Centrala begrepp
Consistency models offer efficient and expressive policy representation for reinforcement learning, outperforming diffusion models in online RL settings.
Sammanfattning
The content discusses the use of consistency models as a policy representation in reinforcement learning. It compares the efficiency and performance of consistency models with diffusion models in various RL settings. The study includes offline, offline-to-online, and online RL scenarios, showcasing the benefits of using consistency models for faster inference and improved performance.
Abstract:
- Score-based generative models like diffusion model effective but slow in RL.
- Consistency model proposed as an efficient policy representation.
- Demonstrates superior speed and performance compared to diffusion model in online RL.
Introduction:
- Parameterized policy representation crucial for deep RL.
- Various methods exist for discrete and continuous action spaces.
- Generative models like GMM, VAE, DDPM used for multi-modal data distribution.
Consistency Model:
- Solves multi-modal distribution matching problem with ODE.
- Shrinks sampling steps compared to diffusion model.
- Offers fast sampling process without compromising generation performance.
Consistency Model as RL Policy:
- Maps consistency model to MDP policy.
- Consistency Action Inference iteratively predicts denoised samples.
- Consistency Behavior Cloning trains conditional consistency model with loss scaling.
Experimental Evaluation:
- Evaluates expressiveness and efficiency on D4RL dataset tasks.
- Compares Consistency-BC and Diffusion-BC performances in offline RL settings.
- Shows significant improvement in computational efficiency with Consistency policies.
Citat
"Consistency models offer efficient and expressive policy representation for reinforcement learning."
"Fast sampling process of the consistency policy improves training time significantly."