An Analysis of Vehicle Engine Vibration Signals with Digital Order Tracking Approaches
This chapter presents an application of Digital Order Tracking to vibration signal analysis of automobile engines. By using a tacho probe to detect the variation of engine speeds and an accelerometer to collect the vibration signals of the engine,the FFT-based analysis are performed in order spectra. Data processing is implemented by digital manipulation—adding zeros, interpolations, oversampling and resampling. Zoom factor D and decimation d are thoughtfully selected. A comparisons between tracking and non-tracking spectra is made and the order spectra are plotted in different forms. Referring to the analyzed results, a successful engine diagnoses have been presented.
KeywordsOrder tracking Zoom factor Decimation Interpolation Resampling
- 1.SHAO W, ZHANG SL(1998) “Digital order-tracking on vibration signals of automobile engines” [J], JSAE spring convention. pp: 221–224Google Scholar
- 2.Gade S, Herlufsen H (1995) “Order tracking analysis” [J]. Bruel & Kjaer, technical review, No. 2, pp: 5–10Google Scholar
- 3.S.Zhang (1992) “Vibration measurement and analysis techniques”. [M].Beijing: Publish House of Qinghua UniversityGoogle Scholar
- 4.Shao ZA (1994) “Advanced techniques for acoustic noise measurements”. [M]. Xi’an: Publish House of Xi’an Jiaotong UniversityGoogle Scholar