预警卫星前馈+H_∞回路成形复合控制  

Feed-Forward+H_∞ Loop Shaping Compound Control of an Early-Warning Satellite

作　　者：王涛[1] 李顺利[1] 张卓[1] 崔垚[1] 

机构地区：[1]哈尔滨工业大学航天学院,黑龙江哈尔滨150001

出　　处：《上海航天》2013年第1期24-29,35,共7页Aerospace Shanghai

摘　　要：为补偿预警卫星扫描相机对系统产生的干扰力矩,考虑预警卫星系统的不确定性,设计了前馈+H∞回路成形的复合控制方案。用拉格朗日法建立有扫描相机的预警卫星动力学模型,根据H∞回路成形理论设计星体姿态控制器,用μ法分析控制器的鲁棒稳定性,基于动量守恒定理设计补偿扫描相机干扰力矩的前馈控制器。数学仿真结果表明:设计的前馈+H∞回路成形的复合控制方案具鲁棒稳定性,且能有效补偿扫描相机运动产生的扰动,控制精度和稳定度高。In order to compensate the disturbing torques generated by the scanning camera of the early warning satellite, the feed-forward ＋ H∞ loop shaping compound control scheme was designed in which the uncertainty of the satellite system was taken into consideration in this paper. The dynamic model of an early-earning satellite with a scanning camera was established based on Lagrange method. The theory of H∞ loop shaping was employed to design a satellite attitude controller, and the robust stability of the controller was analyzed with the method ol μ analysis. The feed-forward controller that could compensate the disturbing torques generated by the scanning camera was devised according to the law of conservation of momentum. The numerical simulation results showed that the feed-forward ＋ H∞ loop shaping compound control scheme designed would not only possess the robust stability, but also effectively compensate the disturbance generated by the scanning camera, which had high precision and stability.

关 键 词：预警卫星 扫描相机 H∞回路成形 Μ分析 前馈控制 

分 类 号：V448.22[航空宇航科学与技术—飞行器设计]