针对“纯净”工质模拟系统随动性、快速性的特点,首先对“纯净”工质模拟系统进行机理特性分析,划分各子系统模块;然后对其建立数值模型,利用Matlab软件对数值模型进行仿真;最后根据仿真数据结果对模型参数进行系统辨识并比较模型的相似性。结果表明:系统辨识后的控制模型可以对系统辨识前的数值模型进行替代,控制模型能够达到“纯净”空气工质模拟控制方法的需求。 According to the characteristics of follow-up and fastness of “pure ” working fluid simulation system, firstly, the mechanism characteristics of “pure ” working fluid simulation system are analyzed and the sub-system modules are divided; then the numerical model is established, The software simulates the numerical model. Finally, the model parameters are systematically identified and the similarity of the models is compared according to the results of the simulation data. The results show that the control model after system identification can replace the numerical model before system identification, and the control model can meet the requirement of “pure” airborne simulation control method.