What is ISO 21233 about ?
ISO 21233 specifies a method for comparing simulation results from a vehicle model to measured test data for an existing vehicle according to closing-curve tests as specified in ISO 11026. The purpose of the validation is to demonstrate that the vehicle dynamics simulation, combined with an integrated electronic stability control (ESC) system, can predict the roll and yaw stability behaviour of a physical vehicle, including the ESC system interventions, during a closing-curve test. The simulation method can be either hardware-in-the-loop [with the original electronic control unit (ECU) on a HiL test stand] or software-in-the-loop, based on a software code generated from the same source as for the ECU in the real vehicle.
ISO 21233 applies to heavy vehicles, including commercial vehicles, commercial vehicle combinations, buses and articulated buses as defined in ISO 3833 (trucks and trailers with a maximum weight above 3,5 tonnes and buses and articulated buses with a maximum weight above 5 tonnes, according to ECE and EC vehicle classification, categories M3, N2, N3, O3 and O4).
Who is ISO 21233 for ?
ISO 21233 on vehicle dynamics simulation and validation — closing-curve test is applicable to:
- Vehicle safety testing facilities
- Vehicle manufacturers
- Vehicle regulatory authorities
- Commercial vehicle users
- Commercial vehicle manufacturers
Why should you use ISO 21233 ?
The dynamic behaviour of a road vehicle is a very important aspect of active vehicle safety. Any given vehicle, together with its driver and the prevailing environment, constitutes a closed-loop system that is unique. The task of evaluating the dynamic behaviour is therefore very difficult since the significant interactions of these driver–vehicle–environment elements are each complex in themselves.
ISO 21233 provides a repeatable and discriminatory method for comparing simulation results to measured test data from a physical vehicle for a specific type of test.
ISO 21233 demonstrates that the vehicle dynamics simulation, combined with an integrated electronic stability control (ESC) system, can predict the roll and yaw stability behaviour of a physical vehicle, including the ESC system interventions, during a closing-curve test. This will help you in improving the safety of the vehicle.
