Process

Simulation

You might say: sim, digital twin

A simulator advances a virtual robot and environment with a physics model, sensors and the robot's software interfaces.

What it does

It tests and trains software before hardware is exposed to the task.

Ask

Which dynamics, contacts, sensors and timing behaviors does this simulator get wrong?

Parts

• Sim-to-real transfer: Sim-to-real transfer makes simulated behavior work on hardware despite differences in friction, masses, delays, contacts and sensor noise.

Catalogue: Simulator

• Gazebo: Gazebo Sim runs 3D worlds from SDF and connects to ROS or Gazebo Transport; it supports headless server operation.
• MuJoCo: MuJoCo is an articulated-body physics engine with contact dynamics, sensors and actuators.
• NVIDIA Isaac Sim / Lab: Isaac Sim imports robot assets, simulates physics and sensors, generates synthetic data and validates ROS 2 stacks.
• Drake: Drake is a model-based toolbox for multibody dynamics, simulation, optimization and control-system analysis.

Connections

• Made from: Robot description (URDF)

Sources

1. Gazebo, Getting Started with Gazebo, Gazebo Sim, SDF worlds and ROS integrationAfter installing Gazebo in Step 1, you can launch Gazebo Sim, a 3D robotics simulator, from a terminal.
2. DeepMind, MuJoCo Overview, Articulated dynamics, contact, sensors and model-based computationforward dynamics and advances the state of the simulation
3. NVIDIA, What Is Isaac Sim?, Robot import, physics, sensors, synthetic data and ROS 2 validationImport robots and scenes from URDF, MJCF, Onshape CAD, or USD. Simulate with PhysX or Newton, add RTX and physics-based sensors, generate synthetic data, prepare robots for Isaac Lab, and validate robot stacks with ROS 2.
4. Drake Development Team, Drake: Model-Based Design and Verification for Robotics, Modeling dynamical systems, multibody dynamics, optimization and simulationIt is a collection of tools for analyzing the dynamics of our robots and building control systems for them, with a heavy emphasis on optimization-based design/analysis.

Use it on your project

teardown-apply: hold "Simulation" (simulation) from the teardown at https://teardownatlas.com/robotics/ against my project

Paste it into a coding agent that has the teardown skills.

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