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

Xiong-bin PENG; Guo-fang GONG; Hua-yong YANG; Hai-yang LOU; Wei-qiang WU; Tong LIU

doi:10.1631/FITEE.1601104

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

Regular Papers | Updated：2022-05-19

- Quantitative feedback controller design and test for an electro-hydraulic position control system in a large-scale reflecting telescope
- 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
- Frontiers of Information Technology & Electronic Engineering Vol. 18, Issue 10, Pages: 1624-1634(2017)
- Affiliations：
  
  State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China
  College of Engineering, Shantou University, Shantou 515063, China
- Author bio：
  
  Xiong-bin PENG, E-mail: zju_pxb@163.com
- Funds：
- DOI：10.1631/FITEE.1601104
  CLC： TH137;TP13
- Received：09 October 2016，
  
  Revised：2017-10-29，
  
  Published：2017-10
- Accepted：
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Xiong-bin PENG, Guo-fang GONG, Hua-yong YANG, et al. 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.
DOI：

Xiong-bin PENG, Guo-fang GONG, Hua-yong YANG, et al. 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. DOI： 10.1631/FITEE.1601104.

摘要

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。

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.

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references

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