基于过程建模的环控生保系统动态仿真

发布时间：2018-10-25 16:03

【摘要】：目的在环控生保系统设计初期通过系统仿真的手段完成物质流计算以及方案验证与评估,为后续设计提供数据支撑。方法针对一类典型的基于物化再生技术的环控生保系统建立了动态过程模型,并进行了仿真。其中,包括密闭舱大气环境变化模型、航天员代谢过程模型、电解制氧过程模型、CO2去除过程模型、缓冲池模型(水箱、气瓶等)以及各控制算法(压力控制算法、电解制氧工作流程、CO2去除工作流程等)。结果仿真结果表明,当水处理子系统每天生成电解水的能力应不小于3.14 kg/d,密闭舱总压不会小于87 Kpa,氧分压稳定在21至23 Kpa之间,水闭合程度不大于77%。结论仿真结果真实、准确的展示了基于物化再生技术的环控生保系统内物质流动态转移过程以及密闭舱内大气总压、氧分压以及CO2分压的动态变化过程,为方案验证提供了有力的数据支撑。
[Abstract]:Aim in the early stage of design of EHSS, material flow calculation, scheme verification and evaluation were completed by means of system simulation to provide data support for subsequent design. Methods A dynamic process model for a class of typical environmental control and life support systems based on physicochemical regeneration technology was established and simulated. Among them, the model of atmospheric environment change in closed chamber, the model of astronaut metabolism process, the model of electrolytic oxygen production process, the model of CO2 removal process, the model of buffer tank (water tank, gas cylinder, etc.) and the control algorithms (pressure control algorithm), Electrolytic oxygen production process, CO2 removal process, etc. Results the simulation results show that when the capacity of water treatment subsystem to generate electrolytic water per day should not be less than 3.14 kg/d, the total pressure of closed chamber should not be less than 87 Kpa, oxygen partial pressure is stable in the range of 21 to 23 Kpa and the water closure degree is not greater than 77. Conclusion the simulation results show the material flow state transfer process and the dynamic change process of total atmospheric pressure, oxygen partial pressure and CO2 partial pressure in the sealed cabin based on physicochemical regeneration technology. It provides strong data support for scheme verification.
【作者单位】：中国航天员科研训练中心人因工程重点实验室;
【基金】：载人航天领域预先研究项目
【分类号】：R852.82

【共引文献】