PID CONTROL DEVICE AND METHOD FOR DECIDING ITS ACTION, PID ADJUSTING DEVICE AND METHOD FOR IDENTIFYING TRANSFER FUNCTION FOR CONTROL OBJECT

摘要

PROBLEM TO BE SOLVED: To provide a method for deciding an appropriate control action to stabilize a control object, particularly for deciding a derivative action.;SOLUTION: A PID control device based on the present invention has a derivative gain for a derivative action to control an object being controlled, which is set based on a decision factor α (α=a₂²/(a₃.a₁), where a₁ is a first-order coefficient of denominator polynomial for a transfer function being identified for the said object being controlled based on a transfer function model for more than the third-order, a₂ is the second-order coefficient, and a₃ is the third- order coefficient).;COPYRIGHT: (C)2003,JPO