The Application of PID-DMC Algorithm with Feedforward Compensation in the PTZ Platform

Abstract

According to the characteristics of PTZ camera itself pure delay of measurement and control, discontinuity of control system and unknown model, a new PID-DMC control algorithm with feedforward compensation is proposed. When using the conventional PID algorithm to control, due to the discontinuity of the control amount of the PTZ camera, the serious control jitter when the closed-loop system operating, the stability of the system is affected critically, and even the equipment will be damaged. For this reason, feedforward compensation is added on the basis of conventional PID control to alleviate the problem of increasing of the overshoot caused by the integral action. Meanwhile, DMC control is introduced to effectively reduce the fluctuation of the system, which makes the follow-up tracking of the system more stable and effective.