Deep Reasoning and Robot Manipulation: Application of TRM Recursive Model in Action Strategy Generation

This project explores the integration of deep reasoning capabilities into robot action strategy generation. It implements the reasoning-capable strategy model ACTRM using Tiny Recursive Models (TRM), compares it with the baseline model ACT, and validates its effectiveness in the robosuite simulation environment. The goal is to enable robots to "think" before executing actions, enhancing decision-making abilities in complex scenarios.

Traditional robot learning systems mostly use end-to-end direct mapping of "perception-action", which underperforms in complex scenarios such as multi-step planning and causal understanding. The deep reasoning capabilities of large language models have opened up new directions for robot learning. Based on this idea, this project attempts to apply the TRM recursive reasoning mechanism to robot manipulation tasks.

Tiny Recursive Models Architecture

TRM is a compact recursive neural network architecture. It processes information at different abstract levels by recursively calling the same set of parameters, enabling a process similar to human "step-by-step thinking", making it suitable for resource-constrained environments and integration with robot strategies.

Dual Model Design

• ACT Baseline Model: Uses a standard Transformer architecture for action chunk prediction, serving as an efficient baseline in robot imitation learning.
• ACTRM Innovative Model: Introduces the TRM recursive reasoning module on top of ACT. Before generating actions, it performs multi-step reasoning on task goals, environmental states, etc., then uses the results as conditional inputs to the action generation module to improve generalization.

Experimental Environment

Based on the robosuite simulation platform, supporting the robomimic dataset. Tasks include Stack Color (color recognition + block stacking) and other standard tasks. Custom environments can be extended via the robothink repository.

Training and Evaluation Workflow

• Training: uv run python src/nn/train.py experiment=act_stack_color (supports switching between ACT/ACTRM and tasks)
• Evaluation: uv run python scripts/evaluate_rollout.py act_stack_color (records metrics such as success rate and execution efficiency)

Technical Details

Modular design, Hydra configuration-driven, type-safe code, and fixed random seeds ensure reproducibility.

Research Significance

• Improved Interpretability: Explicit reasoning steps make it easier to understand decision-making basis, suitable for safety-critical applications.
• Enhanced Generalization: The reasoning module helps extract abstract task representations, enabling better handling of new scenarios.
• Improved Sample Efficiency: Structured inductive bias reduces the amount of training data needed.

Challenges

Recursive reasoning increases computational overhead; there is a need to balance reasoning depth and response speed. How to design effective training objectives to supervise the reasoning process still needs exploration.

Conclusion

This project provides a new direction in the field of robot learning. By combining TRM with strategy models, it enables robots to learn to "think". The code structure is clear and the documentation is complete, making it suitable for researchers and developers to reproduce and extend.