中文摘要：

为了给载人航天器乘员营造一个良好的生活工作环境，需要将众多空气环境参数控制在指标范围内。文章结合载人航天器专业知识，基于Modelica统一建模语言建立了一种载人航天器环热控系统仿真分析模型；利用该模型仿真分析了温湿度控制风机取不同转速时，载人航天器空气环境参数随乘员代谢水平的变化趋势。结果表明：在其他参数不变的情况下，温湿度控制风机转速越大，空气温度越低，相对湿度越高；乘员代谢水平变化对空气环境参数有显著影响，通过调节系统运行参数可将各空气参数有效控制在指标范围内。舱体温度与氧分压、二氧化碳分压、舱体相对湿度有密切关系且相互影响，不可单独分析。

英文摘要：

In order to support an adequate residence for the crew,the key air environment parameters of themanned spacecraft should be controlled within an index range with the environmental and thermal controlsystem,which involves a number of design and operational parameters.With the professional knowledge and themodeling language of Modelica combined,a simulation model for the manned spacecraft environmental andthermal control system is developed.With this simulation model,the relation between the air environmentparameters and the crew metabolic level is studied from the system level with different speed ranges of thetemperature and humidity control fan.According to the results,it is shown that in the case of other parameterskept unchanged,the greater the temperature and humidity control fan’s speed is and the lower the airtemperature is,the higher the relative humidity will be;the crew metabolic level could influence the airenvironment parameters dramatically.The air environment parameters could be maintained within the indexrange though regulating the control system operational parameters.Furthermore,the air environment parameterscould not be analyzed separately due to the non-negligible effects of the air temperature on the oxygen partialpressure,the carbon dioxide partial pressure and the relative humidity.