载人航天器密封舱温湿度独立控制方法及实验研究

针对目前载人航天器密封舱温湿度控制存在的强耦合问题，提出了一种基于绝对含湿量控湿的温湿度独立控制方法，设置中温和低温两个热控回路，并通过中温温控阀和低温温控阀的独立调节，进行冷凝干燥器组件控湿和气液换热器控温的双目标控制，实现了密封舱空气温湿度解耦控制，以满足精细化控制的需求。文章给出了密封舱温湿度独立控制系统的典型系统配置及控制策略，并搭建地面实验验证系统开展了相关实验验证工作。实验结果表明采用温湿度独立控制方法可以达到温度±0.5℃、湿度±2%RH的良好控制效果。

Temperature-humidity independent control method for manned spacecraft sealed-cabin and its experimental validation

For a strongly coupled temperature and humidity control system for a manned spacecraft sealed-cabin（mssc-THCS）, a temperature-humidity independent control method（THICM） based on the absolute humidity control is proposed. The THICM contains two independent thermal control liquid loops： the moderate temperature loop （MTL） and the low temperature loop（LTL）, and through the independent regulation of the MTL thermal control valve（MTL-TCV） and the LTL thermal control valve（LTL-TCV）, a dual goal decoupling control of the humidity control based on the CHX（condensing heat exchanger） and the temperature control based on the gl-HX（gas-liquid heat exchanger） is implemented to meet the strict requirement of the mssc-THCS. Typical system configurations and the control strategy of the temperature-humidity independent control system for a manned spacecraft sealed-cabin（mssc-THICS） are presented, and the ground-based experiment validation system is built to carry out the validation experiment related with the temperature-humidity independent control. The experiment results show that good control effects of the temperature within ＋0.5 ~C and the relative humidity within ＋2% are achieved, which lays a good foundation for the engineering application in the mssc-THICS.