22 May 2015 Pursuit-evasion games with information uncertainties for elusive orbital maneuver and space object tracking
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Abstract
This paper develops and evaluates a pursuit-evasion (PE) game approach for elusive orbital maneuver and space object tracking. Unlike the PE games in the literature, where the assumption is that either both players have perfect knowledge of the opponents’ positions or use primitive sensing models, the proposed PE approach solves the realistic space situation awareness (SSA) problem with imperfect information, where the evaders will exploit the pursuers’ sensing and tracking models to confuse their opponents by maneuvering their orbits to increase the uncertainties, which the pursuers perform orbital maneuvers to minimize. In the game setup, each game player P (pursuer) and E (evader) has its own motion equations with a small continuous low-thrust. The magnitude of the low thrust is fixed and the direction can be controlled by the associated game player. The entropic uncertainty is used to generate the cost functions of game players. The Nash or mixed Nash equilibrium is composed of the directional controls of low-thrusts. Numerical simulations are emulated to demonstrate the performance. Simplified perturbations models (SGP4/SDP4) are exploited to calculate the ground truth of the satellite states (position and speed).
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Dan Shen, Dan Shen, Bin Jia, Bin Jia, Genshe Chen, Genshe Chen, Erik Blasch, Erik Blasch, Khanh Pham, Khanh Pham, } "Pursuit-evasion games with information uncertainties for elusive orbital maneuver and space object tracking", Proc. SPIE 9469, Sensors and Systems for Space Applications VIII, 94690J (22 May 2015); doi: 10.1117/12.2181160; https://doi.org/10.1117/12.2181160
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