Abstract
This paper studies the effect of shaker impedance and the way this parameter can affect the frequency response measurement (FRF) on structures. Three different shaker designs were used for this study to better understand the effect of the shaker impedance on the force transmissibility characteristic function. Analytical MKC models are used to derive equations and then the experiments were conducted to validate the model. Another effect that is studied here briefly is the cross-sensitivity of the sensors when subjected to lateral forces (or displacements) and bending. It is shown that this effect will lead to non-repeatable measurements, especially in the case of impedance heads.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Rao DK (1987) Electrodynamic interaction between a resonating structure and an exciter. In: Proceedings of the 5th international modal analysis conference – IMAC, pp1142–1150
Varato PS, de Oliviera LPR (2002) Interaction between a vibration exciter and the structure under test. Sound Vib 36(10):20–26
McConnell KG, Varato PS (2008) Vibration and testing theory and practice, 2nd edn. John Wiley and Sons, USA
McConnell KG, Han SB (1991) A theoretical basis for cross-axis corrections in tri-axial accelerometers. In: Proceedings of the 9th international modal analysis conference – IMAC, pp 171–175
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2012 The Society for Experimental Mechanics, Inc. 2012
About this paper
Cite this paper
Dargah, M.H.P., Allemang, R.J., Phillips, A.W. (2012). Exciter Impedance and Cross-Axis Sensor Sensitivity Issues in FRF Estimation. In: Allemang, R., De Clerck, J., Niezrecki, C., Blough, J. (eds) Topics in Modal Analysis I, Volume 5. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-2425-3_50
Download citation
DOI: https://doi.org/10.1007/978-1-4614-2425-3_50
Published:
Publisher Name: Springer, New York, NY
Print ISBN: 978-1-4614-2424-6
Online ISBN: 978-1-4614-2425-3
eBook Packages: EngineeringEngineering (R0)