Journal
JOURNAL OF SOUND AND VIBRATION
Volume 239, Issue 2, Pages 233-254Publisher
ACADEMIC PRESS LTD
DOI: 10.1006/jsvi.2000.3118
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Existing techniques to identify moving forces exhibit the common weakness of having large fluctuations in the identified results. A new method of moving force identification is developed in this paper making use of the dynamic programming technique to overcome this weakness. The forces in the state-space Formulation of the dynamic system are identified in the time domain using a recursive formula based on several distributed sensor measurements, and responses of the structure are reconstructed using the identified forces for comparison. Like all inverse problems, the computation is ill-conditioned. However, the: dynamic programming technique inherently provides bounds to the ill-conditioned forces, and results from the simulation studies and laboratory work show great improvements over existing methods in the accuracy of identification. (C) 2001 Academic Press.
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