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本文以发动机系统参数定性分析为基础，对选定的系统参数建立灰色模型。对采入的试验数据通过灰色关联度分析后，利用等维新息模型对灰色模型进行参数辩识，得出定量的发动机系统状态方程组。并对方程组输出的滤波值用红线参数比较分析，确定发动机的状态。预测值作为对新采入数值灰色关联度分析的基准，以确保算法的可靠性和精度。
Based on the qualitative analysis of engine system parameters, this paper establishes a gray model for the selected system parameters. Through the analysis of the experimental data adopted by gray correlation analysis, the parameters of the gray model are identified by using the equal-dimensional information model to obtain the quantitative system equations of the engine system. And the output of the system of equations using comparative analysis of the red line parameters to determine the state of the engine. The predicted value serves as a benchmark for the gray correlation analysis of newly acquired values to ensure the reliability and accuracy of the algorithm.