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AN EXPERIMENTAL STUDY OF THE IMPULSE RESPONSE OF A VIBRO-IMPACTING CANTILEVER BEAM

โœ Scribed by D.J WAGG; G KARPODINIS; S.R BISHOP

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
351 KB
Volume
228
Category
Article
ISSN
0022-460X

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โœฆ Synopsis

The dynamics of a vibro-impacting cantilever beam experiment using an impact load cell is considered. The signal recorded from the cell produces spike train-type data. The issues related to the analysis of such data are discussed; particularly the sampling rate and threshold values. For vibro-impact motion of the beam, the duration of impacts is investigated by using a time of contact measure. The implications are discussed for vibro-impact systems mathematically modelled by using instantaneous impact assumptions (coe$cient of restitution). Using the load cell to measure impact forces for the beam system is also considered. Then a delay reconstruction of the dynamics of the system by using interspike intervals is considered. It is demonstrated how this process is e!ected by the in#uence of noise and the data-acquision process using numerical simulations of the experimental data. It is shown how simple periodic motions can be identi"ed by using a probability density approach and possible future research is highlighted.

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