Diagnosis Method of Exception Sound Using Trajectory Parallel Measure in Engine Faults
Xu Guanghua£¬Jia Weiyin£¬Hou Chenggang£¬Liang Lin£¬Liu Dan
(School of Mechanical Engineering,Xi'an Jiaotong University,Xi'an 710049,China)

Abstract£ºAn idea for diagnosis exception sound is presented£®The Continuous Wavelet Transform £¨CWT£© is used to purify the original sound signal and identify the source of faults£® Meanwhile£¬the feature parameter of non¡Mstationary for sound signal is extracted applying the trajectory parallel measure of chaos technique£® At last£¬the character index of dynamics orbit in the observed time series is selected£®Fault diagnosis for engine by using sound signal is illustrated. The result shows that this technique provides a new tool for diagnostic of sound signal£®
Keywords£ºsounds signal£»continuous wavelet transform denoising£»trajectory parallel measure