激光追踪系统机械结构拓扑优化轻量化方法

Methods for topology optimization of lightweight mechanical structures in laser tracking systems

为了解决激光追踪测量系统俯仰平台配重块无法在有限体积内达到平衡所需质量的问题,本文采用拓扑优化理论对俯仰平台连接板及俯仰架的机械结构进行轻量化处理。利用已有代码对模型进行拓扑优化,并对优化结果进行模型重构,对重构模型进行应力分析。仿真实验结果表明:经过优化后的俯仰平台机械结构,连扳优化后直接减重1.65 kg,减重效果达55.7%;俯仰架优化后直接减重0.628 kg,减重效果可达27.9%,并在相同体积、材料下,配重块质量从7.8 kg减重至4.6 kg。本文提出的方法有效解决了激光追踪测量系统配重块体积和质量之间的矛盾,实现了系统机械结构的轻量化。

We adopted a topological optimization theory to solve issues involving balance weights in pitching platforms of laser tracing measurement systems,which cannot reach required masses in a finite volume.This theory was used to optimize the lightweight mechanical structure of connecting plates and the lifting frames of pitching platforms.Stress analysis was performed on a model that was reconstructed via topology optimization using code from reference[17].Simulation results showed that the weight of the optimized mechanical structure of the pitching platform was reduced by 1.65 kg,with a weight reduction of 55.7%.After optimization,the weight of the pitch frame was reduced by 0.628 kg,with a weight reduction of 27.9%,and the weight of the counterweight was reduced from 7.8 kg to 4.6 kg using the same volume and material.This proposed method effectively solves the contradiction between the volume and mass of the counterweight toward a lightweight mechanical structure in laser tracking measurement systems.