이득조정이 간단한 선형전동기 구동 2자유도 PID제어계의 설계

The Design of PID Control System with TDOF for Linear Motor Drive with Easy Gain Adjustment

Recently, the application in the linear machine for industrial field is remarkably increased, especially for the gantry machine, machine tool system and CNC. However a linear motor remains the vibrational characteristic itself. In these application fields, high position control performance is essentially required in both the steady and the transient stated. In this paper, the design method for a position control is proposed by using the two-degree-of freedom PID controller. This method has great features for the linear machine drives such as no over-shoot phenomena and single gain tuning strategy. By comparison with conventional PID controller, the improvement of performance of a linear motor control system using two degrees of freedom controller is discussed. The usefulness of the proposed algorithm is proved by the simulation. With the simulation results, it was made clear that the introduction of two degrees of freedom controller designed by the proposed method not only improves the over shoot and starting characteristic of response but also removes the undesirable characteristic variation on a load variation.