非正常情况下民机座舱压力控制系统性能分析

非正常情况下,民机座舱压力控制系统难以进行地面验证,为了解决该问题,从工程实际出发,建立系统数学模型,开展全飞行包线内系统性能仿真分析;同时,针对非正常情况(包括单空调组件故障、应急卸压、爆炸减压)下的系统性能进行仿真分析。结果表明:单组件故障时对座舱压力影响较小;飞机应急卸压时满足适航要求;爆炸减压时卸压很快,不同破孔面积对应的减压时间差别很小。

Analysis of Civil Aircraft Cabin Pressurization System Performance under abnormal conditions

Based on the establishment of system mathematic models for civil aircraft cabin pressurization system, simulate and analyze system performance under flight envelope, as well as its performance under abnormal conditions, such as single failure of air conditioning pack, emergency depressurization and burst depressurization. The result shows that single failure of air conditioning pack has little influence on system performance, and emergency depressurization can meet the requirement of airworthiness standards. For burst depressurization, cabin depressurizes fastly using near the same pressure dump time with different leak area.