Chaos-based reinforcement learning with TD3
This is an incremental improvement for reinforcement learning researchers, addressing a specific bottleneck in CBRL by incorporating a modern algorithm.
The study tackled the problem of underdeveloped learning algorithms in chaos-based reinforcement learning (CBRL) by integrating the TD3 algorithm, showing that CBRL agents with TD3 can autonomously adjust exploration and exploitation, with a suitable chaos strength range identified for flexibility.
Chaos-based reinforcement learning (CBRL) is a method in which the agent's internal chaotic dynamics drives exploration. However, the learning algorithms in CBRL have not been thoroughly developed in previous studies, nor have they incorporated recent advances in reinforcement learning. This study introduced Twin Delayed Deep Deterministic Policy Gradients (TD3), which is one of the state-of-the-art deep reinforcement learning algorithms that can treat deterministic and continuous action spaces, to CBRL. The validation results provide several insights. First, TD3 works as a learning algorithm for CBRL in a simple goal-reaching task. Second, CBRL agents with TD3 can autonomously suppress their exploratory behavior as learning progresses and resume exploration when the environment changes. Finally, examining the effect of the agent's chaoticity on learning shows that there exists a suitable range of chaos strength in the agent's model to flexibly switch between exploration and exploitation and adapt to environmental changes.