Abstract
Many nonlinear system identification methods have been introduced in the technical literature during the last 30 years. However, few of these methods were applied to real-life structures. In this context, the objective of the present paper is to demonstrate that the Restoring Force Surface (RFS) method can provide a reliable identification of a nonlinear spacecraft structure. The nonlinear component comprises an inertia wheel mounted on a support, the motion of which is constrained by eight elastomer plots and mechanical stops. Several adaptations to the RFS method are proposed, which include the elimination of kinematic constraints and the regularization of ill-conditioned inverse problems. The proposed methodology is demonstrated using numerical data.
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Acknowledgements
This paper has been prepared in the framework of the ESA Technology Research Programme study “Advancement of Mechanical Verification Methods for Non-linear Spacecraft Structures (NOLISS)” (ESA contractNo.21359/08/NL/SFe).
The author J.P. Noël would like to acknowledge the Belgian National Fund for Scientific Research (FRIA fellowship) for its financial support.
The authors finally thank Astrium SAS for sharing information about the SmallSat spacecraft.
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© 2012 The Society for Experimental Mechanics, Inc. 2012
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Noel, J.P., Kerschen, G., Newerla, A. (2012). Application of the Restoring Force Surface Method to a Real-life Spacecraft Structure. In: Adams, D., Kerschen, G., Carrella, A. (eds) Topics in Nonlinear Dynamics, Volume 3. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-2416-1_1
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DOI: https://doi.org/10.1007/978-1-4614-2416-1_1
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