多自由度热光学真空实验台的设计

Design of heat optics vacuum bench with multi-freedom

针对某项目研制的相机结构特点和空间使用环境复杂性,在发射之前,为获取热光学调焦的规律,核对光机热集成仿真分析模型的正确性,检验输入与边界约束条件,因此要在地面模拟空间热真空环境,完成相机的热光学真空实验。由于相机在真空罐内的环境条件不利于工作人员在内部的操作,为此研制了热光学真空实验台,实现相机在真空罐内姿态方便调节。对实验台的参数进行了计算分析。采用光栅尺或编码器实现闭环控制,润滑采用低挥发的真空润滑脂,实验台的转动精度达到6″,移动精度达到±0.02 mm,能够满足相机的实验调节要求。热光学真空实验台的研制不仅能够完成相机热光学实验的要求,而且在实验时间上大大节省,提高了实验效率,有利地保证相机实验的顺利完成。

Aiming at structure characteristics of camera space environment, the camera thermal vacuum optical developing in some project and the complexity of experiments are fulfilled prior to launch, in order to obtain the law of the thermal optical focusing, to check the correctness of the integrated simulation model, test input and boundary conditions. Space thermal vacuum environment is so simulated on the ground. As the environmental conditions of the vacuum tank for the camera is not conducive to staff to operate. The development of vacuum thermal optical bench is very important, to achieve the convenient adjustment of the camera posture in a vacuum tank. Some parameters of bench were calculated. The grating scale or encoder was adopted to achieve closed-loop control. The vacuum grease for lubrication of low volatile was adopted. The bench rotation accuracy is 6″. Mobile accuracy is ±0.02mm. The bench accuracy can meet camera experiment adjustment requirements. Thermal optical vacuum test platform is not only able to complete the requirements of the camera thermal optical experiments, but also to save experimental time in significantly and improve the experimental efficiency, favorable to ensure the successful completion of the camera experiment.