Extended state observer-based control with an adjustable parameter for a large ground-based telescope

doi:10.1088/1674-4527/21/12/316

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	Extended state observer-based control with an adjustable parameter for a large ground-based telescope
	X. X. Yang; Y. T. Deng; B. Zhang and J. L. Wang
刊名	Research in Astronomy and Astrophysics
	2022
卷号	21 期号:12 页码:10
ISSN号	1674-4527
DOI	10.1088/1674-4527/21/12/316
英文摘要	The high-precision requirements will always be constrained due to the complicated operating conditions of the ground-based telescope. Owing to various internal and external disturbances, it is necessary to study a control method, which should have a good ability on disturbance rejection and a good adaptability on system parameter variation. The traditional proportional-integral (PI) controller has the advantage of simple and easy adjustment, but it cannot deal with the disturbances well in different situations. This paper proposes a simplified active disturbance rejection control law, whose debugging is as simple as the PI controller, and with better disturbance rejection ability and parameter adaptability. It adopts a simplified second-order extended state observer (ESO) with an adjustable parameter to accommodate the significant variation of the inertia during the different design stages of the telescope. The gain parameter of the ESO can be adjusted online with a recursive least square estimating method once the system parameter has changed significantly. Thus, the ESO can estimate the total disturbances timely and the controller will compensate them accordingly. With the adjustable parameter of the ESO, the controller can always achieve better performance in different applications of the telescope. The simulation and experimental verification of the control law was conducted on a 1.2-meter ground based telescope. The results verify the necessity of adjusting the parameter of the ESO, and demonstrate better disturbance rejection ability in a large range of speed variations during the design stages of the telescope.
URL标识	查看原文
语种	英语
内容类型	期刊论文
源URL	[http://ir.ciomp.ac.cn/handle/181722/66655]
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	X. X. Yang,Y. T. Deng,B. Zhang and J. L. Wang. Extended state observer-based control with an adjustable parameter for a large ground-based telescope[J]. Research in Astronomy and Astrophysics,2022,21(12):10.
APA	X. X. Yang,Y. T. Deng,&B. Zhang and J. L. Wang.(2022).Extended state observer-based control with an adjustable parameter for a large ground-based telescope.Research in Astronomy and Astrophysics,21(12),10.
MLA	X. X. Yang,et al."Extended state observer-based control with an adjustable parameter for a large ground-based telescope".Research in Astronomy and Astrophysics 21.12(2022):10.