PID SELF-TUNNING CONTROL AND METHOD USING FUZZY THEORY

摘要

A PID self-tuning control apparatus includes a relay, a PID controller, and a fuzzy inference part. The PID controller controls a subject system by a PID parameter according to a vibration period and an amplitude. If a unit response characteristic of a subject system according to a PID parameter is not proper to an option of the user, a fuzzy inference part changes a PID parameter by a fuzzy inference using the user's option as an input variable.