Experimental Study of Dynamic Parameters on the Model of Electric Power Steering System

International Journal of Mechanical Engineering

© 2026 by SSRG - IJME Journal

Volume 13 Issue 3

Year of Publication : 2026

Authors : Bui Van Hai, Nguyen Xuan Tuan, Vu Hai Quan

10.14445/23488360/IJME-V13I3P102

How to Cite?

Bui Van Hai, Nguyen Xuan Tuan, Vu Hai Quan, "Experimental Study of Dynamic Parameters on the Model of Electric Power Steering System," SSRG International Journal of Mechanical Engineering, vol. 13,  no. 3, pp. 27-33, 2026. Crossref, https://doi.org/10.14445/23488360/IJME-V13I3P102

Abstract:

This study presents an experimental survey on the dynamic parameters of an Electric Power Steering System (EPS) using a dedicated experimental model developed for dynamic performance investigation. The proposed steering system model simulates steering wheel rotation and road-induced reaction forces through adjustable wheel loads, while simultaneously measuring key characteristic variables, including steering torque, steering angle, motor current, angular velocity, and reaction force at the steering wheel rim. Based on the experimental data, systematic analyses and comparisons between theoretical predictions and experimental results are conducted to determine the key factors affecting system dynamics and operational stability. The results indicate that the proposed experimental model accurately represents the dynamic characteristics of the EPS system under various operating conditions. Experimental investigations are performed at different simulated vehicle speeds of 0 (km/h), 40 (km/h), 60 (km/h), and 100 (km/h). The findings reveal a significant variation in the correlation between the driver’s input torque and assist torque as a function of vehicle speed. The maximum deviation between experimental results and the theoretical model across all speed conditions is less than 0.03%, confirming the high accuracy of the developed model and its effectiveness in capturing the dynamic behavior of the EPS. The proposed approach provides a reliable experimental platform for dynamic analysis and design optimization of EPS.

Keywords:

Assist torques, Electric Power Steering systems, Experimental modeling, Steering system dynamics, Steering torques.

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