𝔖 Bobbio Scriptorium
✦   LIBER   ✦

THE DIRECTIONAL WIGNER DISTRIBUTION AND ITS APPLICATIONS

✍ Scribed by C.W. Lee; Y.-S. Han

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
312 KB
Volume
216
Category
Article
ISSN
0022-460X

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✦ Synopsis

A new signal processing technique, the directional Wigner distribution (dWD), is presented to characterize the instantaneous planar motion of a measurement point in a structure from its transient complex-valued vibration signal. It is proven that the auto-dWD essentially tracks the shape and directivity of the instantaneous planar motion, whereas the phase of the cross-dWD indicates its inclination angle. Finally, the technique is successfully applied to two practical cases: a rotor during run-up and an automobile engine during crank-on/idling/engine-off.

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