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TECHNICAL PAPERS

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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References

Figures

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Preliminary measurements
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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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Results of force estimation using Eq. (9)
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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.)
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(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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(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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