空间相机电子设备热设计

Thermal Design of Electronic Equipment in Space Camera

电子设备是空间相机重要发热源,需要通过合理的热设计将热量及时导走,维持电子元器件温度不致过高。根据空间相机各电子设备所处空间环境、结构特点及内部电子元器件热特性,提出了相应的多种不同的热设计方法,采用热仿真分析、热平衡试验两种方法对设计进行了验证,对比了两种方法所获取的温度数据。结果表明两种方法所获取元器件结温均满足温度降额指标要求,且相差不大,充分验证了热设计方案的有效性和仿真分析的准确性。

Electronic equipment is the main heat source of a space camera. The heat must be dissipated through effective thermal design to maintain the electronic components at a proper temperature. There are several electronic equipment in space camera, and they are very different each other in aspects of space environment, configuration and thermal characteristics of inner electronic components. In case-based reasoning, several thermal design methods are presented, and the verification methods of thermal simulation test and thermal balance test are adopted. The temperature data of the two methods are contrasted. These data show that junction temperatures of electronic components can meet derating requirement, and the gaps between them are small. The validity of thermal design and correctness of thermal simulation are proved by the two methods.