Shock and Vibration

Shock and Vibration / 1995 / Article

Open Access

Volume 2 |Article ID 721969 | 8 pages |

Application of Choi—Williams Reduced Interference Time Frequency Distribution to Machinery Diagnostics

Received07 Mar 1995
Accepted22 Jun 1995


This article discusses time frequency analysis of machinery diagnostic vibration signals. The short time Fourier transform, the Wigner, and the Choi–Williams distributions are explained and illustrated with test cases. Examples of Choi—Williams analyses of machinery vibration signals are presented. The analyses detect discontinuities in the signals and their timing, amplitude and frequency modulation, and the presence of different components in a vibration signal.

Copyright © 1995 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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