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Chapter 10: Navigation and Path Planning in Isaac Sim

Template

Fill in content from specs/001-physical-ai-book-specs/spec.md lines 934-1011. Use Chapter 5 (05-simulation-foundations.mdx) as formatting reference.

Overview​

TODO: Add overview paragraph introducing navigation and path planning (spec.md lines 936-938)

Target Audience: Developers implementing autonomous navigation for humanoid robots.

Learning Objectives​

By the end of this chapter, you will be able to:

  1. TODO: Add learning objective 1 from spec.md line 942
  2. TODO: Add learning objective 2 from spec.md line 943
  3. TODO: Add learning objective 3 from spec.md line 944
  4. TODO: Add learning objective 4 from spec.md line 945
  5. TODO: Add learning objective 5 from spec.md line 946

TODO: Explain navigation fundamentals (spec.md line 942)

  • Costmaps
  • Global planning
  • Local planning
  • Obstacle avoidance

ROS 2 Nav2 Stack Overview​

TODO: Explain Nav2 components (spec.md lines 950, 954)

  • Global planner
  • Local planner
  • Costmap
  • Recovery behaviors
  • Behavior trees
  • Lifecycle nodes

Mermaid Diagram TODO: Create Nav2 Architecture diagram (spec.md line 985)

TODO: Sensor Data → Costmap → Global Planner → Local Planner → Velocity Commands → Robot

Costmaps: Static and Dynamic​

TODO: Explain costmap layers (spec.md line 951)

  • Static costmap (from map)
  • Dynamic costmap (from sensors)
  • Inflation layers

Mermaid Diagram TODO: Create Costmap Layers diagram (spec.md line 986)

TODO: Static Map + Obstacle Layer + Inflation Layer = Final Costmap

Global Path Planning Algorithms​

TODO: Explain global planning (spec.md lines 944, 952)

  • A* algorithm
  • Dijkstra
  • RRT (Rapidly-exploring Random Tree)

Mermaid Diagram TODO: Create Path Planning Visualization (spec.md line 987)

TODO: Show A* or Dijkstra path on grid map with obstacles

Local Planning and Obstacle Avoidance​

TODO: Explain local planning (spec.md line 953)

  • DWA (Dynamic Window Approach)
  • TEB (Timed Elastic Band)
  • Real-time trajectory generation

Configuring Nav2 for Humanoid Robots​

TODO: Add Nav2 configuration section (spec.md lines 943, 959)

TODO: Add installation and launch commands (spec.md lines 964-981)

# TODO: Add commands from spec.md lines 967-980
# - Install Nav2
# - Launch Nav2 with custom parameters
# - Send navigation goal
# - Visualize costmaps in RViz
# - Check Nav2 status

Integrating Isaac Sim Sensors with Nav2​

TODO: Add section on sensor integration (spec.md lines 945, 955)

Mermaid Diagram TODO: Create Isaac Sim + Nav2 Integration diagram (spec.md line 988)

TODO: Isaac Sim Sensors → ROS 2 Topics → Nav2 Stack → Velocity Commands → Isaac Sim Robot

Testing Navigation with Dynamic Obstacles​

TODO: Add section on dynamic obstacle testing (spec.md lines 946, 961)

Example TODO: Add dynamic obstacle avoidance example (spec.md line 961)

Behavior Trees in Nav2​

TODO: Explain behavior trees (spec.md line 954)

  • Waypoint following
  • Recovery behaviors

Practice Tasks​

Complete these exercises to master navigation in Isaac Sim:

Task 1: Install Nav2​

TODO: Add task details from spec.md line 992

Task 2: Configure Nav2 for Humanoid​

TODO: Add task details from spec.md line 993

Task 3: Send Navigation Goal​

TODO: Add task details from spec.md line 994

Task 4: Test Obstacle Avoidance​

TODO: Add task details from spec.md line 995

Summary​

TODO: Add summary points from spec.md lines 999-1004:

  • Navigation requirements (sensors, costmaps, planners)
  • Nav2 complete navigation stack
  • Global vs. local planning
  • Costmap composition
  • Isaac Sim physics-based testing
  • Behavior trees for complex navigation

References​

Next Chapter: Module 4 (Vision-Language-Action) - Coming soon! Continue implementing this template or proceed to the next module.