Control of Unstable Delayed Multivariable Systems

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Alamolhoda, Fatemeh | 2009

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 40168 (06)
University: Sharif University of Technology
Department: Chemical and Petroleum Engineering
Advisor(s): Shahrokhi, Mohammad
Abstract:
Existence of time delay and interactions of control loops make control of multivariable delayed systems more difficult، therefore control of these systems is important. In this project a control scheme based on prediction of process output has been proposed. Traditional PI controllers are used in the control structure and controller parameters are tuned by genetic algorithm. Unlike the Smith predictor based methods، which become internally unstable when applied to unstable plants، unstable delayed multivariable systems can be handled by proposed method. It can also be applied to stochastic systems. The robust version of the control scheme has also been designed. Effectiveness of the proposed scheme is illustrated through computer simulation.
Keywords:
Time Delay ; Multiple Input Multiple Output (MIMO)System ; Genetic Algorithm ; Robust Control ; Unstable Processes

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