基于LabVIEW的发动机仿真测试系统开发与应用

摘要

发动机工作过程复杂,运转速度过快,导致测试其性能时只能采用实车检测的方法;对高性能数据采集和半实物仿真技术进行了研究,提出了一种基于LabVIEW的电控发动机半实物仿真测试系统;将电控发动机ECU和其它实物部件直接放人仿真回路中,根据机械动力学、热力学规律和大量实验数据,建立发动机的数学模型;通过LabVIEW测控程序并设置运行环境及发动机参数,可获取电控发动机的工况和性能;统计相同条件下,仿真系统和真实发动机之间反馈信号的误差,结果表明:测试系统能够满足实时性要求,测试结果准确;该系统节约了电控发动机的开发成本,缩短了开发周期.%An engine simulation test system based on LabVIEW is put forward in this paper. Using the principle of kinetics, thermodynamics and empirical data, the paper established the dynamic model of the Electron-controlled engine. By putting the ECU and other controllers into the simulation loop, a semi -physical simulation system of the electron-controlled engine has been designed. From LabVIEW we can set the parameters of the engine and the environment, and then find the operating mode and the performance of the engine. This system can satisfy the requirement of real-time and veracity. It economizes the cost and shortens the period of developing the engine.