Simple Tuning Method of a Fuzzy PID Controller for a Class of Unstable Processes

Abstract:

In this paper, a class of fuzzy Proportion-Integration-Differentiation (PID) controller is tuned for a class of unstable processes based on PID theory. Phase margin and gain margin method is used to design the controller. Moreover, in order to reduce complications of solving equations deduced from phase margin and gain margin, a global approximate method is proposed for those equations. Finally, the simulation results show that the design method not only can be applied to the class of unstable processes but also has a better robustness than traditional PID controller.

• Periodical: Applied Mechanics and Materials (Volumes 321-324)
• Pages: 1649-1656
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.321-324.1649
• Online since: June 2013
• Authors: Yao Qing Ren, Zhen Xu, Wen Hua Ding
• Keywords: Fuzzy PID Controller, Phase Margin and Gain Margin, Tuning, Unstable Processes

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