挠性卫星姿态解藕控制器多变量频率域设计方法

Flexible Satellite Attitude Decoupling Controller Design Using Multiple Variable Frequency Domain Method

针对具有不对称挠性附件卫星的姿态控制,采用改进的鲁棒逆Nyquist阵列方法进行姿态解藕控制器设计。首先建立了挠性卫星姿态运动的简化模型,模型采用逆传递函数矩阵的形式,并且考虑了不确定项。然后对传统的鲁棒逆Nyquist阵列方法改进,使之保守性更小。利用此方法设计了卫星姿态解藕控制器,此控制器能够实现不同通道的解耦,并且对模型误差具有较好的鲁棒性,易于工程实现。仿真给出了设计过程,并验证了该方法的有效性。

This paper used an improved robust inverse Nyquist array （RINA） method to design an attitude decoupling controller for a satellite with flexible structure. Firstly, we present the model of flexible satellite in the form of inverse transfer function matrix. Then the RINA approach was improved so that the conservation of the method is reduced. Based on the method, we designed the attitude decoupling controller for the flexible satellite. The design method can decouple the different attitude channels and is robust to the model uncertainty. The process of design and the performance of the method were illustrated in simulation example.