导航卫星原子钟舱温度控制方法及其验证

原子钟是导航卫星的重要组成部分,可为卫星系统提供高准确及高稳定度的时间频率源.原子钟工作性能与环境温度变化密切相关,为保证其在轨连续、稳定运行,热控系统需为其提供良好的工作温度环境.本文以某导航卫星原子钟舱温度控制为研究内容,给出原子钟舱热控设计方案、控制算法,并进行仿真分析和试验验证.在轨遥测数据表明,卫星原子钟舱热控方案和控制算法设计合理,仿真分析及试验结果有效,各原子钟在轨工作温度满足要求,原子钟温度稳定度满足并优于设计指标近一个数量级.

Method of Temperature Control and Its Validation for Atomic Clock Cabin on Navigation Satellite

Atomic clock, as an important part of the navigation satellite, provides high-accuracy and high-stability time frequency source for the satellite. For the continuity and stability of atomic clock operation in orbit, the satellite thermal control system should provide a suitable temperature environment for it. In this paper the thermal control design and the control algorithm of atomic clock are introduced, and the results of thermal simulation and tests based on the atomic clock thermal control for the navigation satellite are provided. Temperature data in orbit show that the thermal design of cabin for atomic clock is suitable. Thermal simulation results and the tests are effective. In addition, the temperature of atomic clocks in orbit meets the requirement and is nearly one order of magnitude better than that of the indicator.