自适应光学千单元级高压驱动系统的设计和性能分析  

Design and performance analysis of high-voltage drive system for thousand-element adaptive optics

作　　者：邵蒙 李洪文[1] 王建立[1] 杨乐强 姚凯男[1] 邓永停[1] SHAO Meng;LI Hongwen;WANG Jianli;YANG Leqiang;YAO Kainan;DENG Yongting(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China)

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033

出　　处：《光学精密工程》2023年第17期2493-2504,共12页Optics and Precision Engineering

基　　金：国家自然科学基金资助项目(No.11973041,No.12122304);国家重点研发计划资助项目(No.2020YFA0406502);天文联合基金资助项目(No.U2031126)。

摘　　要：自适应光学技术可以对大气湍流造成的波前误差进行实时校正,是实现大型地基望远镜高分辨率成像的关键技术。随着望远镜口径不断增大,自适应光学系统的校正单元数达到千单元量级。首先从自动控制角度建立了自适应光学系统各电控环节的等效模型,分析了系统延时对控制环节性能的影响。然后介绍了自适应光学电控环节中高压驱动系统的设计问题,从自动控制角度分析了自适应光学系统对高压放大器闭环带宽的需求,给出了分析结果。最后报道了千单元级自适应光学高压驱动系统的集成和测试工作。实验结果表明:本文所设计的高压放大器可以实现120 V输出,-3 dB带宽达到5000 Hz,所设计的高压驱动系统经过集成后,利用湍流屏等效模拟60 Hz格林伍德频率,校正后的波前残差均值为0.16λ,可以实现千单元级压电变形镜的校正控制。Adaptive optics technology can correct the wavefront error caused by atmospheric turbulence in real time and is the key technology to achieve high-resolution imaging of large ground-based telescopes.As the diameter of a telescope increases,the number of correction elements in the adaptive optics system can reach the order of one thousand.This paper first establishes the equivalent model of the control link of the adaptive optics system from the perspective of automatic control and analyzes the influence of the sys⁃tem delay on the performance of the control link.Then,it discusses the design of the high-voltage drive system in the control link of adaptive optics,analyzes the demand of the adaptive optics system for the closed-loop bandwidth of the high-voltage amplifier from the perspective of automatic control,and pro⁃vides the analysis results.Finally,it describes the integration and test of the high-voltage drive system of the thousand-element adaptive optics system.The experimental results show that the designed high-voltage amplifier can achieve 120 V output,and the bandwidth of-3 dB can reach 5000 Hz.After the inte⁃gration of the designed high-voltage drive system,the turbulence screen is used to simulate the equivalent 60 Hz Greenwood frequency,and the corrected mean residual error of the wavefront is 0.16λ.The de⁃signed high-voltage drive system can achieve calibration control of the thousand-element piezoelectric de⁃formable mirror.

关 键 词：自适应光学 望远镜 自动控制 高压放大器 

分 类 号：TH743[机械工程—光学工程] TM133[机械工程—仪器科学与技术]