Title: Assessing the efficiency of TPI-NSI and NSI-TPI in isolating the vibration of driver's seat

Authors: Lingling Zhang; Maohua Qiao

Addresses: School of Mechanical and Electrical Engineering, Jiaozuo University, Jiaozuo, Henan 454000, China ' Chaochuan Coal Mine of China Pingmei Shenma Holding Group Co., Ltd., Pingdingshan, Henan 454000, China

Abstract: This study proposes two isolation models for seat isolation using TPI-NSI and NSI-TPI based on the isolating performance of the negative stiffness isolation (NSI) in the vertical direction and three parallel isolations (TPI) in the pitch and roll directions to improve the driver comfort. To assess the isolating performance of TPI-NSI and NSI-TPI, their parameters are then analysed and optimised via the seat's dynamic model. Investigation result shows that NSI-TPI and TPI-NSI improvements in the vertical driver comfort are similar while TPI-NSI strongly improves the seat's pitch and roll angles in comparison with NSI-TPI. Moreover, with parameters of TPI-NSI optimised, seat accelerations in the vertical, pitch, and roll directions are obviously decreased by 20.1%, 20.0%, and 33.3% compared to the TPI-NSI's designed parameters. From the results of this theoretical study, the seat's TPI-NSI can be a potential new isolation approach to be applied and improve the comfort of vehicles.

Keywords: seat isolation system; seat dynamic model; NSI-TPI; TPI-NSI; driver comfort.

DOI: 10.1504/IJVNV.2024.138095

International Journal of Vehicle Noise and Vibration, 2024 Vol.20 No.1, pp.49 - 69

Received: 09 Jul 2023
Accepted: 04 Oct 2023
Published online: 29 Apr 2024 *

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