dora/examples/mujoco-sim/basic_simulation

• 01. Basic Simulation
• • • Running the Example
    • What's Happening
    • Configuration Details

01. Basic Simulation

This example demonstrates the simplest possible setup: loading and running a robot simulation using the dora-mujoco node.

• Understand how the dora-mujoco node works
• See how robot models are loaded from robot-descriptions
• Learn the basic dataflow for physics simulation

The simulation runs at 500Hz and outputs:

• Joint positions for all robot joints
• Joint velocities
• Sensor data (if available)
• Current simulation time

Running the Example

cd basic_simulation
dora build basic.yml
dora run basic.yml

You should see:

1. MuJoCo viewer window opens with GO2 robot
2. Robot is effected by gravity (enabled by default)

What's Happening

1. Model Loading: The dora-mujoco node loads the RoboDog (go2) model using load_robot_description("go2_mj_description")
2. Physics Loop: Timer triggers simulation steps at 500Hz (This is default step time for Mujoco)
3. Data Output: Joint states are published
4. Visualization: MuJoCo viewer shows real-time simulation

Configuration Details

The basic.yml configures:

• Model name: "go2" you change this to other robots name
• Update rate: 2ms (500Hz)
• Outputs: Joint positions, velocities, and sensor data