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IJSTR >> Volume 3- Issue 9, September 2014 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Tuning Of A Pd-Pi Controller Used With An Integrating Plus Time Delay Process

[Full Text]



Galal A. Hassaan



Keywords: PD-PI Controller, Integrating plus Time Delay Process, Controller Tuning, Control System Performance.



Abstract: Integral time delayed processes require more attention in selecting reasonable controllers associated with them because they are a class of nonlinear processes . In this work, the PD-PI controller is examined to investigate its replacement to the classical PID controller. This research work has proven that the PD-PI results in a better performance for the closed-loop control system incorporating the PD-PI controller and an integrator plus delay time process. The time delay effect is compensated using 2nd order Pade approximation. The controller is tuned by minimizing the sum of square of error (ISE) of the control system using MATLAB. The MATLAB optimization toolbox is used assuming that the tuning problem is an unconstrained one. The result was producing a step response of the controlled process without any maximum percentage overshoot or maximum percentage undershoot. The performance of the control system using an PD-PI controller using the present tuning technique is compared with that using a PIDF controller tuned by Zhang and others in 1999.



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