Relative motion modeling and control in a perturbed orbit

Okasha, Mohamed Elsayed Aly Abd Elaziz and Newman, Brett (2011) Relative motion modeling and control in a perturbed orbit. In: 21st AAS/AIAA Space Flight Mechanics Meeting, 13–17 February 2011, New Orleans, Louisiana.

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Abstract

In this paper, the dynamics of the relative motion problem in a perturbed orbital environment are exploited based on Gauss’ and Cowell’s variational equations. The inertial coordinate frame and relative coordinate frame (Hill frame) are studied to describe the relative motion. A linear high fidelity model is developed to describe the relative motion. This model takes into account primary gravitational and atmospheric drag perturbations. In addition, this model is used in the design of a control, guidance, and navigation system of a chaser vehicle to approach towards and to depart form a target vehicle in proximity operations. Relative navigation uses an extended Kalman filter based on this relative model to estimate the relative position and velocity of the chaser vehicle with respect to the target vehicle. This filter uses the range and angle measurements of the target relative to the chaser from a simulated LIDAR system. The corresponding measurement models, process noise matrix, and other filter parameters are provided. Numerical simulations are performed to assess the precision of this model with respect to the full nonlinear model. The analyses include the navigation errors and trajectory dispersions.

Item Type:	Conference or Workshop Item (Full Paper)
Additional Information:	6908/38708
Uncontrolled Keywords:	Atmospheric drag; Filter parameter; High fidelity models; Inertial coordinate frame; Lidar systems; Measurement model; Navigation error; Non-linear model; Orbital environments; Process noise; Proximity operations; Relative coordinates; Relative motion; Relative navigation; Relative positions; Target vehicles; Variational equations
Subjects:	T Technology > TL Motor vehicles. Aeronautics. Astronautics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Mechanical Engineering
Depositing User:	Dr Mohamed Okasha
Date Deposited:	23 Oct 2014 15:51
Last Modified:	23 Oct 2014 15:51
URI:	http://irep.iium.edu.my/id/eprint/38708

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