Date of Award
Doctor of Philosophy
Industrial Education and Technology
William D. Wolansky
An expert fuzzy logic controller with adaptive learning is proposed as an intelligent controller for servo systems. A key component of this controller is an adaptive learning mechanism which is used to self-regulate the scaling factors and the control action based on the error between the desired value and the plant output. The inference engine of this controller is based on the principle of approximate reasoning and the learning strategy is based on reinforcement learning. A novel approach of model reference adaptive control is also proposed for servo systems. The comparison of the performance between the proposed controller and PID controllers is discussed. The simulation results show that the performance of the proposed controller is better than the conventional approach or previous research. The real-time application demonstrates that a faster response of a servo system can be achieved. Furthermore, the proposed controller is relatively insensitive to variations in the parameters of control systems.
Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/
Yeh, Zong-Mu, "An expert fuzzy logic controller employing adaptive learning for servo systems " (1992). Retrospective Theses and Dissertations. 10392.