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πŸ—‚οΈ MoSim Dataset

Official release of the dataset from the paper:
Neural Motion Simulator: Pushing the Limit of World Models in Reinforcement Learning

This dataset contains sequential state-action trajectories for training and evaluating MoSim (Neural Motion Simulator) world models.
All trajectories are collected from random policies in classical control and locomotion environments.


πŸ“¦ Dataset Overview

  • Format: .npz (NumPy compressed arrays)
  • Contents:
    • *_random.npz: training episodes
    • *_random_test.npz: test episodes
  • Episode length: 1000 steps per episode

πŸ“Š Data Structure

Each .npz file contains:

Key Shape Description
states (num_episodes, 1000, state_dim) State at each timestep
actions (num_episodes, 1000, action_dim) Action applied at each timestep

State composition:

  1. Joint DOF (articulated body)
    • Joint angles (radians)
    • Joint angular velocities (rad/s)
  2. Root DOF (global free body)
    • Root position (x, y, z)
    • Root linear velocity (vx, vy, vz)
  3. Root Orientation & Rotation
    • Root rotation quaternion (qx, qy, qz, qw)
    • Root angular velocity (wx, wy, wz)

⚑ For manipulation control tasks like Panda, only joint angles and velocities are provided.
⚑ For locomotion tasks like Humanoid or Go2, full root DOF and velocities are included.


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