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

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

机构地区：[1]State Key Laboratory of Fluid Power Transmission and Control,Zhejiang University [2]College of Engineering,Shantou University

出　　处：《Frontiers of Information Technology & Electronic Engineering》2017年第10期1624-1634,共11页信息与电子工程前沿（英文版）

基　　金：supported by the National Basic Research Program(973)of China(No.2013CB035400);the National High-Tech R&D Program(863)of China(No.2012AA041803);the National Natural Science Foundation of China(No.51221004)

摘　　要：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.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.

关 键 词：Large-scale reflecting telescope Quantitative feedback theory Electro-hydraulic position control system Micron-level position control capability System identification Robust stability 

分 类 号：TH751.1[机械工程—仪器科学与技术]