exchange is replaced by introduced new Forgetting Island Elitism. The algorithm is applied to booster station allocation in Chojnice water distribution system.

关键词： Parallel algorithms Parallel computation Multiobjective optimizations Genetic algorithms Computing systems Decision making Quality control Environmental engineering

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OPTIMISED ALLOCATION OF CHLORINATION STATIONS BY MULTI-OBJECTIVE GENETIC OPTIMISATION FOR QUALITY control IN DRINKING WATER DISTRIBUTION SYSTEMS

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IFAC Proceedings Volumes 2006年第14期39卷 232-237页

作者： W. Kurek Mietek A. Brdys Department of Automatic Control Gdansk University of Technology ul. Narutowicza 11/12 80-952 Gdansk Poland Department of Electronic Electric and Computer Engineering The University of Birmingham Birmingham B15 2TT UK

Providing water meeting strict quality conditions is now a number one priority for the water authorities. Water chlorination only at water treatment plants forced the usage of high concentration of disinfectant which resulted in bad taste of water near them and still did not solve the quality issues at the far points of the network. The answer to this problems is booster chlorination - placing booster station throughout the network allowing a significant reduction of chlorine concentration and at the same time ensuring proper water quality in the network. The booster chlorination is highly dependent from the demand scenarios.

关键词： Multiobjective optimizations Genetic algorithms Decision making Optimization problems Quality control Environmental engineering

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MODELLING OF WASTEWATER TREATMENT PLANT FOR MONITORING AND control PURPOSES BY STATE - SPACE WAVELET NETWORKS

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IFAC Proceedings Volumes 2006年第14期39卷 250-255页

作者： A. Borowa M.A. Brdyś K. Mazur Department of Automatic Control Gdansk University of Technology ul. G. Narutowicza 11/12 80 952 Gdansk Poland School of Engineering Department of Electronic Electrical and Computer Engineering The University of Birmingham Birmingham B15 2TT UK

Most of industrial processes are nonlinear, not stationary, and dynamical with at least few different time scales in their internal dynamics and hardly measured states. A biological wastewater treatment plant falls into this category. The paper considers modelling such processes for monitorning and control purposes by using State - Space Wavelet Neural Networks (SSWN). The modelling method is illustrated based on bioreactors of the wastewater treatment plant. The learning algorithms and basis function (multidimensional wavelets) are also proposed. The simulation results based on real data record are presented.

关键词： Neural network models Model approximation Learning algorithms Waste treatment

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Robustness and Performance Evaluation of the Fuzzy Texture Spectrum encoding

Robustness and Performance Evaluation of the Fuzzy Texture S...

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IEEE International Conference on Fuzzy Systems (FUZZ-IEEE)

作者： A. Barcelo P. Sobrevilla E. Montseny Center of Research in Biomedical Engineering Technical University of Catalonia Barcelona Spain Applied Mathematics Department Technical University of Catalonia Barcelona Spain Computer Engineering and Automatic Control Department Technical University of Catalonia Barcelona Spain

In a previous work we introduced the fuzzy texture spectrum (FTS) as a texture spectrum (TS)-based method wherein, for capturing the ambiguity of texture definitions and texture features variability of real images, unlike the original method the concepts of equal, greater, and smaller grey-levels were considered as fuzzy sets. In this paper both methods are analyzed and compared for robustness evaluation. To compare the FTS and the TS for texture characterization an entropy measure and a similarity-discriminatory criterion are considered for performance and robustness evaluation. Moreover, to make the fuzzy texture spectrum rotations invariant, texture units are grouped into classes.

关键词： Robustness Encoding Histograms Fuzzy sets Humans Biomedical engineering Entropy Statistics Image texture analysis Stochastic processes

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Robust adaptive sliding mode control for uncertain time-delay systems

Robust adaptive sliding mode control for uncertain time-dela...

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American control Conference (ACC)

作者： Yuanqing Xia S.S. Ge G.P. Liu P. Shi D. Rees Faculty of Advanced Technology University of Glamorgan Pontypridd UK Department of Automatic Control Beijing Institute of Technology Beijing China Faculty of Department of Electrical & Computer Engineering National University of Singapore Singapore

This paper is devoted to robust adaptive sliding mode control for time-delay systems with mismatched parametric uncertainties. Sufficient conditions for the existence of linear sliding surfaces are given in terms of m... 详细信息

关键词： Robust control Programmable control Adaptive control Sliding mode control Uncertainty control systems Motion control Sufficient conditions Electric variables control Linear matrix inequalities

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On the design and control of wireless networked embedded systems

On the design and control of wireless networked embedded sys...

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IEEE International Conference on computer-Aided Design

作者： Karl-Erik Arzen Antonio Bicchi Stephen Hailes Karl H. Johansson John Lygeros Department of Automatic Control Lund University Sweden Centro E. Piaggio University of Pisa Italy Department of Computer Science University College London UK School of Electrical Engineering Royal Institute of Technology Stockholm Sweden Department of Electrical and Computer Engineering University of Patras Greece

Wireless networked embedded systems are becoming increasingly important in a wide area of technical fields. In this tutorial paper we present recent results on the design of these systems and their use in control applications, that have been developed within the project Reconfigurable Ubiquitous Networked Embedded Systems (RUNES). RUNES is a European Integrated Project with the aim to control complexity in networked embedded systems by developing robust and scalable middleware systems. New components for control under varying network conditions are discussed for the RUNES architecture. The paper highlights how the complexity of the closed-loop system is increased, due to additional disturbances introduced by the communication system: additional delays, jitter, data rate limitations, packet losses, etc. Experimental work on integration test beds that demonstrates these results is presented, together with motivating links to the RUNES disaster relief tunnel scenario

关键词： control systems Embedded system Communication system control Fires Networked control systems Testing Middleware Added delay Jitter Mobile robots

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Delay dependent fault estimation for uncertain time delay nonlinear systems: an LMI approach

Delay dependent fault estimation for uncertain time delay no...

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American control Conference (ACC)

作者： Sing Kiong Nguang Peng Shi S. Ding The Department of Electrical and Computer Engineering University of Auckland New Zealand School of Technology University of Glamorgan Pontypridd UK Institute for Automatic Control and Complex Systems (AKS) Faculty of Engineering University of Duisburg-Essen Duisburg Germany

This paper deals with the problem of robust fault estimation for uncertain time delay Takagi-Sugeno (TS) fuzzy models. The aim of this study is to design a delay dependent fault estimator ensuring a prescribed H infin performance level for the fault estimation error, irrespective of the uncertainties and the time delays. Sufficient conditions for the existence of a robust fault estimator are given in terms of linear matrix inequalities. Membership functions'(MFs) characteristics are incorporated into the fault estimator design to reduce the conservativeness of neglecting these characteristics

关键词： Delay effects Delay estimation Nonlinear systems Fuzzy systems Fault detection Robustness Uncertainty Estimation error Sufficient conditions Linear matrix inequalities

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Output feedback/feedforward control of discrete linear repetitive processes for performance and disturbance rejection

Output feedback/feedforward control of discrete linear repet...

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American control Conference (ACC)

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

Repetitive processes propagate information in two independent directions and are of both systems theoretic and applications interest. They cannot be controlled by direct extension of existing techniques from either standard (termed ID here) or 2D systems theory. Here we give new results on the design of physically based feedforward/feedback control laws to achieve desired performance and disturbance decoupling in the sense defined in the body of the paper. The new results are for the case when only output (as opposed to state) information is used to activate the control law

关键词： Output feedback Linear feedback control systems control systems Optimal control Process control Linear systems Stability Feedback control Algorithm design and analysis Iterative algorithms

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DELAYED FEEDBACK control: A SURVEY AND SOME NEW RESULTS

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IFAC Proceedings Volumes 2006年第8期39卷 36-41页

作者： Yu-Ping Tian Jiandong Zhu Guanrong Chen Department of Automatic Control Southeast University Nanjing 210096 P.R.China School of Mathematics and Computer Science Nanjing Normal University Nanjing P. R. China Department of Electronic Engineering City University of Hong Kong P. R. China

This paper presents the basic idea and the mathematical formulation of the delayed feedback control (DFC) methodology. Stability analysis including the well-known odd number limitation of the DFC is reviewed. Some new advances in characterization of the limitation of the DFC are presented. Finally, some open problems in this research field are discussed.

关键词： Delayed feedback control Chaos control Stability Chaotic system

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