Active Disturbance Rejection Method for Antenna Tracking and Pointing Control of User-Satellite

To simultaneously solve the problems of the robustness,decoupling control and high accuracy tracking control at the high tracking rate in antenna control system,a new nonlinear antenna tracking-pointing control system for user-satellite was proposed based on a unique nonlinear active disturbance rejection control method.The control system was designed without an explicit mathematical model of the antenna.The antenna's model was dynamically compensated with the extended state observers and it was simplified to two approximately decoupled integrator systems in the azimuth and elevation channels.The simulation results show that the proposed antenna control system has the high tracking-point performance and the strong robustness against the disturbance and the uncertainties.This control method effectively solves the problems of the antenna tracking-pointing control.