Linear stability of electrodynamic tethers

Dobrowolny, M. (2002) Linear stability of electrodynamic tethers. Il nuovo cimento C, 25 (4). pp. 369-391. ISSN 1826-9885

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We investigate the dynamic stability of electrodynamic tethers of the type envisaged for future applications like deorbiting spacecraft and/or propulsion. In such tethers, electrodynamic forces couple the tether natural oscillations in the orbital plane with those out of the orbital plane. The investigation is done with reference to a model where the time variation of the tether current is assumed to be given. In addition, we address both the case of a bare tether and that of an insulated conducting tether collecting current through a terminating balloon. In the linear approximation, we find possible instabilities of the tether libration modes, at moderate current values, for both the case of a bare tether and that of an insulated conducting tether. Instabilities are also found for the lateral oscillations (string modes) and the case of a bare tether. The equations obtained allow a discussion of the instability mechanisms.

Item Type: Article
Uncontrolled Keywords: Physics of the ionosphere
Subjects: 500 Scienze naturali e Matematica > 550 Scienze della Terra > 551 Geologia, Idrologia, Meteorologia > 551.5 Meteorologia (Classificare qui l'atmosfera) (Classificare la previsione e le previsioni di specifici fenomeni meteorologici in 551.64; classificare la Micrometeorologia in 551.66) > 551.51 Composizione, zone, dinamica dell'atmosfera > 551.514 Alta atmosfera (Include la magnetosfera, la mesosfera) (Classificare i fenomeni magnetici nella magnetosfera, le opere d'insieme sulla magnetosfera in 538.766) > 551.5145 Ionosfera
Depositing User: Marina Spanti
Date Deposited: 12 Mar 2020 13:20
Last Modified: 12 Mar 2020 13:20

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