Disturbance rejection control for large ground-based telescope

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	Disturbance rejection control for large ground-based telescope
	Wang, S.; Y.-T. Deng and J. Zhu
刊名	Guangxue Jingmi Gongcheng/Optics and Precision Engineering
	2017
卷号	25 期号:10
英文摘要	An improved disturbance rejection control algorithm was proposed to overcome the velocity fluctuation caused by the disturbance torque in a large ground-based telescope. The algorithm consists of two closed-loop structures, an inner high-bandwidth current loop and an outer speed loop. The inner current loop is a PI controller. The outer loop is a speed controller adopting the linear active disturbance rejection controller. For the speed loop, an extended state observer is used to estimate the system disturbances, and the estimated disturbance is fed into the control system to form a composite correction system. To solve the problem of controller saturation caused by the large dynamic input, an anti-windup control algorithm was induced the input of the extended state observer to guarantee the stability and good dynamic characteristics of the system. The simulation and experimental results show that linear active disturbance rejection controller with anti-windup achieves fast response without overshoot at both high or low speeds as compared with the PI controller. In a low speed smoothing experiment, the algorithm improves the RMS value of speed error from 0.000 68()/s to 0.000 32()/s. Experimental results demonstrate that the proposed algorithm effectively reduces the velocity fluctuation of the servo system caused by the motor torque ripple and improves its speed smooth. 2017, Science Press. All right reserved.
语种	中文
内容类型	期刊论文
源URL	[http://ir.ciomp.ac.cn/handle/181722/59271]
专题	长春光学精密机械与物理研究所_中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Wang, S.,Y.-T. Deng and J. Zhu. Disturbance rejection control for large ground-based telescope[J]. Guangxue Jingmi Gongcheng/Optics and Precision Engineering,2017,25(10).
APA	Wang, S.,&Y.-T. Deng and J. Zhu.(2017).Disturbance rejection control for large ground-based telescope.Guangxue Jingmi Gongcheng/Optics and Precision Engineering,25(10).
MLA	Wang, S.,et al."Disturbance rejection control for large ground-based telescope".Guangxue Jingmi Gongcheng/Optics and Precision Engineering 25.10(2017).