Effect of delayed resonator on the vibration reduction performance of vehicle active seat suspension

Yongguo Zhang,Chuanbo Ren,Zhen Xu,Kehui Ma,Pengcheng Zhou,Yajie Chen

doi:10.1177/14613484211046458

Yongguo Zhang, Chuanbo Ren + Show 4 more

Open Access

https://doi.org/10.1177/14613484211046458

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Abstract

The combination of dynamic vibration absorber and partial state feedback with time-delay is called delayed resonator. In order to suppress the seat vibration caused by uneven road surface and improve ride comfort, the delayed resonator is applied to the seat suspension to realize active control of the seat suspension system. The dynamic model of the half-vehicle suspension system is established, and the time-delay differential equation of the system under external excitation is solved by the precise integration method. The root mean square of the time-domain vibration response of seat displacement, seat acceleration and vehicle acceleration are selected as the objective function. Then, the optimal time-delay control parameters are obtained by particle swarm optimization algorithm. The frequency sweeping method is used to obtain the critical time-delay value and time-delay stable interval of the system. Finally, an active seat suspension model with delayed resonator is established for numerical simulation. The results show that the delayed resonator can greatly suppress the seat vibration response regardless of the road simple harmonic excitation or random excitation. Compared with dynamic vibration absorber, it has a better vibration absorption effect and a wider vibration reduction frequency band.

Highlights

Research on the suppression of vehicle vibration has been widely carried out
Compared with the passive seat suspension, under the control of Dynamic vibration absorber (DVA), the root mean square (RMS) of seat vibration displacement, velocity, and acceleration are reduced by 31%, 33%, and 32%, respectively, and the RMS of body acceleration and pitching acceleration are reduced by 7% and 2%
The delayed resonator (DR) is applied to the seat vibration control of a half-vehicle model

Summary

Introduction

Research on the suppression of vehicle vibration has been widely carried out. Koumene Taffo et al. chose the nonlinear quarter-vehicle model as the research object and analyzed the parameter resonance problem under time-delay displacement feedback and velocity feedback. The vehicle is a complex multi-DOF dynamics model, and it is one-sided to study the suspension vibration reduction effect of time-delay control on the quarter-vehicle model. Taking a half-vehicle model as the research object, an active seat suspension control method based on DR is proposed. Substituting equation [11] into equations [2,3,4] so that the seat acceleration, body acceleration, and pitching acceleration of the system at each time node are as follows Through this method, different road surface excitation can be directly introduced into the solution and optimization of time-delay control parameters. The time-delay control parameters with the minimum time-domain vibration response of the system under the action of DR can be obtained

Objective function

Findings

Conclusion