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Accession Number
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N20120014309
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Title
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Trajectory Control of Rendezvous with Maneuver Target Spacecraft.
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Publication Date
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Aug 2012
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Media Count
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10p
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Personal Author
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Z. Zhou
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Abstract
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In this paper, a nonlinear trajectory control algorithm of rendezvous with maneuvering target spacecraft is presented. The disturbance forces on the chaser and target spacecraft and the thrust forces on the chaser spacecraft are considered in the analysis. The control algorithm developed in this paper uses the relative distance and relative velocity between the target and chaser spacecraft as the inputs. A general formula of reference relative trajectory of the chaser spacecraft to the target spacecraft is developed and applied to four different proximity maneuvers, which are in-track circling, cross-track circling, in-track spiral rendezvous and cross-track spiral rendezvous. The closed-loop differential equations of the proximity relative motion with the control algorithm are derived. It is proven in the paper that the tracking errors between the commanded relative trajectory and the actual relative trajectory are bounded within a constant region determined by the control gains. The prediction of the tracking errors is obtained. Design examples are provided to show the implementation of the control algorithm. The simulation results show that the actual relative trajectory tracks the commanded relative trajectory tightly. The predicted tracking errors match those calculated in the simulation results. The control algorithm developed in this paper can also be applied to interception of maneuver target spacecraft and relative trajectory control of spacecraft formation flying.
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Keywords
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Error analysis
Feedback control
Formation flying
Spacecraft control
Spacecraft trajectories
Targets
Trajectories
Trajectory control
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Source Agency
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National Aeronautics and Space Administration
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NTIS Subject Category
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84G - Unmanned Spacecraft
84C - Manned Spacecraft
84D - Spacecraft Trajectories & Flight Mechanics
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Corporate Author
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National Aeronautics and Space Administration, Hampton, VA. Langley Research Center.
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Document Type
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Conference proceedings
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Title Note
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N/A
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NTIS Issue Number
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1307
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Contract Number
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N/A
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