The design and application of an intelligent stepper motor speed controller / Ahmad Shukri Fazil Rahman

This thesis described a new system to control the speed of a stepper motor. Stepper motors are mainly used for position control, therefore the concept of using it for a speed control could replace the conventional method of using servomotor. Three chosen controllers were successfully designed and developed. The three controllers: PID, fuzzy proportional derivative (FuzzyPD) and fuzzy proportional integral (FuzzyPI) were implemented and their performances were investigated. The core techniques for testing their performances include various transient analysis, load test and comparative studies. Results shown in this thesis indicate that all of the three controllers worked rather well and their responses were fast and accurate. Comparatively, the PID controller provided the fastest response but the fuzzy controllers were more consistent with minimum overshoots.