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引入流量因子和效率因子,通过在稳态模型中修改流量因子和效率因子,模拟几种性能失效形式,分析了它们引起压气机和涡轮测量参数的变化。以发动机稳态模型为基础,构建优化部件性能参数的非线性约束模型,得到部件性能参数的衰退过程。在得到的性能参数基础上,代入到发动机稳态模型,得到对应的测量参数,同时滤掉噪声的干扰。又运用雅克比矩阵建立部件性能参数与测量参数的对应关系,得到的测量参数与非线性结果进行比较,证明了非线性约束模型计算发动机测量参数的优越性。
By introducing flow factor and efficiency factor, several performance failure modes are simulated by modifying flow factor and efficiency factor in the steady-state model, and they are analyzed to change the measurement parameters of the compressor and turbine. Based on the steady-state model of the engine, a nonlinear constraint model was established to optimize the performance parameters of the components, and the decay process of the components’ performance parameters was obtained. On the basis of the obtained performance parameters, it is substituted into the steady state model of the engine to obtain the corresponding measurement parameters, meanwhile, the noise interference is filtered out. By using the Jacobi ratio matrix, the corresponding relationship between the performance parameters and the measured parameters is established. The measured parameters are compared with the nonlinear results. The superiority of the nonlinear constraint model in calculating the engine measured parameters is proved.