Fault Feature Eztraction Method of Time-Frequency Image Based on Fractal Dimension
A fault feature extraction method of time-frequency image based on fractal dimension is put forward in this paper. Theoretical calculation formulas of fractal dimension are introduced and the calculation method about boxcounting dimension based on image processing is analyzed. Based on this, the vibration signals measured from diesel engine in the stage of deflagration are researched with smooth slice Wigner higher order moment spectrums. Then the dimensions of fractal images which were obtained from the signal waves and the Wigner higher order moment spectrums are calculated by the fractal dimension calculation program. The result indicates that different wearing stages of pistun-cylinder can be discriminated depending on feature parameters of fractul dimension because the fraetal dimensions of images are apparently different.
fractal dimension fault Feature Eztraction vibration signal time-frequency image
Hao Zhihua Tian LiXin
Dept.of Information Engineering Tangshan College Tangshan,China,063000
国际会议
长沙
英文
658-660
2009-04-11（万方平台首次上网日期，不代表论文的发表时间）