Automated Proximity
Operations Using Image Based Relative Navigation
Author(s)
Walker, Luke
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Abstract
This paper will describe a system for relative navigation and automated proximity operations for a small
spacecraft about another spacecraft using continuous thrust propulsion and low cost imagers. Novel
image processing algorithms provide range estimates in addition to traditional spherical angle estimates
using knowledge of the target spacecraft’s geometry. A differential correction batch filter is used to
provide relative navigation and state estimation. These state estimates are used to provide input for the
automated control of the chaser spacecraft via a Linear Quadratic Regulator. Propulsive maneuvers are
accomplished using several low-thrust, non-throttleable thrusters using pulse-width modulation and
thrust vectoring. A waypoint logic controller is used to define intermediate goals to reach the final goal
in order to limit operational risk from an error in estimation of the spacecraft’s relative state. The
system is described and then initial simulation test results are shown.
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Date
2012-05-01
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Text
Resource Subtype
Masters Project
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