Two-Bar Model for the Dynamics and Stability of Electrodynamic Tethers
| Autor: | Oscar L-igrave, s Pel-Uuml, Mario L. Cosmo, Enrico C. Lorenzini, Jes-ouml, pez-Rebollal, M. Ruiz |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2002 |
| Předmět: |
Engineering
Inclined orbit Computer simulation business.industry Bar (music) Applied Mathematics Aerospace Engineering system dynamics modelling Parameter space stability analysis electrodynamic tethers in space Instability Classical mechanics Space and Planetary Science Control and Systems Engineering Electrical and Electronic Engineering business Magnetic dipole Electrodynamic tether Rope |
| Popis: | Previously a new dynamic instability that affected electrodynamic tethers in inclined orbits was studied, with a simple one-bar model that neglected the contribution of the tether lateral dynamics. The e exibility of the tether (lateral dynamics ), however, plays an important role in the overall motion of the system as shown by numerical simulations of a bare-tether generator in a circular inclined orbit. The same analytical techniques of the previous work arenow applied to investigate the dynamics and stability of an electrodynamic tether system modeled by two articulatedbarsthat accountforthelowestlateralmodesof thetether. Theanalysis,whichcanbedirectly extended to any electrodynamic tether system, has been focused on two particular, but important cases: the combination of a conductiveand a nonconductive leadertether (as in the Propulsive Small Expendable Deployment System )and a homogeneous, conductive tether. The lateral dynamics is extremely rich, with skip rope motion, instability peaks, and chains ofbifurcationsfor differentregions ofthe parameter space. The sameenergy pumping mechanism that destabilizes the rigid model (one bar) is found to drive an even faster instability of the lateral modes. Damping, which has not been included in the analysis, could change this unstable behavior. |
| Databáze: | OpenAIRE |
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