Isolation efficiency of the EV seat's suspension using the various NSE modes
by Changpei Shang; Vanliem Nguyen; Jili Zha; Yuanyuan Niu
International Journal of Vehicle Noise and Vibration (IJVNV), Vol. 19, No. 3/4, 2023

Abstract: To compare the efficiency of the operator's seat suspension of the electric vehicles using the control isolation systems, vehicle's control isolations and seat suspension equipped with negative-stiffness-element designed by tuned-mass-damper (C-TMD-NSE) and air-piston (C-AP-NSE) are proposed to improve the operator's ride quality. The vehicle's vibration model has been built based on excitations from road surfaces and in-wheel motors. The efficiency of C-TMD-NSE and C-AP-NSE is estimated through the reduction of the root-mean-square acceleration of the operator's seat (a_ws). The results indicate that C-TMD-NSE and C-AP-NSE embedded in the vehicle's isolation systems ameliorate ride quality better than without C-NSE. Besides, a_ws with C-AP-NSE is also decreased compared to C-TMD-NSE under the changes of road surfaces and total mass of the in-wheel motor and rotor's eccentricity. Particularly, a_ws with C-AP-NSE is smaller than that of C-TMD-NSE by 27%. Thus, the C-AP-NSE could be supported into seat's suspension to ameliorate vehicle's ride efficiency.

Online publication date: Mon, 15-Jan-2024

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