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Fuzzy Fractional Order PID Design

Mohammadian Roshan, Yaser | 2008

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 39389 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Sadati, Naser
  7. Abstract:
  8. In this thesis a novel Fuzzy Fractional Order Controller (FFOPID) is presented. This controller is designed by the means of the combination of a fuzzy system and a fractional order PID. Fractional controllers, especially fractional PIDs, shows their performance in control systems after the advent of fractional calculus. Fractional PID has better flexibility according to the classic PID. As the real control systems are nonlinear actually, so solving the control problem needs a nonlinear controller. Therefore, a fuzzy system is used in this thesis, in order to adapt the controller parameters with different operating points of the system. Fuzzy system design needs the optimal values for membership functions. An evolutionary PSO method is used in order to handle this problem. In the appropriate fitness function definition, we have considered three important control goals; Nominal stability, H performance and H2 performance. Finally, the proposed controller performance is analyzed on an anesthesia control system and also on a power system stabilizer system
  9. Keywords:
  10. Fractional Calculus ; Fuzzy Logic ; Power System Stablizer(PSS) ; Anesthesia Depth ; Fractional Order Proportional Integrated Derivative (FOPID)Controller ; Multidisciplinary Optimization

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