Digital signal processing techniques in truck tire vibration and sound analysis

Digital signal processing has some significant advantages in analysis of vibration and sound data. The authors have assembled a multiple channel vibration and sound data acquisition and analysis system that includes FM radio telemetry capability. The FM multichannel recorder of the data acquisition link is interfaced with a large digital computer through a digital waveform recorder and minicomputer. Signal processing is accomplished with software that provides for analysis in both the time and frequency domains. The system components are described. The capability of digital signal processing in cross spectral analysis and in the separation of random and periodic components of signals is discussed. Results of such analyses for truck tire vibration and sound signals are presented.