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Masters Theses
Date of Award
12-1996
Degree Type
Thesis
Degree Name
Master of Science
Major
Electrical Engineering
Major Professor
James C. Hung
Committee Members
Marshall O. Pace, J. Wayne Waller
Abstract
This study presents a comparison of LQ optimal and fuzzy control on a complex mechanical servomotor system modeled after a missile seeker. Simulation results indicate that the fuzzy controller displays superior robustness to uncertainties in the physical system that tend to cause steady-state error. The fuzzy controller uses a variation of Sugeno inference, a variable input gain adaptation mechanism to accommodate variation in step response sizes, and an integral emulator that uses a gradient-descent philosophy to eliminate steady-state error. The state variable controller is augmented with the fuzzy integral emulator to significantly reduce its sensitivity to steady-state error without introducing the degradation in transient characteristics caused by use of linear integral control on a system with drastic limiting of the control output.
Recommended Citation
Conboy, David Joseph, "Fuzzy logic and state variable control applied to a seeker servomotor system. " Master's Thesis, University of Tennessee, 1996.
https://trace.tennessee.edu/utk_gradthes/10801