{
  "engine": "Project Chrono / PyChrono body-roll dynamics",
  "engine_version": "9.0.1",
  "experiment": "Peak chassis roll from STEP rocker pickup ratio",
  "body_mass_kg": 800.0,
  "body_roll_inertia_kg_m2": 350.0,
  "track_width_m": 1.6,
  "roll_moment_arm_m": 0.5,
  "spring_stiffness_N_m": 200000.0,
  "spring_damping_N_s_m": 5000.0,
  "available_spring_stroke_m": 0.025,
  "required_wheel_travel_m": 0.04,
  "lateral_acceleration_pulses_m_s2": [2.5, 3.0],
  "pulse_start_s": 0.5,
  "pulse_duration_s": 2.0,
  "duration_s": 4.0,
  "time_step_s": 0.001,
  "required_relative_peak_roll_reduction": 0.5,
  "maximum_candidate_peak_roll_rad": 0.016,
  "spring_pickup_min_mm": 30.0,
  "spring_pickup_max_mm": 70.0,
  "maximum_pivot_error_mm": 0.00001,
  "maximum_wheel_pickup_error_mm": 0.00001,
  "maximum_relative_volume_change": 0.000001,
  "maximum_envelope_excess_mm3": 0.0001
}