KM6环控系统的湿度调节过程的数字仿真

Digital Simulation of Humidity Adjusting Course in Environmental Control System of KM6

KM6载人试验容器环控系统是在地面实验室为宇航员提供一定的氧氮比率和一定温湿度气体的系统,该系统采用超声波雾化器为系统加湿。该文介绍了环控系统的湿度调节方法,并建立了湿度调节过程中,加湿装置的的动态数学模型、气体湿度在管路中变化的数学模型及湿度传感器的数学模型,并用这些模型在Matrixx软件上进行仿真。仿真结果表明在试验舱温度较低、压力较高的情况下,能调节的最大相对湿度较大,反之较小。在试验舱温度高于一定值、压力底于一定值的情况下,系统调节的相对湿度达不到70%,这只能通过降低试验舱温度、升高其压力;或通过降低微调室的压力来达到。

The environmental control system of a space simulation vessel of KM6 is used to supply the gas with a certain temperature and humidity as well as a certain oxygen - to - nitrogen ratio for the ground laboratory. A way for adjusting humidity in the environmental control system of a space simulation vessel has been introduced in this paper. The dynamic mathematical models of this adjusting way has been established. These models have been usecl to build an entire course model of the humidity adjusting system and are simulated by Matrixx. The result of simulation shows that higher humidity can be adjusted under the condition of higher pressure and lower temperature in the vessel, and vice versa. The most relative humility cant be adjusted to 70% under the condition of the pressure lower to a certain value and the temperature higher to a certain value in the vessel. It can be reached only by lowering the temperature or rising the pressure in the vessel, or lowering the pressure in the fine tuning room.