PID CONTROL METHOD OF CHANGING PARAMETERS ADAPTIVELY AND APPARATUS THEREOF

摘要

PURPOSE: A PID(proportional integral derivate) control method for adaptively changing a control parameter and a PID control device using the same are provided to improve machining accuracy by outputting a control signal using an updated control parameter. CONSTITUTION: A PID controller(110) outputs a control signal for controlling a control object(160). An update unit(115) changes a control parameter of the PID controller by using a time difference from a time error calculation unit(150). A compensation value calculation unit(120) calculates a compensation value according to the result of controlling an external environment. A parameter generator(130) generates change information to change the parameter. A performance evaluation unit(140) delivers evaluation information to the time error calculation unit. [Reference numerals] (110) PID controller; (120) Compensation value calculation unit; (125) Approximate model generator; (130) Parameter generator; (140) Performance evaluation unit; (150) Time error calculation unit; (160) Controlled system