用户卫星天线跟踪指向自抗扰控制方法

为同时解决用户卫星天线控制系统的鲁棒性、解耦控制和高跟踪速率下的高精度跟踪控制等问题,采用非线性自抗扰控制方法,提出了一种新型的用户卫星天线跟踪指向控制系统.设计该控制系统,无需精确的天线数学模型.采用扩张状态观测器对天线模型实现动态补偿,则在方位和俯仰通道上被简化为两个近似解耦的积分系统.仿真结果表明,提出的天线控制系统具有较高的跟踪指向性能且对干扰及不确定性具有较强的鲁棒性.该控制方法有效地解决了天线跟踪指向控制问题.

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.