紫外-近红外高光谱探测仪扫描镜拓扑优化设计

Topology optimization of scanning mirror of UV to near-infrared hyperspectral detector

为了研究某紫外-近红外高光谱探测仪扫描镜工作在运动状态的轻量化问题,提出了以扫描镜动态面形为设计约束的拓扑优化方法。对设计约束进行了有效的简化,降低了计算的复杂程度。使用拓扑优化方法得到了在转动条件下扫描镜的最优轻量化形式。分析结果表明,拓扑优化后的扫描镜轻量化率为47.3%,动态面形PV值和RMS值分别为19.36 nm和5.65 nm,比优化前分别提高了18.45%和17.40%,同时,扫描镜的一阶频率提高了113.8 Hz。分析结果说明了以动态面形为设计约束进行扫描镜拓扑优化的合理性。

In order to study the lightweight issues of the scanning mirror of the UV to near﹣infrared hyperspectral detector while the mirror was rotating, the topology optimization method based on the constrain of dynamic deformation was proposed. Simplifications were carried out to reduce the calculation complexity of the design constrains. With the topology optimization method, an optimal lightweight form of the scanning mirror was obtained on the condition of rotation. The result shows that the lightweight ratio of the optimized scanning mirror is 47.3%. For the optimized structure, the PV value is 19.36 nm and the RMS value is 5.65 nm, which are improved by 18.45% and 17.41% compared with the initial scanning mirror, respectively. At the same time, the first order frequency of the scanning mirror increases by 113.8 Hz. The results illustrate that the topology optimization method with the constrain of the dynamic deformation of the scanning mirror is reasonable and effective.