摘要
面向在轨服务的空间电磁对接技术具有广阔应用前景,但其姿态控制设计存在强非线性及耦合性问题需要解决,电磁/地磁力矩干扰姿态系统稳定。针对绝对/相对姿态动力学模型,分别采用反馈线性化以及鲁棒H∞控制综合方法、扩张状态观测器以及鲁棒H∞控制综合方法设计姿态控制系统。理论研究、对比分析两种控制策略特点,并通过仿真验证了所设计控制系统的可行性。理论研究及仿真结果表明:两种控制策略都是可行的,对模型参数变化及外界干扰具有较强鲁棒性;基于相对姿态动力学的综合控制设计方法能有效利用航天器相对姿态测量信息,且无需额外设计状态估计器。
Space electromagnetic docking technology has perfect application for on-orbit servicing,but the electromagnetic and geomagnetic torques it brings create disturbances to the docking attitude.Also,the problems resulted from nonlinearity and coupling properties exist in the attitude controller design of space electromagnetic docking.The combined method of feedback linearization and H∞,extended state observer and H∞ was proposed to design robust attitude controller for absolute/relative dynamics respectively,and the mentioned problems are better resolved.The advantages and shortages of the two control strategies are compared and researched,and the feasibility of designed controllers is verified by simulation.From theoretical research and simulation verification,it is right to put forward that the two control strategies are feasible and have better robust performance to model parameter change and outer disturbance,and the strategy of relative attitude control design is better for its preferably using measure information and no state estimator needs to be added.
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2012年第5期5-9,共5页
Journal of National University of Defense Technology
基金
国家自然科学基金资助项目(11172322)
关键词
空间电磁对接
电磁力矩干扰
鲁棒姿态控制
反馈线性化
扩张状态观测器
H∞控制
space electromagnetic docking
electromagnetic torque disturbance
robust attitude control
feedback linearization
extended state observer
H∞ control
