某高空飞艇光学吊舱热状态及飞行策略研究

Thermal Analysis and Strategy of Optical Gondola under a Stratosphere Airship

使用光学遥感设备开展地球大气层临边观测是研究中高层大气目标特性变化规律的重要手段之一.光学遥感设备的热状态对其光学精度及系统信噪比控制至关重要,能够直接影响观测数据质量乃至观测任务的实现.针对中高层大气OH自由基超分辨空间外差光谱仪在高空飞艇平台探测的热状态需求,分析了光谱仪吊舱的热环境,给出了光学吊舱的热平衡控制方程,并对上升/下降段和平飞段先后开展了热状态计算,得到光学吊舱在不同状态下的温度变化规律、光电部件的温度场等计算结果.结果表明热控方案能够满足光谱仪的热状态需求.根据热状态分析计算结果,制定了飞行前后及飞行过程中光学吊舱的热控策略.本文分析方法和飞行策略可为同类飞行设备热控状态设计及研究提供数据参考.

Earth limb atmospheric optical observation is one of the important means to study the variation of the characteristics of the middle and upper atmosphere targets.Thermal state of optical remote sensing equipment is very significant to its optical accuracy and SNR control,which directly affects the quality of observation data and the realization of observation task.It is a feasible method to detect mesospheric OH-radicals accurately based on the high-altitude airship platform.A reasonable thermal state is essential to ensure the performance of Spatial Heterodyne Spectrometer(SHS) under a stratosphere airship.In order to meet the thermal control requirements,the thermal environment of the optical gondola and airship is analyzed,and then the thermal mathematical model is established quantitatively.Temperature variations of two typical states,ascent phase and floating phase,are calculated and analyzed successively.The results show that the temperature field and the thermal control measurements can satisfy the temperature control requirement of optical and electronics components.Finally thermal strategy of flight test is analyzed and made correspondingly based on the calculation results of temperature field and heaters.The suggestions for improvement are given,such as increasing initial temperature and total heat capacity,lens protection measures and flexible thermal conduction band for CCD.The analysis method and flight strategy can be used as a useful reference for the design and development of thermal control status of similar equipment.