Dynamical modelling of the motorised momentum exchange tether incorporating axial elastic effects

Chen, Y. and Cartmell, M. (2007) Dynamical modelling of the motorised momentum exchange tether incorporating axial elastic effects. In: Advanced Problems in Mechanics: Russian Academy of Sciences, St. Petersburg, Russia, 20-28 June 2007,

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Abstract

A discretised planar tether model is proposed for the Motorised Momentum Exchange Tether (MMET) in which axial elasticity is accommodated. The model uses a generalised co-ordinate defining angular motion of the tether about its centre of mass, as it travels at constant velocity on a circular orbit in the Earth’s equatorial plane and a generalised coordinate depicting the elastic part of the tether length. The system comprises a symmetrical double payload configuration, with outrigger counter inertia, and it is shown that including axial elasticity permits an enhanced level of modelling accuracy for the tether both in librating and spinning modes. A simulation has been devised in MATLAB and SIMULINK for different data cases. This work will be used later within a spin-up control system and will act as a precursor for an in-depth study into the multi-scale dynamics of MMET tethers and space webs, on more complicated orbits. This, in turn, will be assimilated within new mission architectures.

Item Type:Conference Proceedings
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Cartmell, Prof Matthew and Chen, Mr Yi
Authors: Chen, Y., and Cartmell, M.
Subjects:T Technology > TJ Mechanical engineering and machinery
T Technology > TA Engineering (General). Civil engineering (General)
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Copyright Holders:Copyright © 2007 Russian Academy of Sciences
First Published:First published in Proceedings of the Advanced Problems in Mechanics: Russian Academy of Sciences, St. Petersburg, Russia, 20-28 June 2007
Publisher Policy:Reproduced with the permission of the publisher

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