Adaptive diagnosis of the bilinear mechanical systems

A generic adaptive approach is proposed for diagnosis of the bilinear mechanical systems. The approach adapts the free oscillation method for bilinearity diagnosis of mechanical systems. The expediency of the adaptation is proved for a recognition feature, the decrement of the free oscillations. The...

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Bibliographic Details
Published in:Mechanical systems and signal processing 2009-07, Vol.23 (5), p.1548-1553
Main Authors: Gelman, L., Gorpinich, S., Thompson, C.
Format: Article
Language:English
Subjects:
Adaptation
Bilinear mechanical systems
Decrement of free oscillations
Diagnosis
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Likelihood ratio
Measurement and testing methods
Physics
Resonance frequency
Solid mechanics
Structural and continuum mechanics
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Summary:A generic adaptive approach is proposed for diagnosis of the bilinear mechanical systems. The approach adapts the free oscillation method for bilinearity diagnosis of mechanical systems. The expediency of the adaptation is proved for a recognition feature, the decrement of the free oscillations. The developed adaptation consists of variation of the adaptive likelihood ratio of the decrement with variation of the resonance frequency of the bilinear system. It is shown that in the cases of the frequency-independent and the frequency-dependent internal damping, the adaptation is expedient. To investigate effectiveness of the adaptation in these cases, a numerical simulation was carried out. The simulation results show that use of the adaptation increases the total probability of the correct diagnosis of system bilinearity.
ISSN:0888-3270
1096-1216
DOI:10.1016/j.ymssp.2009.01.007