某机载光电吊舱热环境下光轴平行性建模与分析  

Study of Spectral Axes Parallelism of an Airborne Optoelectronic Pod in Thermal Environment

作　　者：迟圣威[1] 朱镭[1] 杨光[1] 杨晓强[1] 徐红伟[1] 

机构地区：[1]西安应用光学研究所,陕西西安710065

出　　处：《机械与电子》2014年第4期46-49,共4页Machinery & Electronics

摘　　要：针对某机载光电吊舱光轴的热变形问题,在国内外吊舱光轴平行性测试方法的启发下,提出了一种基于有限元仿真的计算模型。选取其中作为传感器直接载体的光具座进行研究。建立光具座系统的有限元模型,来分析温度变化对各传感器光轴之间平行性的影响。首先在HyperMesh软件中生成高质量的六面体网格。随后在ANSYS软件中使用集中质量点在传感器的质心位置模拟传感器光轴。和光具座刚性联接。同时选取室温为热应变基点,激光传感器光轴为基准轴,分别得到高温和低温下其余光轴在方位方向和俯仰方向的相对偏转角度。分析结果表明,光具座本身满足设计和使用要求。For the thermal deformation problem of spectral axis in airborne optoelectronic pod ,tes-ting at home and abroad optical axis parallelism in-spired ,a simulation model based on FEM is put forward .The optical bench selected as direct sensor carrier is studied .T he finite element model of opti-cal bench system are established to analyze the in-fluence of temperature load on the parallelism be-tween spectral axis of each sensor .High quality hexahedral meshes are generated in HyperMesh software and lumped mass is used to simulate spec-tral axis ,w hich is located in centroids position of＆nbsp;sensor and connected with optical bench rigidly . Room temperature is selected as thermal strain point and laser sensors are selected as reference ax-is ,the relative deflection angle of the optical axis in the direction and pitch range in high and low tem-perature conditions respectively .T he simulation re-sults indicates that the optical bench meet design requirements .

关 键 词：光轴平行性 光轴建模 网格生成 热变形计算 

分 类 号：V24[航空宇航科学与技术—飞行器设计]