Fuzzy I-PD Controller for Two-inertia Systems

S. Dadpant1,a, S. Nundrakwang1,b, T. Benjanarasuth1,c, J. Ngamwiwit1,d and N. Komine2

1Faculty of Engineering, King Mongkut’s Institute of Technology Ladkrabang, Bangkok, Thailand.

2School of Information and Telecommunication Engineering, Tokai University, Kanagawa, Japan.


This paper presents a design of fuzzy I-PD (integralproportional plus derivative) controller for controlling the speed of two-inertia system. The proposed controller is a modification of conventional I-PD controller based on the characteristic ratio assignment (CRA) method. It consists of a Mamdani fuzzy I controller and a Mamdani fuzzy PD controller. The fuzzy I-PD controller parameters are adjusted to reduce overshoot of the system response. The satisfied system performances are shown by the simulation results in controlling the two-inertia system using the proposed controller with the same parameters (proportional gain, integral gain and derivative gain) as the conventional I-PD controller.

Keywords: Mamdani fuzzy I-PD controller, I-PD controller, Two-inertia system.

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