Electronic Stability Control Assessment Methods: A Study in the Correlation Between Subjective Assessment and Objective Measurement in Vehicle Testing

Abstract

This report describes the work to include objective measurement methods in real car electronic stability control testing, conducted at CEVT vehicle dynamics department. Current testing methodology is focused on subjective assessment by the driver, with no objective way to judge test data. By post processing logged test data from single and double lane change maneuvers and correlating it to the subjective assessment of the test driver, objective rating methods were established. To gather reliable data, dedicated vehicle testing of both Lynk & Co and competitor cars was carried out at Volvo Hällered Proving Ground by expert drivers. To measure the performance of competitor cars, a new measurement equipment set-up was created for benchmark testing, consisting of steering effort sensor and inertial measurement unit. As part of the project, a simulation study of single lane change was also carried out, to enhance understanding of the vehicle’s behavior and to bridge the gap between simulation and real car testing. The simulation drive case was also tested in the real vehicle. The result of these processes is rating limits on side slip, yaw rate, longitudinal jerk and longitudinal velocity delta for both single and double lane change. When verified these limits can be the foundation for objective requirements on single and double lane change performance.