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Appl. Sci. 2017, 7(6), 570;

Influence of Road Excitation and Steering Wheel Input on Vehicle System Dynamic Responses

School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
LAMIH UMR CNRS 8201, University of Valenciennes, 59314 Valenciennes, France
College of Mechanical Engineering & Applied Electronics Technology, Beijing University of Technology, Beijing 100024, China
Author to whom correspondence should be addressed.
Academic Editor: Giuseppe Lacidogna
Received: 23 March 2017 / Revised: 9 May 2017 / Accepted: 26 May 2017 / Published: 2 June 2017
(This article belongs to the Section Mechanical Engineering)
PDF [3376 KB, uploaded 2 June 2017]


Considering the importance of increasing driving safety, the study of safety is a popular and critical topic of research in the vehicle industry. Vehicle roll behavior with sudden steering input is a main source of untripped rollover. However, previous research has seldom considered road excitation and its coupled effect on vehicle lateral response when focusing on lateral and vertical dynamics. To address this issue, a novel method was used to evaluate effects of varying road level and steering wheel input on vehicle roll behavior. Then, a 9 degree of freedom (9-DOF) full-car roll nonlinear model including vertical and lateral dynamics was developed to study vehicle roll dynamics with or without of road excitation. Based on a 6-DOF half-car roll model and 9-DOF full-car nonlinear model, relationship between three-dimensional (3-D) road excitation and various steering wheel inputs on vehicle roll performance was studied. Finally, an E-Class (SUV) level car model in CARSIM® was used, as a benchmark, with and without road input conditions. Both half-car and full-car models were analyzed under steering wheel inputs of 5°, 10° and 15°. Simulation results showed that the half-car model considering road input was found to have a maximum accuracy of 65%. Whereas, the full-car model had a minimum accuracy of 85%, which was significantly higher compared to the half-car model under the same scenario. View Full-Text
Keywords: dynamics modeling; 3-D road excitation; vehicle roll; CARSIM® simulation dynamics modeling; 3-D road excitation; vehicle roll; CARSIM® simulation

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Wang, Z.-F.; Dong, M.-M.; Gu, L.; Rath, J.-J.; Qin, Y.-C.; Bai, B. Influence of Road Excitation and Steering Wheel Input on Vehicle System Dynamic Responses. Appl. Sci. 2017, 7, 570.

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