Abstract:In order to make the Aero-engine run safely and reliably, fault diagnosis of it is needed. The paper introduces how to port the embedded operating system which is used to Aero-engine Fault Diagnostics Wavelet analysis is used to extract the characteristic of signal. Signal Analysis is analyzed and processed by selecting the suitable wavelet function on the basis of the principle of wavelet denoising. Through analyzing the engine surge actual measurement data, it can forecast fault. It has made very pleased result through experiment of lots of data and it is important to real time detecting of fault, and it has good prospects.