Analysis of Structural Design and Dynamic Characteristics of Precision Electric Mirror Frame

被引：1

作者：

Qi Lizi ^{[1
]}

Lu Lihua ^{[1
]}

Gao Qiang ^{[1
]}

Jin Hongyu ^{[1
]}

Chen Jiaxuan ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Mechatron & Engn, Harbin 150001, Heilongjiang, Peoples R China

来源：

CHINESE JOURNAL OF LASERS-ZHONGGUO JIGUANG | 2020年 / 47卷 / 03期

关键词：

laser optics; mirror frame; flexible parallel drive mechanism; finite element; modal analysis; dynamic characteristic test; random vibration analysis;

D O I：

10.3788/CJL202047.0301010

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this work, the design of the mechanical structure of a precision electric mirror frame is realized. Through the design and debugging of a micro-drive device and the decoupling operation of the parallel drive mechanism, the motorized mirror frame designed in this work achieves a motion stroke of +/- 7. 5 mrad and a single-step resolution of 0. 3 mu rad. The finite element modal analysis of the mirror frame was conducted to obtain the natural frequency and the corresponding mode shape. Based on this analysis, the dynamic characteristics of the electric mirror frame were tested experimentally. Using the results of the modal analysis and dynamic characteristics test, the random vibration analysis of the mirror frame was conducted, revealing that the stability index of the mirror frame under the influence of ground pulse vibrations is better than 0. 5 mu rad.

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