Two Hierarchical Guidance Laws of Pursuer in Orbital Pursuit–Evasion–Defense Game

In this study, differential game theory was applied to propose two guidance laws of a pursuer in an orbit pursuit–evasion–defense game. One conservative law maneuvering absolute safety before pursuing the evader, and other radical playing with defender only when necessary. Both enable avoid while but reduces pursuit time by moving closer defender. The pursuer, defender, evader are all spacecraft carrying three-axis thrusters that can provide independent thrust three directions. proximity dynamics processes participants were described Clohessy–Wiltshire equations. A method for solving time-to-go analytically proposed simplifying model meet real-time requirements. effectiveness verified numerical simulations, differences between analyzed.