{
  "engine": "Project Chrono / PyChrono",
  "engine_version": "9.0.1",
  "experiment": "STEP-meshed tray under sinusoidal lateral inertial acceleration",
  "material_density_kg_m3": 7800.0,
  "gravity_m_s2": 9.81,
  "contact_friction": 0.2,
  "contact_restitution": 0.1,
  "ball_radius_m": 0.01,
  "ball_density_kg_m3": 1000.0,
  "release_x_m": [-0.02, 0.0, 0.02],
  "release_y_m": -0.07,
  "lateral_acceleration_m_s2": 11.0,
  "vibration_frequency_hz": 1.0,
  "escape_center_x_m": 0.135,
  "minimum_gold_ball_excursion_m": 0.08,
  "duration_s": 3.0,
  "time_step_s": 0.0005,
  "maximum_relative_mass_change": 1e-6,
  "maximum_envelope_change_mm": 1e-6,
  "maximum_external_added_mm3": 0.0001,
  "maximum_floor_missing_mm3": 0.0001,
  "maximum_mount_missing_mm3": 0.0001
}