Spacecraft Role Selection Method Based on Game Trees with Weights

The uncertain space environment requires spacecraft to have multiple roles and be able to switch between them adaptively. To address the spacecraft role switching problem in space games, this paper proposes a spacecraft role selection method based on a game tree with weights. Firstly, a spacecraft role selection model is established for the spacecraft role switching process, including a space posture threat level model and a spacecraft role switching cost model. Then, the game tree with weights is constructed by considering the space posture threat level and spacecraft role switching cost. Next, the spacecraft role selection method is designed based on the minimax method. Finally, the optimal search depth of the role selection method is analyzed and the effectiveness of the method is verified through game experiments with non-cooperative targets using random and greedy strategies.