Multiphysics elastodynamic finite element analysis of space debris deorbit stability and efficiency by electrodynamic tethers

Li, Gangqiang; Zhu, Zheng H.; Ruel, Stephane; Meguid, S. A.

doi:10.1016/j.actaastro.2017.04.025

Cited by 27 publications

(11 citation statements)

References 26 publications

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“…where F ext is the superposition of all the external forces as listed in (1). As presented in [11,22], the deorbiting process of a defunct satellite by using bare EDT equipment is a long-term process. Consequently, a desirable numerical integration algorithm for the deorbit process should have long-time stability and preserve the global geometric structure in the phase space.…”

Section: Multiphysics Formulation Of Flexible Electrodynamic Tether Smentioning

confidence: 99%

“…Therefore, the understanding and evaluation of the induced current of the EDT system with high accuracy is an important issue. However, in reality, the conductive tether experiences a bending deformation in the deorbit process owing to perturbative forces [11,12]. Therefore, a high accuracy calculation method with consideration of the realistic tether geometry is necessary.…”

Section: Introductionmentioning

confidence: 99%

“…This method has been successfully incorporated into the flexible tether model to predict the dynamic response of the EDT system in the deorbit process [17]. Furthermore, the ad-hoc method is unable to differentiate different bending profiles of tether with the same end nodes, for example, the difference between the semicircle and the S-shape profiles with the same end nodes [11,12]. It indicates that the variation of electron collection efficiency along the tether cannot be considered.…”

Section: Introductionmentioning

confidence: 99%

“…It indicates that the variation of electron collection efficiency along the tether cannot be considered. Accordingly, a finite element method is introduced to consider the coupling effect between the tether deflection and electrodynamic force [11,12]. The results show that this method is effective to capture the coupling effect between the tether deflection and the electrodynamic force.…”

Section: Introductionmentioning

confidence: 99%

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Parameter influence on electron collection efficiency of a bare electrodynamic tether

Zhu

2017

Sci. China Inf. Sci.

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This study develops a coupled multiphysics finite element method for the dynamic analysis of a bare flexible electrodynamic tether. Contrary to the existing methods, the new method discretizes and solves the orbital motion limited equation and the dynamic equation of an elastic flexible tether simultaneously. First, the new method is verified via comparison with the existing methods in a straight tether situation. Second, the number of tether elements, tether bending deformation, and two design parameters at the cathodic end affecting the electrical current are investigated. It is determined that the tether bending deformation and the two parameters i.e., the impedance Z T and Φ PW have a significant impact on the electron collection efficiency of an electrodynamic tether system. The results indicate that the proposed method should be applied in the refined mission analysis.

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Section: Multiphysics Formulation Of Flexible Electrodynamic Tether Smentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Parameter influence on electron collection efficiency of a bare electrodynamic tether

Zhu

2017

Sci. China Inf. Sci.

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“…2, Z T and λ cc are the interposed load and the dimensionless potential bias, respectively, at the cathode C [28,29]. However, there is computational difficulty in solving Eq.…”

Section: Tethered System Modelingmentioning

confidence: 99%

Libration control of bare electrodynamic tether for three-dimensional deployment

2018

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Various promising applications of electrodynamic tether have been proposed for space missions over the past decades. A crucial issue of these missions is to deploy an electrodynamic tether under a rapid and stable state. This paper aims to stabilize the libration motions of a bare electrodynamic tether during its three-dimensional deployment. The tethered system under consideration consists of a main-satellite and a sub-satellite connected to each other through a bare electrodynamic tether. A widely used dumbbell assumption considering the tether as rigid and inflexible is adopted to facilitate the dynamic modeling and analysis of the tethered system. A pair of active control laws is synthesized by simultaneously regulating the electric current and tether tension to achieve an efficient stabilization of the three-dimensional libration of the bare electrodynamic tether in the deployment process.

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Dynamic analysis of a tethered satellite system for space debris capture

Lim

Chung

2018

Nonlinear Dyn

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Multiphysics elastodynamic finite element analysis of space debris deorbit stability and efficiency by electrodynamic tethers

Cited by 27 publications

References 26 publications

Parameter influence on electron collection efficiency of a bare electrodynamic tether

Parameter influence on electron collection efficiency of a bare electrodynamic tether

Libration control of bare electrodynamic tether for three-dimensional deployment

Dynamic analysis of a tethered satellite system for space debris capture

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