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压电倾斜镜传递函数辨识方法

Transfer Function Identification Method for Fast-Steering Mirror Driven by PZT

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摘要

针对光轴控制系统中广泛使用的压电倾斜镜,分析了其基本工作原理和数学模型,描述了遗传算法在模型中的辨识过程。针对大口径压电倾斜镜,搭建了频率响应测试系统,实现了对压电倾斜镜传递函数的参数辨识。对比辨识传递函数的频率响应与实际测量数据,并对系统中存在的多个谐振点的辨识精度进行分析。实验结果表明,在各个谐振点处,遗传算法获得的传递函数频率响应与实际测量数据具有较高的一致性,利用该算法得到的传递函数能更为准确地分析光轴控制系统的动态特性,有针对性地设计先进的控制算法,从而达到提高光轴控制系统性能的目的。

Abstract

The basic working principle and mathematical model for a fast-steering mirror driven by PZT, which is a type of mirror widely used in optical-axis control systems, are analyzed, and the identification process of genetic algorithms in the model is described. A system for measuring the frequency response of a large-aperture fast-steering mirror driven by PZT is set up to realize parameter identification for the transfer function. The frequency response of the identified transfer function and the actual measured data are compared, and the identification accuracy of multiple resonance points in the system is analyzed. The experimental results show that at each resonance point, the frequency response of the transfer function obtained by the genetic algorithm is consistent with the measured data. The results also show that the transfer function obtained by this algorithm can analyze the dynamic characteristics of optical axis control system more accurately, and we can design advanced control algorithm, thus improving the performance of the optical-axis control system.

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中图分类号:TH74

DOI:10.3788/CJL202047.1105002

所属栏目:光束传输与控制

基金项目:四川省科技厅重点研发项目、中国民用航空飞行学院科研基金;

收稿日期:2020-05-06

修改稿日期:2020-06-28

网络出版日期:2020-11-01

作者单位    点击查看

周睿:中国民用航空飞行学院空中交通管理学院, 四川 广汉 618307
张强:中国民用航空飞行学院空中交通管理学院, 四川 广汉 618307
甘永东:中国科学院自适应光学重点实验室, 四川 成都 610209中国科学院光电技术研究所, 四川 成都 610209
沈锋:中国科学院自适应光学重点实验室, 四川 成都 610209中国科学院光电技术研究所, 四川 成都 610209

联系人作者:张强(zhangqiang_ioe@126.com)

备注:四川省科技厅重点研发项目、中国民用航空飞行学院科研基金;

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引用该论文

Zhou Rui,Zhang Qiang,Gan Yongdong,Shen Feng. Transfer Function Identification Method for Fast-Steering Mirror Driven by PZT[J]. Chinese Journal of Lasers, 2020, 47(11): 1105002

周睿,张强,甘永东,沈锋. 压电倾斜镜传递函数辨识方法[J]. 中国激光, 2020, 47(11): 1105002

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