ISO 19364:2016

Overview

ISO 19364:2016 - "Passenger cars - Vehicle dynamic simulation and validation - Steady‑state circular driving behaviour" defines a repeatable method to validate vehicle dynamic simulation tools by comparing their outputs to measured test data from steady‑state circular driving tests. It applies to passenger cars (as defined in ISO 3833) and covers comparison against physical test procedures given in ISO 4138 or the alternative Slowly Increasing Steer Test (used in e.g. FMVSS 126 and UN/ECE R13‑H). The goal is to demonstrate that a simulation tool can predict steady‑state cornering behaviour within specified, documented tolerances.

Key topics and technical requirements

• Purpose: Compare simulation results from a mathematical vehicle model to measured data to validate the simulation tool for steady‑state circular driving tests.
• Test types: Constant‑radius (steady radius) and constant‑speed steady‑state cornering; Slowly Increasing Steer Test as an alternative.
• Core variables to compare:
  • Lateral acceleration (recommended measured directly via IMU)
  • Steering‑wheel angle
  • Sideslip angle
  • Roll angle
  • Steering‑wheel torque (if torque prediction is in scope)
• Simulation tool requirements: Models must represent vehicle mass distribution, tires, suspensions, steering, aerodynamics, brakes, powertrain, active controllers, data acquisition and driver inputs. Input data may be adapted to test conditions (e.g., road friction) but should not be manipulated to improve correlation.
• Physical testing: At least three repeat physical runs are required. Measured data may be low‑pass filtered and are plotted as cross‑plots (variables vs lateral acceleration).
• Comparison method: Simulation produces cross‑plot boundaries; measured data are overlaid and evaluated against boundary points and tolerances defined in the standard.

Practical applications and users

• Who uses this standard: Vehicle dynamics engineers, simulation tool developers, OEM validation teams, tier‑1 suppliers, test laboratories, and regulatory/approval bodies involved in handling and stability assessment.
• Practical uses:
  • Validate vehicle dynamic models for predicting steady‑state handling and cornering behavior.
  • Support model‑based development and variant analysis (e.g., new trim, powertrain, or suspension variants).
  • Provide documented evidence for simulation fidelity used in control system development (e.g., ESC tuning) and safety assessments.
  • Standardize correlation practices between test rigs / HIL setups and road test data.

Related standards

• ISO 4138 - Steady‑state circular driving behaviour (open‑loop test methods)
• ISO 15037‑1 - Vehicle dynamics test methods - General conditions for passenger cars
• ISO 3833 - Vehicle classification (passenger cars)
• FMVSS 126 and UN/ECE R13‑H - Regulations describing Slowly Increasing Steer type tests

Keywords: ISO 19364:2016, vehicle dynamic simulation, steady‑state circular driving, simulation validation, passenger cars, steady‑state cornering, Slowly Increasing Steer Test, cross‑plot comparison.