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CLC number: TH137; TP13

On-line Access: 2017-12-04

Received: 2016-10-09

Revision Accepted: 2016-11-10

Crosschecked: 2017-10-29

Cited: 0

Clicked: 1739

Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Xiong-bin Peng

http://orcid.org/0000-0002-8120-4990

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Frontiers of Information Technology & Electronic Engineering  2017 Vol.18 No.10 P.1624-1634

http://doi.org/10.1631/FITEE.1601104


Quantitative feedback controller design and test for an electro-hydraulic position control system in a large-scale reflecting telescope


Author(s):  Xiong-bin Peng, Guo-fang Gong, Hua-yong Yang, Hai-yang Lou, Wei-qiang Wu, Tong Liu

Affiliation(s):  State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   zju_pxb@163.com

Key Words:  Large-scale reflecting telescope, Quantitative feedback theory, Electro-hydraulic position control system, Micron-level position control capability, System identification, Robust stability


Xiong-bin Peng, Guo-fang Gong, Hua-yong Yang, Hai-yang Lou, Wei-qiang Wu, Tong Liu. Quantitative feedback controller design and test for an electro-hydraulic position control system in a large-scale reflecting telescope[J]. Frontiers of Information Technology & Electronic Engineering, 2017, 18(10): 1624-1634.

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%A Hai-yang Lou
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A1 - Wei-qiang Wu
A1 - Tong Liu
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Abstract: 
For the primary mirror of a large-scale telescope, an electro-hydraulic position control system (EHPCS) is used in the primary mirror support system. The EHPCS helps the telescope improve imaging quality and requires a micron-level position control capability with a high convergence rate, high tracking accuracy, and stability over a wide mirror cell rotation region. In addition, the EHPCS parameters vary across different working conditions, thus rendering the system nonlinear. In this paper, we propose a robust closed-loop design for the position control system in a primary hydraulic support system. The control system is synthesized based on quantitative feedback theory. The parameter bounds are defined by system modeling and identified using the frequency response method. The proposed controller design achieves robust stability and a reference tracking performance by loop shaping in the frequency domain. Experiment results are included from the test rig for the primary mirror support system, showing the effectiveness of the proposed control design.

大口径望远镜主镜支撑位置控制系统的定量反馈控制器设计与测试

概要:确保主镜支撑位置控制系统的响应速度、定位精度及稳定性是提高大口径望远镜成像质量的关键。镜室的姿态调整及环境温度的变化会改变位置控制系统的工作参数,加剧系统非线性,增加望远镜精确成像的难度。我们提出了基于定量反馈理论的位置控制器设计,辨识系统工作参数,确定工作参数范围,设计补偿控制器及前置滤波器。仿真及实验结果说明,主镜支撑位置控制系统的定量反馈控制器在保证较好的响应速度前提下,具有很好的位置控制精度及稳定性。

关键词:大口径望远镜;定量反馈理论;主镜位置控制系统;微米级位置控制能力;系统辨识;鲁棒稳定性

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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