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Module 2: Simulation Environments

Module Overview​

Master the three major simulation environments for robotics development: Gazebo Classic, Unity Robotics, and NVIDIA Isaac Sim. Learn to build virtual environments, spawn robots, simulate physics, and test algorithms before deploying to hardware.

Duration: Weeks 5-7 Prerequisites: Module 1 (ROS 2 foundations), basic 3D graphics concepts Learning Outcomes:

  • Configure Gazebo Classic for ROS 2 integration
  • Build Unity scenes with the Unity Robotics Hub
  • Leverage NVIDIA Isaac Sim for photorealistic simulation and Isaac Gym for RL
  • Compare simulation environments and choose the right tool for your application

Lessons​

Week 5: Gazebo Simulation Basics​

Learn Gazebo Classic/Sim architecture, URDF/SDF models, physics engines, sensor plugins, and ROS 2 integration.

Key Topics: World files, robot models, Gazebo plugins, spawn entities, sensor simulation

Week 6: Unity Robotics for Simulation​

Explore Unity's real-time 3D engine for robotics, integrating ROS 2 via Unity Robotics Hub, and building custom environments.

Key Topics: Unity Editor, ROS-TCP-Connector, URDF Importer, sensor visualization, ML-Agents integration

Week 7: NVIDIA Isaac Sim & Isaac Gym​

Dive into NVIDIA's Omniverse-based simulator for ray-traced rendering, physics simulation, and reinforcement learning.

Key Topics: Isaac Sim interface, synthetic data generation, Isaac Gym for RL, domain randomization

Module Resources​

  • Gazebo Classic 11: Stable release for ROS 2 Humble
  • Gazebo Sim (Ignition Fortress): Next-gen Gazebo with modern architecture
  • Unity 2022.3 LTS: Long-term support version with Unity Robotics Hub
  • NVIDIA Isaac Sim 2023.1: Latest Omniverse-based simulator
  • Hardware: GPU recommended (NVIDIA RTX for Isaac Sim ray tracing)

Assessment​

  • Weekly Quizzes: 7 questions each covering simulation concepts
  • Hands-On: Build a custom Gazebo world, Unity scene, and Isaac Sim environment
  • Capstone: Run the same robot controller across all three simulators and compare results

Next: Start with Week 5: Gazebo Simulation Basics →