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Multi-frequency dynamic absorber for improved spacecraft comfort during the launch phase

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Abstract

In this paper, a methodology to design a multi-frequency dynamic absorber for spacecrafts during the launch phase is presented. A dynamic absorber is a mechanical device which is able to reduce the magnitude of vibration imposed upon a primary structure. The modelling of dynamic coupling between the absorber and satellite is carried out via finite-element (FE) analysis of the coupled structure. The satellite response has been calculated to identify the contribution of the dynamic absorber and to quantify how such a device can improve the overall mechanical environment for the spacecraft during launch. Indeed, an analytical model is used to find relations and conditions to tune the multi-frequency absorber on satellite dynamics in order to improve the payload comfort within a specific frequency band. The feasibility and effectiveness of installing a dynamic absorber has been also illustrated by simulating the behaviour of the coupled absorber–satellite system via FE analysis for an actual case of a satellite vibration control. The results have confirmed the expectations of theoretical approach and modelling and have assessed the capability of the proposed design methodology.

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Authors and Affiliations

  1. Department of Mechanical and Aerospace Engineering, University of Rome “La Sapienza”, via Eudossiana, 18, 00184, Rome, Italy

    Franco Mastroddi, Gianluca Facchini & Paolo Gaudenzi

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  1. Franco Mastroddi
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  2. Gianluca Facchini
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  3. Paolo Gaudenzi
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Correspondence to Franco Mastroddi.

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Mastroddi, F., Facchini, G. & Gaudenzi, P. Multi-frequency dynamic absorber for improved spacecraft comfort during the launch phase. CEAS Space J 3, 77–88 (2012). https://doi.org/10.1007/s12567-012-0026-1

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  • DOI: https://doi.org/10.1007/s12567-012-0026-1

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