Research on Ultrasonic Leakage detection of Military Aircraft Gas System

The method of bandpass digital filter, chaos theory and AR model spectrum estimation was used to test the ultrasonic signal of airplane gas system leakage from strong background noise on airport. The design and method based on the theory were given and simulated by Matlab/simulink. It was verified that the method can detect the tiny leakage of aircraft gas system and reduce the influence of noise. It is a new leakage detection of aircraft gas system.