基于联合仿真的飞机空调系统故障影响

飞机空调系统是飞机的重要组成部分，由于其在飞行过程中环境和工作参数变化较大，易于受到多种因素的影响而成为故障率较高的飞机系统之一。飞机空调系统故障主要发生在飞行过程中，在地面状态难以复现，因此基于联合仿真的飞机空调系统故障影响分析对飞机设计验证和地面维修具有重要意义。首先根据飞机空调系统原理建立了冲压空气进气口模型、发动机压气机模型、压力调节与预冷组件模型、制冷组件模型；然后基于AMESim-Simulink联合仿真平台，模拟飞行过程中空调系统组件性能动态变化过程；最后对典型故障如预冷器泄漏、预冷器空气活门卡死、压力传感器冲击、冲压空气进气作动筒卡死等故障进行模拟，再现了飞行过程中空调系统故障情况，分析了空调组件性能的变化过程。

Fault impact of aircraft air conditioning system based on joint simulation

The air conditioning system, being an important part of the aircraft, is one of the systems with the highest failure rate, because its performance is highly related to many factors such as the external environment and the operating parameters during flight. Since the air conditioning system faults mainly occur during flight, they are hard to reproduce in ground tests. Therefore, fault impact analyses of the aircraft air conditioning system based on joint simulation is of remarkable significance for the aircraft design verification and ground maintenance. This study first establishes the ram air inlet model, the engine compressor model, the pressure regulation and pre-cooling component model, and the refrigeration component model according to the principle of aircraft air conditioning system. The dynamic change process of the air conditioning system component performance during flight is then simulated based on the AMESim-Simulink joint simulation platform. Finally, typical faults such as precooler leakage, precooler air valve stuck, pressure sensor impact, ram air intake actuator stuck are simulated, reproducing the faults of the air conditioning system during flight and analyzing the change process of air conditioning component performance.