基于全柔性卫星模型的控制闭环微振动建模与仿真

针对高分辨率遥感卫星的微振动分析，给出了一种整星结构运动与姿态控制系统闭环的建模方法。该方法基于全柔性卫星模型，通过考虑姿态控制系统的控制律和硬件特性建立集成仿真模型，进而预测卫星在轨微振动的微振动响应和结构传递特性。文章以某遥感卫星为例，分别从开环和闭环角度给出了微振动的微振动响应和结构传递特性的结果，并进行对比分析。分析结果表明：提出的方法能够实现全柔性卫星模型的控制闭环微振动分析，相对于传统的开环仿真更接近在轨实际情况。

Control Closed-loop Micro-vibration Modeling and Simulation Based on Flexible Satellite Model

For the micro-vibration analysis of high resolution remote sensing satellite,a closed-loop modeling method connecting satellite structure and attitude control is presented.By building integrated simulation model based on the flexible satellite model as well as the control law and hardware properties of the attitude control system,the method can be used to predict the in-orbit response of micro-vibration signals and transfer characteristics of the satellite structure.For the example of a remote sensing satellite,the results of the time response and the structure transfer characteristics are presented and analyzed comparably,from the viewpoint of open-loop and closed-loop respectively.The analysis results show that the presented method can realize the control closed-loop micro-vibration analysis of the flexible satellite model,and is closer to the real case in orbit compared with the traditional open-loop simulation.