Fractional PI Tuning for the First Order Plus Dead Time Processes

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Paridari, Kaveh | 2011

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 42654 (05)
University: Sharif University of Technology
Department: Electrical Engineering
Advisor(s): Tavazoei, Mohammad Saleh
Abstract:
In this thesis, a new method has been developed for tuning of fractional PI ( ) and fractional [PI] ( ) controllers for the first order plus dead-time ( ) systems. By using the performance-map method ( ) and based on phase and gain margins' criteria, a formula which is function of fractional order ( ) and normalized dead-time ( ) has been proposed for the proportional and integral coefficients. In addition, an equation has been given for the fractional order of controller to minimize the integrated absolute error ( ) index. Moreover, overshoot and settling-time of the step response of the system have been improved by dynamic setpoint weighting. Simulation results have shown that proposed tuning rules are effective for large normalized dead-time and in comparison with other well-known methods, the controlled system is more robust against process parameters uncertainties
Keywords:
Performance Map ; First Order Plus Dead-Time System ; Fractional Proportional-Integral Controller ; Phase and Gain Margins ; Set Point Weighting

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