Abstract:Servo system is an important part of radio telemetry equipment, with the continuous development of Telemetry Technology, the steady-state accuracy and response speed of the servo system are higher. The feedforward composite control algorithm is used to eliminate the lag error of the system, improving the accuracy of the system has a good effect, estimation of target angular velocity by PD controller, advance prediction of angular velocity by using Newton predictor, realization of equivalent feedforward composite control based on target angular velocity prediction. actual test verification, the servo system using PD controller and Newton predictor control technology can achieve fast target tracking.