Nonintrusive Measurement of Contact Forces During Vibration Dominated Impacts

Satwinder Jit Singh; Anindya Chatterjee

doi:10.1115/1.1789535

Journal of Dynamic Systems, Measurement, and Control | Volume 126 | Issue 3 | TECHNICAL PAPERS

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TECHNICAL PAPERS

Nonintrusive Measurement of Contact Forces During Vibration Dominated Impacts

Satwinder Jit Singh and Anindya Chatterjee

[+] 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

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Experimental setup

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Preliminary measurements

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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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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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(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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Singh S, Chatterjee A. Nonintrusive Measurement of Contact Forces During Vibration Dominated Impacts. ASME. J. Dyn. Sys., Meas., Control. 2004;126(3):489-497. doi:10.1115/1.1789535.

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Nonintrusive Measurement of Contact Forces During Vibration Dominated Impacts

References

Figures

Experimental setup

Preliminary measurements

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.)

(a) Global Tikhonov, (b) piecewise Tikhonov, and (c) piecewise Fourier, with 16, 4, and 14 harmonics used for the three microimpacts, respectively

Left: FFT (magnitude) of the strain gauge output. Right: Decay of strain gauge output. Slope of the tangent γ=−0.0533 rad.

Results of force estimation using Eq. (9)

Results of force estimation from Eq. (11)

(a) Global Tikhonov, (b) piecewise Tikhonov, and (c) piecewise Fourier, with 17, 2, and 15 harmonics used for the three micro-impacts, respectively

Tables

Errata

Discussions

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