气缸式呼吸模拟器数学模型研究  

Research on Mathematical Model of Cylinder Breathing Simulator

作　　者：王一达 卢剑锋[1] 王桂友[2] 李家春[1] WANG Yi-da;LU Jian-feng;WANG Gui-you;LI Jia-chun(School of Mechanical Engineering,Guizhou University,Guizhou Guiyang550025,China;Institute of Aviation Medicine,Air Force,Beijing 100142,China)

机构地区：[1]贵州大学机械工程学院,贵州贵阳550025 [2]空军航空医学研究所,北京100142

出　　处：《机械设计与制造》2019年第10期217-221,共5页Machinery Design & Manufacture

基　　金：车辆动载荷模拟超大型实验舱体关键技术研发(黔科合支撑[2017]2006)

摘　　要：为了更好的进行鉴定飞行员机载氧气系统低压舱高空性能试验,提出一种用于模拟人体呼吸的模拟器,模拟人体在正常环境下以及高低压环境中的呼吸动作,研究呼吸模拟器进出气体质量的实时变化及呼吸阻力等指标参数。通过应用可压缩流体一维定常等熵流动的基本理论,对呼吸模拟器的控制系统进行数学建模,得到了呼吸模拟器气缸内气体质量与时间的函数关系,并对数学模型进行Simulink仿真,与试验得到的实际曲线进行对比分析。结果表明,理论推导的数学模型仿真曲线与呼吸模拟器实际运动得到的实际曲线大致相符,验证了数学模型的准确性。In order to better evaluate the high altitude performance of the low pressure cabin of the airborne oxygen system for pilots,a simulator for simulating human respiration was proposed,which simulated human respiration in normal environment and high and low pressure environment.By applying the basic theory of one-dimensional steady isentropic flow of compressible fluid,the control system of the breathing simulator is modeled mathematically,and the function relation between gas mass and time in the cylinder of the breathing simulator is obtained.Simulink simulation of the mathematical model is carried out,and the actual curves obtained from the experiment are compared and analyzed.The results show that the simulation curves of the mathematical model deduced from the theory are roughly consistent with the actual curves obtained from the actual movement of the breathing simulator,which verifies the accuracy of the mathematical model.

关 键 词：呼吸模拟器 一维定常等熵流动 数学模型 SIMULINK 

分 类 号：TH16[机械工程—机械制造及自动化] TB126[理学—工程力学]