Real-Time ChatGPT Hybrid Decision-Making for Safe Human-Robot Interaction

Overview

This project explores the integration of Large Language Models (LLMs), specifically ChatGPT, into robotic decision-making frameworks to enhance real-time human-robot collaboration. By leveraging a hybrid decision-making model, this system balances reactive control with deliberative planning, ensuring adaptive, efficient, and safe robotic behavior.

Features

✅ Hybrid Decision-Making – Combines reactive and deliberative control strategies for improved real-time decision-making.
✅ LLM-Based Task Planning – Uses ChatGPT to process high-level natural language commands and convert them into actionable robot instructions.
✅ MoveIt Integration – Implements a hybrid planner in ROS2 MoveIt for dynamic path planning and obstacle avoidance.
✅ Human Detection and Interaction – Utilizes a 3D depth camera and YOLO for real-time human pose estimation and collision avoidance.
✅ Safe Human-Robot Collaboration – Implements layered safety measures to prevent collisions and enhance operational efficiency.

System Architecture

The robotic system is structured into several key components:

• UR5e Robotic Arm – Primary manipulator executing planned trajectories.
• ChatGPT Task Planner – Processes human commands and generates structured task plans.
• MoveIt Hybrid Planning Framework – Provides real-time reactive path planning and obstacle avoidance.
• PrimeSense 3D Depth Camera – Enables human pose estimation and dynamic collision marker generation.
• YOLO ROS Wrapper – Detects humans and objects to generate collision boundaries for safer interactions.

Results

Simulation Performance

• MoveIt hybrid planner successfully adapted to dynamic environments, ensuring real-time path corrections.
• Human pose detection provided accurate real-time collision avoidance, though response times needed further optimization.

Real-World Testing

• The global planner effectively executed pre-defined tasks with high accuracy.
• Real-time hybrid planning was validated in simulations but awaits further testing in physical environments.

Future Work

🚀 Improve real-time responsiveness with optimized service calls.
🚀 Enhance human detection accuracy using LiDAR or multi-camera setups.
🚀 Scale the system for complex environments, such as factory floors or clinical settings.
🚀 Explore alternative LLMs for improved command interpretation.

Contributors

👤 Nicholas Bell – Lead Developer & Researcher
📩 Contact: https://www.linkedin.com/in/nickojbell/

License

This project is licensed under the MIT License. See the LICENSE file for details.

References

📜 For a detailed breakdown, refer to the full Thesis Document.

Submodules

This project utilizes external repositories to extend its functionality. A big thank you to the contributors of these projects for their efforts in making robotics more accessible and powerful!

• OpenNI2 Submodule

  📌 Path: src/OpenNI2
  🔗 Repository: structureio/OpenNI2

• OpenNI2 Camera Submodule

  📌 Path: src/openni2_camera
  🔗 Repository: ros-drivers/openni2_camera