Title: Analysis on driving stability of micro-vehicle based on human-seat dynamics system
Authors: Hongyu Shu; Shuang Luo; Zejie Yao
Addresses: State Key Laboratory of Mechanical Transmission, Chongqing University, No. 174, Shazhengjie Street, Shapingba District, Chongqing, 400044, China ' State Key Laboratory of Mechanical Transmission, Chongqing University, No. 174, Shazhengjie Street, Shapingba District, Chongqing, 400044, China ' State Key Laboratory of Mechanical Transmission, Chongqing University, No. 174, Shazhengjie Street, Shapingba District, Chongqing, 400044, China
Abstract: To study the influence of dynamics interaction between a driver and a micro-vehicle on the driving stability, the driver was modelled as a rigid body and elastically connected to the vehicle. A 5-DOF (degree of freedom) mathematical model was presented for the driver micro-vehicle system. Afterwards, a vibration test was conducted and a corresponding vibration model was developed for the human-seat system, based on which the biomechanical parameters at human-seat interface were obtained. Eventually, the mathematical model was computed by Matlab in line with those parameters. Influences of the dynamics interaction on the roll and yaw characteristics of the micro-vehicles were analysed. According to the research results, the dynamics interaction prolongs the response time; meanwhile, it increases the overshoot and steady-state value of roll angle, and generates less understeer. With the decrease in curb weight of the micro-vehicles, the influences will be more significant.
Keywords: micro-vehicle; driver; human-seat system; driving stability; stable steering characteristic; numerical analysis; dynamics interaction; biomechanical parameters; roll angle; yaw rate.
International Journal of Vehicle Design, 2018 Vol.77 No.4, pp.272 - 285
Accepted: 19 Feb 2019
Published online: 20 May 2019 *