Mixed-sensitivity-based robust control of secondary mirror adjustment mechanism for space telescopes

doi:10.3788/OPE.20182605.1113

CIOMP OpenIR

	Mixed-sensitivity-based robust control of secondary mirror adjustment mechanism for space telescopes
	Cao, Xiao-Tao; Yang, Wei-Fan; Wang, Han; Zhao, Hai-Bo; Wang, Ke-Jun
	2018
发表期刊	Guangxue Jingmi Gongcheng/Optics and Precision Engineering
ISSN	1004924X
卷号	26 期号:5 页码:1113-1123
摘要	Secondary mirror adjustment mechanisms are core elements of active optics used for the adjustment of space telescopes. For real-time rapid adjustments in orbit, great demands are put on their adjusting accuracy and dynamic characteristics. Because of nonlinearity, uncertainty, disturbances, and coupling of the system, sufficient control cannot be easily achieved by traditional methods based on intermixing PID systems and inverse kinematics. Focusing on this problem, an uncoupled electromechanical model was proposed by transforming the joint couple dynamics into external disturbances. The model uncertainty was represented by the multiplicative uncertainty resulting from the system identification, and the mixed sensitivity function was designed according to the model error bound and performance index. By using the extended method to deal with the imaginary axis pole, the complex dynamic system was transformed into a stacked S/T/KS problem. A robust controller was designed by MATLAB and a digital algorithm was realized using DSP. The improved robustness, disturbance rejection, and dynamic characteristics were verified by both simulations and experimental results, proving that space-reliable application can be achieved. 2018, Science Press. All right reserved.
关键词	Dynamics Disturbance rejection Inverse kinematics Inverse problems MATLAB Mirrors Robust control Space telescopes Uncertainty analysis
DOI	10.3788/OPE.20182605.1113
收录类别	EI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/60725
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	Cao, Xiao-Tao,Yang, Wei-Fan,Wang, Han,et al. Mixed-sensitivity-based robust control of secondary mirror adjustment mechanism for space telescopes[J]. Guangxue Jingmi Gongcheng/Optics and Precision Engineering,2018,26(5):1113-1123.
APA	Cao, Xiao-Tao,Yang, Wei-Fan,Wang, Han,Zhao, Hai-Bo,&Wang, Ke-Jun.(2018).Mixed-sensitivity-based robust control of secondary mirror adjustment mechanism for space telescopes.Guangxue Jingmi Gongcheng/Optics and Precision Engineering,26(5),1113-1123.
MLA	Cao, Xiao-Tao,et al."Mixed-sensitivity-based robust control of secondary mirror adjustment mechanism for space telescopes".Guangxue Jingmi Gongcheng/Optics and Precision Engineering 26.5(2018):1113-1123.

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