{
  "engine": "Project Chrono / PyChrono",
  "engine_version": "9.0.1",
  "experiment": "pivoted STEP-derived striker colliding with a guided target block",
  "material_density_kg_m3": 7800.0,
  "initial_rotational_energy_J": 0.03,
  "initial_angle_deg": 20.0,
  "target_mass_kg": 0.5,
  "target_center_m": [0.02, 0.08, 0.0],
  "target_center_x_cases_m": [0.019, 0.02, 0.021],
  "target_size_m": [0.02, 0.02, 0.01],
  "contact_stiffness_N_m": 200000.0,
  "contact_damping_N_s_m": 40.0,
  "contact_friction": 0.0,
  "duration_s": 0.15,
  "time_step_s": 0.00025,
  "required_relative_target_speed_gain": 0.1,
  "maximum_relative_mass_change": 1e-6,
  "maximum_envelope_change_mm": 1e-6,
  "maximum_external_added_mm3": 0.0001,
  "maximum_exterior_removed_mm3": 0.0001,
  "maximum_center_xz_offset_mm": 0.0001
}