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一种用于红外光电系统的新型压电陶瓷扫描镜的反馈控制

Feedback Control of a New Kind of FSM for Infrared Opto-electric System

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摘要

由于高精度位移传感器体积大、价格高,系统传递函数复杂难以辨识等因素,目前对于压电驱动的FSM 大多通过前馈补偿的方法进行开环控制。为了实现对一种新型三支撑三维FSM 的反馈控制,本文基于电阻应变片构建了反馈信号进行采集的系统,先用电阻应变片采集压电陶瓷得输出位移,然后通过标定系统将其转化为反射镜的偏转角度。并在此基础上,对系统的开环传递函数进行了辨识,得到了一个七阶的传递函数。实验证明,反馈信号采集系统能够兼顾体积和精度,所获得的传递函数能够较好地拟合该系统的动态特性,为后续控制算法的设计实现奠定了很好的基础。

Abstract

Because precise feedback sensors are expensive and their transfer function is very complex, most FSM(fast steering mirrors) driven by PZT(PbZrTi03) use open-loop control technology. To implement closed-loop control for a new kind of three-dimensional FSM driven by three piezo ceramics, this thesis builds a feedback-signal acquisition system that uses a resistance strain gauge to obtain the linear displacement of the PZT, which is subsequently translated into angular displacement of the mirror through a calibrationsystem. As a basis for this acquisition system, the open-loop transfer function model of an FSM system was studied. The RLS(recursive least square) algorithm was used for parameter identification, and a transfer function model of the system was built successfully. Experimental results show that the feedback-signal acquisition system has high precision and the advantages of a small volume. The transfer function model fit the system acceptably.

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中图分类号:TN216

所属栏目:系统与设计

收稿日期:2016-04-10

修改稿日期:2017-03-30

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赵灿兵:昆明物理研究所,云南 昆明 650023
周春芬:昆明物理研究所,云南 昆明 650023
胡志斌:昆明物理研究所,云南 昆明 650023
刘 鹏:昆明物理研究所,云南 昆明 650023
王 杰:昆明物理研究所,云南 昆明 650023
陈大乾:昆明物理研究所,云南 昆明 650023

联系人作者:赵灿兵(234983973@qq.com)

备注:赵灿兵(1988-),工程师/硕士,主要研究方向:红外成像技术。

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引用该论文

ZHAO Canbing,ZHOU Chunfen,HU Zhibin,LIU Peng,WANG Jie,CHEN Daqian. Feedback Control of a New Kind of FSM for Infrared Opto-electric System[J]. Infrared Technology, 2017, 39(12): 1083-1086

赵灿兵,周春芬,胡志斌,刘 鹏,王 杰,陈大乾. 一种用于红外光电系统的新型压电陶瓷扫描镜的反馈控制[J]. 红外技术, 2017, 39(12): 1083-1086

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