【作者】 傅敬博； 刘明；

【Author】 Jingbo Fu;Ming Liu;Research Center of Satellite Technology,Harbin Institute of Technology;

【机构】 哈尔滨工业大学卫星技术研究所；

【摘要】 针对通讯时延情形下SAR卫星编队的姿态控制问题,本文提出了一种滑模姿态协同控制策略。首先,SAR卫星编队的期望姿态由地面目标点位置和各个卫星在空间中的位置实时计算所得。在每个成员卫星都可以获得地面目标点位置的前提下,设计了一类积分型滑模面及控制器将动力学方程中存在的不确定性、外部扰动等因素抑制,得到一个标称系统。针对标称系统,设计了一种具有补偿性能的滑模控制器;控制器可以保证各卫星的姿态跟踪误差渐近收敛到平衡点。仿真算例表明,本文所提出的SAR卫星编队姿态协同控制策略能保证十涉成像任务的完成。更多还原

【Abstract】 In this paper,a coordinated attitude controller for SAR satellites with communication delay is proposed using sliding mode control theory.Assuming that the position of a target is available to all member satellites and the desired attitudes of SAR satellites are calculated with the coordinates of the target and satellites,an integral sliding mode surface is designed to compensate the model uncertainty and external perturbations and to get a nominal system.Based on the nominal system,a sliding mode controller is proposed to make the attitude state errors of SAR satellites asymptotic stable.Numerical simulation is presented to show that the given controller is useful in achieving attitude tracking and fulfilling the task of interferometric imaging.更多还原