Design and analysis of a bi-axial centralized butterfly flexure hinge for fast steering mirrors

铰链 有限元法 带宽(计算) 固有频率 结构工程 流离失所(心理学) 计算机科学 工程类 声学 物理 振动 心理学 计算机网络 心理治疗师
作者
Lei Zhao,Hu Wang,Wenbo Duan,Pu Wang,Qingqing Wu,Xinming Wang
出处
期刊:Journal of Astronomical Telescopes, Instruments, and Systems [SPIE]
卷期号:6 (04) 被引量:8
标识
DOI:10.1117/1.jatis.6.4.048003
摘要

A bi-axial centralized butterfly flexure hinge for a fast steering mirror (FSM) was presented to adapt highly stabile accuracy of beam-pointing control performance in space laser communication. According to the requirements of two-dimensional reciprocating movements and high bandwidth provided for the FSM, the solid model of the bi-axial centralized butterfly flexure hinge was designed. By applying Castigliano's displacement theorem, the numerical model was simplified and deduced. Furthermore, to quantify the numerical model, natural frequencies of the finite-element analysis (FEA) and experiments were carried out the results of which were compared with the analytic solutions. The experimental results show that the in-plane natural frequencies are 66.37 and 112.2 Hz, respectively. The comparison shows that the errors between numerical analytic and experimentation are 3.0% and 1.4%, respectively, and errors between FEA and experimentation are 1.7% and 2.4%, respectively. It is proven that the bi-axial centralized butterfly flexure hinge we built is an appropriate structure as a two-axis guide mechanism in two-dimensions for an FSM system with a large bandwidth of 225 Hz.
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