深空探测天线自抗扰控制技术研究

Research on Active Disturbance Rejection Control Technology of Deep Space Exploration Antenna

随着深空探测技术的不断发展,深空探测设备天线口径的不断增大,观测频率越来越高,波束宽度越来越窄,这对天线伺服系统控制精度提出了很高的要求。深空探测天线伺服系统采用的PID控制是典型的被动抗扰设计,虽具有控制器结构简单、参数易于调整的优点,但抗扰能力不足的缺点,使其难以满足高精度指向和跟踪的需要。针对此问题,提出了基于自抗扰控制技术的线性自抗扰技术补偿控制方法,以深空探测设备伺服系统位置环为控制对象,设计了线性自抗扰控制器,并通过Matlab仿真,验证了该控制器在复杂风扰环境下的性能表现。

With the continuous development of the deep space exploration technology,the diameter of the deep space antennas is becoming larger,the frequency of the observation is becoming higher,and the beam width is becoming narrower,which puts forward high requirements for the control precision of the antenna servo system.The PID control used in the deep space exploration antenna servo system is the traditional passive anti-interference design.Though it has the advantages such as a simple controller structure and easy parameter adjustment,the disadvantage of the shortage of the anti-interference ability makes it difficult to meet the demand for the highprecision pointing and tracking.To address the problem mentioned above,the compensation method of the linear active disturbance rejection control based on the active disturbance rejection control is put forward.The position loop of the deep space exploration antennas servo system is taken as the controller member,the linear active disturbance rejection controller is designed,and the performance of this controller in the complicated wind-disturbance circumstances is verified using the Matlab simulation.