空间遥感器反射镜组件的稳定性研究

Research on Stability of a Reflector Assembly for Space Remote Sensor

空间遥感器反射镜组件的稳定性是影响光学系统成像质量的重要因素。以某型号空间遥感器的反射镜为例,分析了研制过程中影响其稳定性的主要因素,包括支撑结构、装配应力、胶层厚度及固化和温度变化。结合实际研制过程,针对这四个主要因素提出了相应的解决方法,即设计反射镜的柔性支撑结构、设计反射镜组件的微应力装配工艺及调整装置、设计合理的胶层厚度及固化工艺和设定温度及其变化范围。最后进行了力学环境试验、真空热循环试验和温度试验。结果表明,这些方法能够有效保证反射镜组件的稳定性。

The stability of a reflector assembly for a space remote sensor is an important factor which has an influence on the imaging quality of the optical system. By taking the reflector for a certain space remote sensor as an example, the main factors which have influences on the stability of the reflector in its manufacturing process, including the supporting structure, assembling stress, thickness, solidification and temperature variation of the adhesive layer, are analyzed. In the actual manufacturing process, the corresponding solutions for the above factors are proposed. They are design of a flexible supporting structure, design of a micro stress assembling method and device for the reflector assembly, design of a reasonable adhesive layer thickness control and solidification process and setting of a temperature variation range. Finally, the mechanical test, vacuum thermal cycle test and temperature test are carried out. The test results show that these methods can meet the stability requirements of the reflector assembly.