激光精跟踪快速控制反射镜结构优化与分析

Structural Optimization and Analysis of Fast Steering Mirror for Laser Fine Tracking

目的对快速控制反射镜进行结构优化与处理,获得满足设计要求的轻量化结构。方法选取合适的加工材料,建立以结构柔度最小为目标的优化数学模型进行拓扑优化,对优化后提取的结构模型进行处理和有限元仿真分析。结果通过优化与分析,确定了反射镜最终结构,模拟分析结果表明,镜面最大变形量为2.7 nm,基频为4130.3 Hz,均满足设计要求。优化前后相比,结构质量降低了57.8%。结论优化结果较好满足了设计要求,对于类似结构的设计具有一定的参考作用。

To get the lightweight structure of fast steering mirror to meet design requirements through structural optimiza- tion and treatment. The appropriate processing material was selected. The optimization mathematical model was established with minimizing the structural flexibility as the optimization objective. New model after optimizing was studied by numerical simulation analysis. The reasonable structure was obtained through optimization and analysis. Results showed that the maximum deformation of the mirror reached 2.7 nm and the fi.mdamental frequency was 4130.3 Hz, both of which sufficed requirement of the design. The structural weight was lower by 57.8% after optimization than before. The results of optimization are satisfactory, which can be used as reference for the design of similar structures.