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Reports Outline Control Engineering Findings from University of Colorado (Orbit Radial Dynamic Analysis of Two-Craft Coulomb Formation at Libration...

July 1, 2014



Reports Outline Control Engineering Findings from University of Colorado (Orbit Radial Dynamic Analysis of Two-Craft Coulomb Formation at Libration Points)

By a News Reporter-Staff News Editor at Journal of Technology -- New research on Control Engineering is the subject of a report. According to news reporting originating in Boulder, Colorado, by VerticalNews journalists, research stated, "The linearized orbit radial dynamics and stability analysis of a two-craft virtual Coulomb structure at Earth moon libration points are investigated. The linearized study assumes that the sunlit areas of the two-craft structure are equal such that the differential solar radiation pressure on the formation is zero."

The news reporters obtained a quote from the research from the University of Colorado, "The relative distance between the two satellites of the Coulomb tether is controlled using electrostatic Coulomb forces. The separation distance between the satellites is stabilized with a charge feedback law that maintains the relative distance at a constant value. The electrostatic virtual tether between the two craft is capable of both tensile and compressive forces. The gravity gradient torques on the formation due to the two celestial objects is exploited to stabilize the Coulomb tether formation in the orbit radial direction. Controlling the separation distance stabilizes the in-plane rotation angle; however, the out-of-plane rotational motion is not affected by the spacecraft charge control law. The new two-craft dynamics at the libration points is provided as a general framework in which circular Earth orbit dynamics form a special case. Furthermore, an alternate linear control technique for a two-craft Coulomb virtual tether formation's radial equilibrium at a collinear libration point is developed and analyzed."

According to the news reporters, the research concluded: "Numerical simulations using charge feedback law are presented at both a collinear and a triangular libration point."

For more information on this research see: Orbit Radial Dynamic Analysis of Two-Craft Coulomb Formation at Libration Points. Journal of Guidance Control and Dynamics, 2014;37(2):682-691. Journal of Guidance Control and Dynamics can be contacted at: Amer Inst Aeronautics Astronautics, 1801 Alexander Bell Drive, Ste 500, Reston, VA 22091-4344, USA.

Our news correspondents report that additional information may be obtained by contacting R. Inampudi, University of Colorado, Dept. of Aerosp Engn Sci, Boulder, CO 80309, United States.

Keywords for this news article include: Boulder, Colorado, United States, Control Engineering, North and Central America

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Source: Journal of Technology


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