深空探测器真空热环境模拟试验系统

Development of vacuum thermal environment test system for deep space detector

空间环境模拟试验主要用于模拟太空的冷黑环境、真空环境及太阳辐射环境,通过热试验验证航天器温控、结构设计的合理性。深空探测器真空热环境模拟系统有效空间为Φ3.35m×5m,设备主要包括真空容器、热沉、氮系统、真空抽气系统、外热流系统、环境监控系统、测控系统等,试验极限真空度3.2×10^-5Pa,热沉平均温度≤85K,温度均匀性可达3.5K。系统已完成多次整星试验,系统各项指标均优于设计指标要求。

Space environment simulation test is mainly used to simulate the cold-black environment, vacuum environment and solar radiation environment in space, which can verify the rationality of thermal and structural design of spacecraft. The effective space of the vacuum thermal environment test system for deep space detector is 3.35 meters in diameter and 5 meters in length.The equipment mainly includes vacuum vessel, heat sink, nitrogen system, vacuum-pumping system, external heat flux system,environmental monitoring system, measurement and control system. The ultimate vacuum of the equipment is 3.2 ×10^-5Pa, the average temperature of the heat sink is less than 80 K, and the temperature homogeneity of the heat sink is 3.5 K. The equipment has been used for several whole-spacecraft tests, the various technical indexes of the whole system are all superior to the design targets.