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压电式倾斜镜迟滞特性及其实验研究

Hysteresis Characteristics of Steering Mirror Driven by Piezoelectric Actuator and Its Experimental Research

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摘要

空间激光通信精瞄系统中压电式倾斜镜存在的迟滞非线性特性,不仅降低了精瞄系统定位精度,而且对信标光的捕获以及链路的稳定性造成影响。针对该问题,提出一种基于PLAY迟滞算子改进Prandtl-Ishlinskii(P-I)数学模型及参数辨识方法,利用该模型对迟滞特性进行前馈线性化逆补偿。为进一步提高系统跟踪精度,在线性化的基础上,设计了静态输出反馈控制器,形成复合控制方法,并设计了激光通信终端精瞄系统实验,验证了该复合方法的有效性。通过对系统输入不同频率等幅和减幅正弦控制信号进行测试,结果表明,改进P-I模型最大拟合误差在1%之内,前馈模型逆补偿使压电陶瓷执行器(PEA)的线性度误差由5%减小到1%以内,复合控制方法系统跟踪误差降低了80%。

Abstract

In a precision pointing system for space laser communication, the hysteresis nonlinearity of the steering mirror driven by the piezoelectric actuator (PEA) can not only reduce its pointing accuracy greatly, but also affect the acquisition of beacon light and link stability. To address this issue, an improved Prandtl-Ishlinskii (P-I) model based on the PLAY hysteresis operator and a parameter identification method are presented, and on this basis, a feedforward linearized inverse compensation method for the steering mirror is proposed. In order to further improve the tracking accuracy of the system, on the basis of linearization, a static output feedback controller is designed to form a composite control method, and a laser communication terminal precision sighting system experiment is designed to verify the effectiveness of the composite method, in which sine signals with different frequencies and amplitudes are input. Experiment results show that the maximum fitting error of the improved P-I model is less than 1%. Inverse compensation of the feedforward model can reduce the linearity error of the PEA from 5% to less than 1%. Tracking errors of the system based on the compound method are reduced by 80%.

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补充资料

中图分类号:TP394.1;TH691.9

DOI:10.3788/aos201838.0814002

所属栏目:激光器与激光光学

基金项目:国家科技重大专项(2009ZX02207)、国家自然科学基金(51537002)、国家自然科学基金青年科学基金(61503096)

收稿日期:2018-01-25

修改稿日期:2018-03-28

网络出版日期:2018-04-09

作者单位    点击查看

于志亮:哈尔滨工业大学航天学院, 黑龙江 哈尔滨 150001
姜晓明:上海机电工程研究所, 上海 200233
曹开锐:哈尔滨工业大学可调谐激光(气体)技术国家级重点实验室, 黑龙江 哈尔滨 150001
李松:哈尔滨工业大学航天学院, 黑龙江 哈尔滨 150001中国科学院沈阳自动化研究所, 辽宁 沈阳 110016
王岩:哈尔滨工业大学航天学院, 黑龙江 哈尔滨 150001

联系人作者:曹开锐(caokairui1984@139.com); 于志亮(yuzl@hit.edu.cn);

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引用该论文

Yu Zhiliang,Jiang Xiaoming,Cao Kairui,Li Song,Wan Yan. Hysteresis Characteristics of Steering Mirror Driven by Piezoelectric Actuator and Its Experimental Research[J]. Acta Optica Sinica, 2018, 38(8): 0814002

于志亮,姜晓明,曹开锐,李松,王岩. 压电式倾斜镜迟滞特性及其实验研究[J]. 光学学报, 2018, 38(8): 0814002

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