基于干扰观测器的天基观测航天器姿态控制设计

与地基空间目标监视系统相比,天基观测系统具有监视范围广,不受国界限制,观测精度高等优点,是未来空间目标观测技术的重要发展方向。但天基观测航天器工作时,相机转台的运动,太阳能帆板挠性部件的弹性振动与航天器的姿态运动相互影响,构成强耦合的非线性系统,传统的控制方案无法实现对这类天基观测航天器的高精度姿态控制。文章针对某一空间观测航天器的任务要求,设计了基于干扰观测器的前馈补偿航天器姿态控制系统,仿真实验结果表明:姿态角控制精度小于 0.06°,姿态角速度精度小于 0.03(°)/s,达到了精度要求。

Design of Attitude Control System of Space-Based Observation Spacecraft Based on Disturbance Observer

Compared with the target monitoring system of ground space, the advantages of space-based observation systemis monitoring range, not limited by national boundaries and higher accuracy of observation, It is an important developmentdirection of future space target observation technology. But when the space-based observing spacecraft work, strongly cou.pled nonlinear systems because of camera motion, attitude motion and elastic vibration of flexible spacecraft solar panelcomponent interaction. The conventional control method cannot achieve the high precision of this kind of space-based ob.serving spacecraft attitude control. In this paper, aiming at the mission requirements for a space observation spacecraft, theattitude control system of a feed forward compensator based on disturbance observer was designed. Simulation resultsshowed that attitude angle control precision <0.06° , attitude angular velocity precision <0.03(°)/s , reached the design ac. curacy requirements.