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TIME DOMAIN ESTIMATION OF RESPONSE AND INTENSITY IN BEAMS USING WAVE DECOMPOSITION AND RECONSTRUCTION

โœ Scribed by B.R. MACE; C.R. HALKYARD

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
335 KB
Volume
230
Category
Article
ISSN
0022-460X

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โœฆ Synopsis

A method is described by which instantaneous values of the response, the internal forces and the intensity in beams can be estimated as functions of time. The individual components of intensity which propagate in each direction and the components due to shear and moment can also be estimated. The estimates are provided in real time by digitally "ltering the outputs of an array of sensors. The digital "lters are designed in the frequency domain using a wave decomposition approach and reconstructed in the time domain as FIR "lters in this paper. The design and implementation process is described, numerical simulations of measurements in the far"eld performed and an experimental implementation presented. The method is relatively insensitive to sensor miscalibration and measurement noise compared to other approaches, and yields instantaneous estimates as well as time averages.

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