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Performance Assessment of Modeling, Control and Optimization Techniques for Discrete Event System

Hassanpour, Hesam | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 46766 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Bozorgmehry Boozarjomehry, Ramin
  7. Abstract:
  8. Hybrid systems are the systems that in addition to their dependency on time, the occurrence of variouis events paly a vital role in their dynamic behavior. These systems inherit the characteristics of two inherently different categories of the dynamic systems which are: a) the continuous-variable dynamic systems; and b) discrete-event systems. Many systems in science and engineering can be considered as hybrid systems; among these one can mention the dynamic operation of stage wise processes, in which each mode of operation has its own dynamic behavior. Transition from one mode to another one is caused by the occurrence of various events. The main objective of this work is to investigate various approaches exist for the modeling, state estimation and control of these systems. To do this, a system consisting of four tanks connected to each other is considered as a case study of this work. The performance of the state estimation method, and the implemented control algorithm has been evaluated based on the simulation of the benchmark via Matlab-Simulink-Stateflow toolboxes. In order to make the work more realistic, it has been assumed that the operating mode of the system unknown and it has been estimated by an observer design for this purpose. Having obtained the mode of operation, various states of the systems (both discrete and continuous ones) are obtained based on another nonlinear observer designed for this purpose. The appropriate nonlinear controller required for each mode of operation is designed based on GLC method
  9. Keywords:
  10. Observer ; Discrete Event Simulation ; Hybrid System ; Hybrid Automata ; Transition Detector ; Multimodel Generalized Linear Controller

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