航空氧气减压器性能仿真分析

Simulation on pressure regulator characteristic

对战斗机用供氧系统氧气减压器结构及工作原理进行分析,以逆向式减压器为研究对象,通过理论简化结构模型和气体动力学原理,建立了减压器稳态和动态数学模型.利用MATLAB/Simulink进行了减压器性能的数值仿真计算,从理论解析和仿真结果两方面综合分析了减压器的稳态特性和动态特性,通过对仿真计算结果与试验结果的对比分析,表明所建立的数学模型是准确的,采用的仿真计算方法符合计算精度要求.以此为基础分析了减压器的结构参数对其静态特性的影响,找出了影响减压器动态特性的主要因素,对减压器的设计和改进工作具有很好的参考作用.

The pressure regulator＇s structure and working process in aviation oxygen supply system（OSS） were explored and discussed.Based on reverse-type pressure regulator,combining with the theoretic structural model and dynamics of gas flow,the mathematic models for steady and dynamic characteristics were built.By the numerical simulation on MATLAB/Simulink and the theoretic analysis to regulator performance,the steady and dynamic characteristics of regulator were analyzed.The simulation results are in good agreement with those measured in the experiment.They show that the analytical models are correct and the simulation method is in accordance with the precision requirements.By using the mathematic models and the simulation method,the affection to the steady characteristic by regulator structural parameters is analyzed and the major parameter is found to affect the dynamic characteristics.The study and its conclusions are useful for the design of congener regulators and the system analyses.