A Switching-Target Strategy for Multiple-Spacecraft Terminal Interception

This paper proposes a control strategy focused on the terminal interception of a multiple-pursuer/multiple-evader spacecraft pursuit–evasion game. The strategy dynamically switches the capture target for pursuers based on the real-time state of the spacecraft. Firstly, the analytic hierarchy process is used to quantify the state of the pursuers and evaders as a weight matrix. This allows for the allocation of spacecraft to be transformed into the optimal matching of the weighted bipartite graph. Subsequently, the Kuhn–Munkres algorithm is used to search for the optimal matching. Then, the linear quadratic differential game model is used to solve the optimal control strategy of multiple-on-one problems. Finally, the effects of switching control strategies are given by numerical simulations. The results indicate that cooperative guidance leads to better performance of interception, and switching targets helps shorten the terminal distance and increase the success rate.