Proximal Policy Optimization
Proximal Policy Optimization (PPO) is a reinforcement learning algorithm used to train agents to make optimal decisions in complex environments, with a current research focus on improving its efficiency and robustness. Recent work explores enhancements such as refined credit assignment methods (e.g., VinePPO), incorporation of human feedback and safety mechanisms (e.g., HI-PPO, PRPO), and addressing challenges in high-dimensional spaces and sample efficiency through techniques like diffusion model integration. These advancements are significant for various applications, including robotics, autonomous systems, and large language model alignment, where PPO's ability to learn effective policies from interactions with the environment is crucial.
Papers
Reinforcement learning for safety-critical control of an automated vehicle
Florian Thaler, Franz Rammerstorfer, Jon Ander Gomez, Raul Garcia Crespo, Leticia Pasqual, Markus Postl
Curriculum Proximal Policy Optimization with Stage-Decaying Clipping for Self-Driving at Unsignalized Intersections
Zengqi Peng, Xiao Zhou, Yubin Wang, Lei Zheng, Ming Liu, Jun Ma