Abstract
There are several acoustic and vibration methods for detecting mechanical failure of the machine. However, this type of diagnostics is not widespread in motor vehicles. This is due to the rather complex noise and vibration behavior during operation caused by the internal combustion engine, auxiliary equipment, drivetrain, rolling noise and flow-induced noise and vibration. This article deals with the arrival time difference method for vehicle diagnostics. We present the main features of the method and first apply the method to a single rectangular steel plate as well as to a passenger car body in experiments with pulse hammer simulated failure sources. We present three options for calculating time delays between sensors: the cross-correlation method, the generalized cross-correlation method, and the threshold crossing method. Based on the time delays, we calculate the calculated coordinate of the simulated error and compare it with the actual value. Conclusions are drawn and ideas for future work are also presented.
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