Title: Modelling and dynamic analysis of vehicles based on discrete constraints

Authors: Ke Shao; Kang Huang; Songlin Duan; Shengchao Zhen; Feng Gao

Addresses: School of Mechanical Engineering, Hefei University of Technology, Hefei 230001, China ' School of Mechanical Engineering, Hefei University of Technology, Hefei 230001, China ' School of Mechanical Engineering, Hefei University of Technology, Hefei 230001, China ' School of Mechanical Engineering, Hefei University of Technology, Hefei 230001, China ' School of Mechanical Engineering, Hefei University of Technology, Hefei 230001, China

Abstract: In this paper, a novel approach to modelling and dynamic analysis of full vehicle is proposed based on Udwadia-Kalaba theory. Because the vehicle is hierarchically modelled by using this approach, this approach is easily processed when handling the modelling of many-degrees-of-freedom vehicle. Also, the analytical dynamic model based on this approach is free of calculation of Lagrangian multiplier as used in the Lagrangian equation. To verify this approach, a 15 DOF vehicle is modelled in this paper by using Udwadia-Kalaba theory. Four tyres' displacement is exerted and the vertical dynamic behaviour of each subsystem is simulated and analysed in MATLAB. By solving Udwadia-Kalaba equation, the response of each subsystem is acquired. The simulation result is well coincident with that of the Lagrangian model, which verifies the proposed approach.

Keywords: full vehicle; dynamic behaviour; mechanics analysis; Udwadia-Kalaba theory; subsystem.

DOI: 10.1504/IJVD.2017.090903

International Journal of Vehicle Design, 2017 Vol.75 No.1/2/3/4, pp.23 - 46

Accepted: 09 Aug 2017
Published online: 03 Apr 2018 *

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