Nonintrusive Measurement of Contact Forces During Vibration Dominated Impacts

[+] Author and Article Information
Satwinder Jit Singh, Anindya Chatterjee

Mechanical Engineering, Indian Institute of Science, Bangalore 560012, India

J. Dyn. Sys., Meas., Control 126(3), 489-497 (Dec 03, 2004) (9 pages) doi:10.1115/1.1789535 History: Received October 06, 2002; Revised March 19, 2003; Online December 03, 2004
Copyright © 2004 by ASME
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Grahic Jump Location
(a) Global Tikhonov, (b) piecewise Tikhonov, and (c) piecewise Fourier, with 17, 2, and 15 harmonics used for the three micro-impacts, respectively
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Results of force estimation using Eq. (9)
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Left: FFT (magnitude) of the strain gauge output. Right: Decay of strain gauge output. Slope of the tangent γ=−0.0533 rad.
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Preliminary measurements
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Results of force estimation from Eq. (11)
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Variation in condition number of observability matrix with strain gauge location. (The figure is symmetric because there are in fact two symmetrically placed strain gauges.)
Grahic Jump Location
(a) Global Tikhonov, (b) piecewise Tikhonov, and (c) piecewise Fourier, with 16, 4, and 14 harmonics used for the three microimpacts, respectively



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