Journal ArticleDOI
Drag and propulsive forces in electric sails with negative polarity
TLDR
In this article, a negative-bias E-sail with a sheath that must be correctly modeled for a flowing plasma ambient is presented, and the ion scattering within the sheath and the resulting force are determined for several plasma conditions.About:
This article is published in Advances in Space Research.The article was published on 2016-02-15. It has received 8 citations till now. The article focuses on the topics: Drag & Solar sail.read more
Citations
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Journal ArticleDOI
Flight Dynamics and Control Strategy of Electric Solar Wind Sails
TL;DR: In this paper, the authors studied the flight dynamics and control strategy for electric solar wind sails based on the nodal position finite element method, where the coupling effects between tether dynamics and t...
Journal ArticleDOI
Linearized relative motion and proximity control of E-sail-based displaced orbits
TL;DR: In this article, the linearized relative motion and control of E-sails operating in formation flight around a heliocentric displaced orbit is discussed, and two control strategies are proposed for stabilization, one is an active control aiming to change the topology of the relative motion to eliminate the instability caused by positive real eigenvalues, and the other is a closed-loop feedback control to maintain stability in the along track direction.
Journal ArticleDOI
Formation Flying for Electric Sails in Displaced Orbits. Part II: Distributed Coordinated Control
TL;DR: A distributed coordinated control law is designed in such a way that each deputy not only tracks the chief state, but also makes full use of information from its neighbors, thus increasing the redundancy and robustness of the formation system in case of failure among the communication links.
Journal ArticleDOI
Formation flying for electric sails in displaced orbits. Part I: Geometrical analysis
TL;DR: In this paper, a geometrical methodology for analyzing the formation flying of electric solar wind sail-based spacecraft that operate in heliocentric, elliptic, displaced orbits is presented, whose value is estimated using a thrust model that takes into account a variation of the propulsive performance with the sail attitude.
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Nonlinear dynamics of displaced non-Keplerian orbits with low-thrust propulsion
TL;DR: The stability, transition and control of displaced non-Keplerian orbits by the spacecraft using low-thrust propulsion is discussed, and operating the thrust pitch angle is an effective tool to achieve the transfer within different types of KAM tori, or even transfer beyond the KAMtori.
References
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Journal ArticleDOI
Tracing the Electron Density from the Corona to 1 au
TL;DR: In this paper, the electron density distribution in the ecliptic plane, from the corona to 1 AU, was derived using observations from 13.8 MHz to a few kHz by the radio experiment WAVES aboard the spacecraft Wind.
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Bare wire anodes for electrodynamic tethers
TL;DR: In this article, a simple electron-collection concept which is free of most of the physical uncertainties associated with plasma contactors in the rarefied, magnetized environment of an orbiting tether is discussed.
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Simulation study of solar wind push on a charged wire: basis of solar wind electric sail propulsion
TL;DR: In this paper, the authors used 1-D and 2-D electrostatic plasma simulations to calculate the force and present a semitheoretical formula which captures the simulation results, showing that under average solar wind conditions at 1 AU the force per unit length is (5±1×10−8 N/m for 15 kV potential and that the electron current is accurately given by the well-known orbital motion limited (OML) theory cylindrical Langmuir probe formula.
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The orbital-motion-limited regime of cylindrical Langmuir probes
TL;DR: In this paper, an asymptotic analysis of electron collection at high bias Φp serves to determine the domain of validity of the orbital motion limited (OML) regime of cylindrical Langmuir probes, which is basic for the workings of conductive bare tethers.