Title: Research and optimisation of the dynamic parameters of the QZSS embedded in the seat suspension system of the vehicles

Authors: Xiangjie Wang; Nguyen Van Liem; Shiming Li; Le Van Quynh

Addresses: School of Mechanical and Electronic Engineering, Suzhou University, Suzhou, 234000, China ' School of Mechanical and Electrical Engineering, Hubei Polytechnic University, Huangshi, China ' School of Mechanical and Electrical Engineering, Hubei Polytechnic University, Huangshi, China ' Faculty of Automotive and Power Machinery Engineering, Thai Nguyen University of Technology, Thai Nguyen, 23000, Vietnam

Abstract: A quasi zero-stiffness structure (QZSS) embedded to the seat suspension is proposed to improve the driver's ride quality. A dynamic model of the seat suspension added by the QZSS is established to analyse the effect of the QZSS's design parameters and geometrical ratios on the dimensionless restoring force and dimensionless dynamic stiffness of the system model. The QZSS's design parameters and geometrical ratios are then optimised via the genetic algorithm to obtain the quasi zero stiffness and minimum values of the seat's displacement and acceleration. The results show that the dimensionless restoring force and dimensionless dynamic stiffness are remarkably affected by the QZSS's design parameters. By optimising the QZSS's design parameters, the driver's ride comfort with the QZSS is greatly reduced in comparison to without the QZSS under the different simulation conditions. Therefore, the application of the QZSS optimised on the seat suspension can further improve the driver's ride quality.

Keywords: seat suspension; quasi-zero-stiffness structure; ride comfort; genetic algorithm; nonlinear dynamic model.

DOI: 10.1504/IJVSMT.2023.132323

International Journal of Vehicle Systems Modelling and Testing, 2023 Vol.17 No.1, pp.81 - 99

Received: 04 Aug 2022
Received in revised form: 29 Aug 2022
Accepted: 12 Sep 2022
Published online: 18 Jul 2023 *

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