基于小波变换的航空发动机性能衰退率计算方法

Computing Method of Gas-turbine Performance Degradation Rate Based on Wavelet Transform

由于航空发动机的工作环境复杂,性能参数测量值中夹杂的工况信息和测量误差会对发动机的性能衰退率计算产生较大的影响。为了弱化工况信息和测量误差对航空发动机性能衰退率计算的影响,本文首先运用多层小波分解与重构的方法对原始性能参数进行了趋势分量的提取,进而运用线性回归的方法对航空发动机的性能衰退率进行了计算。经过实际运维数据的验证,本文提出的航空发动机性能衰退率计算方法能够为实际工程应用提供理论支持。

Because the working environment of a gas turbine is complex, the measurement error is in the parameter. To compute the performance degradation rate of gas turbine more accurately, a computing method based on wavelet transform is proposed. Wavelet transform is adopted to extract trend component of the performance data. The linear regression model is used to compute the performance degradation rate of gas turbine. The real-life performance parameters are used to verify the practicability of the computing method.