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Learning cooperative strategies in multi-agent encirclement games with faster prey using prior knowledge

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Abstract

Multi-agent encirclement with collision avoidance constitutes a common challenge in the multi-agent confrontation domain, wherein the focus lies in the development of cooperative strategies among agents. Previous studies encountered difficulties in addressing the dynamic encirclement of faster prey in obstacles environment. This paper introduces a novel multi-agent deep reinforcement learning approach based on prior knowledge. It is dedicated to exploring the multi-agent encirclement with collision avoidance task involving slower multiple pursuers collaboratively encircling faster prey in an obstacles environment. Firstly, the utilization of the classic Apollonius circle theory as prior knowledge guides agent action selection, narrows the exploratory action space, and accelerates the learning of strategies. Subsequently, the variance descriptor restricts the motion direction of pursuers, thus ensuring that pursuers continuously narrow the encirclement until the prey is successfully encircled. Finally, experiments in an obstacles environment were conducted to validate the proposed method. The results indicate that our method can acquire an effective encirclement strategy, with an encirclement success rate exceeding that of previous methods by more than 10%, and simulation experiment results demonstrate the effectiveness and practicability of our method.

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Data availibility

For data access requests, interested researchers are encouraged to contact the corresponding author at. In addition to data access, we provide detailed information about the experimental setup and configurations to aid in result replication: We conducted experiments using Python 3.8 on a Linux-based server with the following dependencies: open AI gym(0.10.5) TensorFlow 2.4, Numpy(1.14.5), python(3.7), https://github.com/openai/multiagent-particle-envs. We are committed to fostering collaboration and transparency in research, and we encourage fellow researchers to reach out for any inquiries regarding data access or the experimental setup.

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Correspondence to Dianxi Shi.

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Appendix A Number of agents

Appendix A Number of agents

Based on the mathematical principles of the Apollonius circle and the encirclement task defined in section 3.1, when the pursuers encircle the prey, the \(360^{\circ }\) range around the prey is covered by the pursuers’ capture angles, as shown in Fig. 11. Consequently, we can establish the relationship between the number of pursuers and prey within an encirclement task.

Fig. 11
figure 11

The number of agents

$$n_{{\min }} = \left[ {\frac{\pi }{{\arcsin \frac{{v_{p} }}{{v_{e} }}}}} \right]$$
(18)

It is evident that the correlation between the number of agents in the encirclement task is contingent upon the speed ratio between the pursuer and the prey.

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Li, T., Shi, D., Wang, Z. et al. Learning cooperative strategies in multi-agent encirclement games with faster prey using prior knowledge. Neural Comput & Applic 36, 15829–15842 (2024). https://doi.org/10.1007/s00521-024-09727-6

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