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2004 IFAC Workshop on Programmable Devices and Systems, PDS 2004

作者： Kasik, Vladimir Department of Measurement and Control Faculty of Electrical Engineering and Computer Science VSB Technical University Ostrava Ostrava Czech Republic

This paper presents a framework design solution for parallel computing digital systems design. The framework uses the Simulink software as a standard design entry tool. The key role in the Framework design plays the netlist compiler, which is a stand-alone programm, created in C++. The framework assumes to be used for creating the parallel systems with distributed memory and can be targetted to powerful FPGA devices. So the computing systems designed in the Framework are naturally synchronnous and the language finally used for describing the system is the VHDL. The Simulink software together with a designed netlist compiler constitutes an Integrated Development Environment (IDE). © 2004 IFAC.

关键词： Timing circuits

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Bounding approach to parameter estimation without priori knowledge on model structure error 10

Bounding approach to parameter estimation without priori kno...

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10th IFAC/IFORS/IMACS/IFIP Symposium on Large Scale Systems: Theory and Applications, LSS 2004

作者： Chang, Tao Duzinkiewicz, Kazimierz Brays, Mietek Department of Electronic Electrical and Computer Engineering University of Birmingham BirminghamB15 2TT United Kingdom Department of Control Engineering Facility of Electrical Engineering and Automatic Control Gdansk University of Technology ul. G.Namtowicza 11/12 Gdansk80-952 Poland

Parameter estimation of an autoregressive moving 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 mode) 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. © 2004 IFAC.

关键词： Robust control

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An overview of software cybernetics 11

An overview of software cybernetics

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11th Annual International Workshop on Software Technology and engineering Practice, STEP 2003

作者： Cai, Kai-Yuan Cangussu, J.W. DeCarlo, R.A. Mathur, A.P. Department of Automatic Control Beijing University of Aeronautics and Astronautics Beijing100083 China Department of Computer Science University of Texas at Dallas RichardsonTX75083-0688 United States Department of Electrical and Computer Engineering Purdue University West LafayetteIN47907-1398 United States Department of Computer Science Purdue University West LafayetteIN47907-1398 United States

ISBN: (纸本)0769522181

Software cybernetics explores the interplay between software and control and is motivated by the fundamental question whether or not and how software behavior can be controlled. In this paper, we formulate the underlying motivations and ideas of software cybernetics and review various existing research topics in this emerging area, including feedback mechanisms in software processes, bisimulation and controllability, adaptive software, software synthesis, software test process control, and adaptive testing. We identify software rejuvenation and performance control, software fault-tolerance, logical foundation for control systems, and communication complexity for control systems as potential research topics. Several on-going research projects are also summarized. © 2004 IEEE.

关键词： Feedback

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Sub-nyquist nonuniform sampling and perfect reconstruction of signals

Sub-nyquist nonuniform sampling and perfect reconstruction o...

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Proceedings of 2004 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2004

作者： Lee, Heyoung Bien, Zeungnam Department of Control and Instrumentation Engineering Seoul National University of Technology Seoul 139-743 Korea Republic of Department of Electrical Engineering and Computer Science KAIST Taejon 305-701 Korea Republic of

ISBN: (纸本)0780386396

The sub-Nyquist nonuniform sampling (SNNS) scheme and the corresponding perfect reconstruction formula are addressed. Also, a condition to enable the perfect reconstruction of the continuous-time signal from its nonuniform samples is derived. The average sampling rate of the proposed SNNS method is less than or equal to the sampling rate of the Nyquist uniform sampling method. © 2004 IEEE.

关键词： Signal reconstruction

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Discussion on: "Robust H∞ control for uncertain fuzzy neutral delay systems"

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European Journal of control 2004年第4期10卷 382-383页

作者： Jeung, Eun Tae Park, Hong Bae Department of Control and Instrumentation Engineering Changwon National University 9 Sarimdong Changwon Kyungnam 641-773 Korea Republic of School of Electrical Engineering and Computer Science Kyungpook National University Daegu 702-701 Korea Republic of

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Intelligent control structure for control of integrated wastewater systems 10

Intelligent control structure for control of integrated wast...

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10th IFAC/IFORS/IMACS/IFIP Symposium on Large Scale Systems: Theory and Applications, LSS 2004

作者： Grochowski, M. Brdys, M.A. Gminski, T. Department of Automatic Control Gdansk University of Technology ul G. Narutowicza 11/12 Gdansk80 952 Poland School of Engineering Department of Electrical Electronic and Computer Engineering University of Birmingham BirminghamBIS 2TT United Kingdom

The paper proposes an approach to design a structure for control of integrated wastewater treatment plant-sewer system under full range of disturbance inputs. The control activities are hierarchically structured into a multilevel-multilayer Form A newly developed robust Model Predictive control method for uncertain and outpul constrained dynamic systems is a key control technology employed at Optimising control Level This level is further decomposed into control layers operating at different time scales slow, medium and fast Appropriate models for control purposes is described Needed data are delivered by measuring system and Extended Kalman Filter. A Supervisory control Level is located at a top of the control hierarchy. © 2004 IFAC.

关键词： Decision making

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Estimation of wastewater treatment plant state for model predictrve control of N-P removal at medium time scale 10

Estimation of wastewater treatment plant state for model pre...

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10th IFAC/IFORS/IMACS/IFIP Symposium on Large Scale Systems: Theory and Applications, LSS 2004

作者： Brdys, Mietek A. Chang, Tao Konarczak, Karail School of Engineering Department of Electronic Electrical and Computer Engineering University of Birmingham BirminghamB15 2TT United Kingdom Department of Automatic Control Technical University of Gdansk ul.G.Narutowicza 1112 Gdansk80 952 Poland

State estimates are needed for optimising model predictive control of nitrogen and phosphorous removal in a wastewater treatment plant due to limited state measurements available. The MPC optimiser to implement an information feedback from the plant uses the estimates. Parameters of a grey box model used by MPC for the output prediction purposes need to be updated as well. The stale estimates are then used, as pseudo measurements of the states by the parameter estimation algorithm. Otherwise the joint state and parameter estimation does not provide needed accuracy due to limited measurement programme. The paper applies extended Kalman filter to the plant model that is based on ASM2d model of the biological reactor. The estimator is tested by simulation on a benchmark producing encouraging results. © 2004 IFAC.

关键词： Extended Kalman filters

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Softly switched model predictive control for control of integrated wastewater treatment systems at medium time scale 10

Softly switched model predictive control for control of inte...

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10th IFAC/IFORS/IMACS/IFIP Symposium on Large Scale Systems: Theory and Applications, LSS 2004

作者： Grochonski, M. Brdys, M.A. Gminski, T. Deinrych, P. Department of Automatic Control Gdansk University of Technology ul G Narutowicza 11/12 Gdansk80 952 Poland School of Engineering Department of Electrical Electronic and Computer Engineering University of Birmingham BirminghamB15 2TT United Kingdom

Difficulties occui when one universal control strategy attempts controlling a plant that is under wide range of operating conditions In order to best adopt the control strategy to existing conditions three operational slates: normal, disturbed and emergency are distinguished and the corresponding control strategies are designed Appearance of different control strategies at hand enforces finding a mechanism to switch between them. It can be done in a hard or a soft manner. In case of wastewater systems the second solution is preferable The paper describes two methods of soft switching between control strategies based on Model Predictive control (MPC) as a control technology Supervisory control Level (SuCL) mounted at the top of hierarchical multilevcl-multiiaycr control structure is responsible for the conducting the switching process. The switching instants, switching time and way of switching are parameters to be selected by the SuCL The soft switching concepts were examined based on wastewater system in Kartuzy, Poland. © 2004 IFAC.

关键词： Model predictive control

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Supervisory control of integrated wastewater treatment systems 10

Supervisory control of integrated wastewater treatment syste...

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10th IFAC/IFORS/IMACS/IFIP Symposium on Large Scale Systems: Theory and Applications, LSS 2004

作者： Grochowski, M. Brdys, M.A. Duzinkiewicz, K. Langowski, R. Department of Automatic Control Gdansk University of Technology ul G. Xanttowcza 11/12 Gdansk80952 Poland School of Engineering Department of Electrical Electronic and Computer Engineering University of Birmingham BirminghamB15 2TT United Kingdom

control of integrated wastewater treatment plant-sewer systems under full range of disturbance inputs enforces employing advanced optimising control algorithms. The control activities are hierarchically structured into a multilevel-multilayer form. Model Predictive control is chosen as a core control technology As it is impossible to handle sufficiently well all operating conditions of this system, the operating states of the system are distinguished and these are: normal, disturbed and emergency Formulation of operational states requires introducing the concepts of the core and secondary objectives that divide the system objectives into obligatory and additionally ones Different control trajectories are designed for corresponding operational states in order to best adopt control actions to current plant conditions. In order to effectively control such complex system the Supervisory Level (SuCL) is introduced. Its main functionality is: to coordinate activities of the control structure, to asses operational states of the system, to asses selection of the control strategies, to asses imposed control setpoints realisation and risk of not fulfilling the objectives. Paper describes units adjacent to SuCL that major function is to provide the information needed by the SuCL and decision making process. © 2004 IFAC.

关键词： Decision making

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Weighted least squares parameter estimation for model predictive control of integrated wastewater systems at medium time scale 10

Weighted least squares parameter estimation for model predic...

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10th IFAC/IFORS/IMACS/IFIP Symposium on Large Scale Systems: Theory and Applications, LSS 2004

作者： Konarczak, K. Rutkowski, T. Brdys, M.A. Gmiriski, T. Department of Automatic Control Gdansk University of Technology ul .G. Narutowicza 11/12 Gdansk80-952 Poland School of Engineering Department of Electronic Electrical and Computer Engineering University of Birmingham BirminghamB15 2TT United Kingdom

The paper presents formulation and implementation of Weighted Least Squares algorithm with moving measurement window for a grey box model parameters estimation purposes. The grey box of a biological reactor dynamics is used by Model Predictive controller to control integrated wastewater treatment system at medium time scale. The parameter estimation Weighted Least Squares algorithm is validated by simulation based on recently developed and calibrated model of integrated wastewater treatment system in Kartuzy, Poland. © 2004 IFAC.

关键词： Parameter estimation

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