Title :
Introduction to the nonlinear PIλDμ control
Author :
Merrikh-Bayat, Farshad ; Mirebrahimi, Nafiseh
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Zanjan, Zanjan, Iran
Abstract :
In this paper, the nonlinear fractional-order PID (N-FO-PID) controller, which can be considered as a combination of the nonlinear and the fractional-order PID controllers, is introduced for the first time. It is shown that the proposed structure, which has eight parameters to tune, provides us with a powerful framework to control complicated processes by using smaller control effort compared to the PID controllers. Tuning the parameters of the proposed N-FO-PID controller is discussed and the challenges are presented. Application of the N-FO-PID controller to control a first-order plus time delay process, a process with nonlinear valve and the nonlinear magnetic levitation system is studied and the results are compared with the conventional PID, nonlinear PID and fractional-order PID controllers.
Keywords :
delays; magnetic levitation; nonlinear control systems; three-term control; N-FO-PID controller; nonlinear PIλDμ control; nonlinear fractional-order PID controller; nonlinear magnetic levitation system; time delay process; Closed loop systems; PD control; Performance analysis; Process control; Transfer functions; Tuning;
Conference_Titel :
Control System, Computing and Engineering (ICCSCE), 2011 IEEE International Conference on
Conference_Location :
Penang
Print_ISBN :
978-1-4577-1640-9
DOI :
10.1109/ICCSCE.2011.6190493