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Finite element based N-Port model for preliminary design of multibody systems

Sanfedino, Francesco and Alazard, Daniel and Pommier-Budinger, Valérie and Falcoz, Alexandre and Boquet, Fabrice Finite element based N-Port model for preliminary design of multibody systems. (2018) Journal of Sound and Vibration, 415. 128-146. ISSN 0022-460X

(Document in English)

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Official URL: https://doi.org/10.1016/j.jsv.2017.11.021


This article presents and validates a general framework to build a linear dynamic Finite Element-based model of large exible structures for integrated Control/Structure design. An extension of the Two-Input Two-Output Port (TITOP) approach is here developed. The authors had already proposed such framework for simple beam-like structures: each beam was considered as a TITOP sub-system that could be interconnected to another beam thanks to the ports. The present work studies bodies with multiple attaching points by allowing complex interconnections among several sub-structures in tree-like assembly. The TITOP approach is extended to generate NINOP (N-Input N-Output Port) models. A Matlab toolbox is developed integrating beam and bending plate elements. In particular a NINOP formulation of bending plates is proposed to solve analytic twodimensional problems. The computation of NINOP models using the outputs of a MSC/Nastran modal analysis is also investigated in order to directly use the results provided by a commercial finite element software. The main advantage of this tool is to provide a model of a multibody system under the form of a block diagram with a minimal number of states. This model is easy to operate for preliminary design and control. An illustrative example highlights the potential of the proposed approach: the synthesis of the dynamical model of a spacecraft with two deployable and exible solar arrays.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The original PDF of the article can be found at http://www.sciencedirect.com/science/article/pii/S0022460X17307915
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Airbus (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Other partners > ESA - ESTEC (NETHERLANDS)
Laboratory name:
Deposited On:19 Dec 2017 09:22

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