Knowledge hub
What is robotic simulation?The four parts of a simulator and why robots are trained in one.What is a physics engine?Movement, collisions and friction, one tiny step at a time.What is a solver?The numerical routine inside every engine, and the choices it forces.Traditional physics-based simulationCFD, FEA and multiphysics: OpenFOAM, STAR-CCM+, Ansys, COMSOL.AI-accelerated physicsNeural networks that imitate slow solvers in milliseconds.Which simulators exist today?Isaac Sim, MuJoCo and Gazebo in depth; the others in one line.What is reinforcement learning?Trial, reward and policy, and why it needs thousands of simulated robots.What is the sim-to-real gap?Where simulators lie, and how the gap is closed.World models and VLAsLearned simulators and end-to-end robot policies, 2024 to 2026.Digital twin vs. simulationTwo terms often confused, and the one thing that separates them.GlossaryURDF, USD, PPO, MPC, domain randomization, VLA and other terms.