Research on fast load prediction method for steering system based on vehicle trajectory
FENG Jinzhi
DING Yi
ZHAO Lihui
LIU Dongjian
ZHANG Dongdong
Abstract：[Objective]To address the difficulties in obtaining load data for traditional steering systems under real-world customer usage conditions,which hinders effective support for reliability design and test evaluation,a rapid prediction method for global loads of steering systems based on vehicle trajectory was proposed.[Methods]Firstly,a two-degree-of-freedom lateral dynamics model and a steering system mechanical model were established.Secondly,utilizing vehicle GPS trajectory data,the turning curvature was calculated employing the Haversine formula.Then,the yaw rate and sideslip angle were derived inversely,followed by the calculation of the lateral force and aligning torque.Finally,by integrating the mechanical relationships of the steering system,rapid predictions of the steering wheel angle,tie-rod displacement,and steering tie-rod force were achieved.The model accuracy was verified under extreme conditions,and the influence laws of turning curvature and vehicle speed on load characteristics were analyzed.[Results]The research demonstrates that the proposed method can effectively predict the key loads of the steering system,with the prediction error for the steering wheel angle being less than 3.5%.The loads increase significantly with the increase in turning curvature and vehicle speed.The influence of turning curvature on the steering tie-rod force is particularly prominent,showing a nonlinear growth trend in the high curvature range.This method can provide effective support for the reliability evaluation of steering systems under customer usage conditions and the load design for bench tests.
Keywords：Steer-By-Wire systemGPS trajectory dataTurning curvatureLoadFast prediction
Publication Date：2026-01-31
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：9( 124-132 )