A Piecewise Hysteresis Model for a Damper of HIS System

Kaidong Tian,Nong Zhang,Bangji Zhang,Jinchen Ji,Xuhui Liu

doi:10.1155/2016/9091783

Kaidong Tian, Nong Zhang + Show 3 more

Open Access

https://doi.org/10.1155/2016/9091783

Copy DOI

Abstract

A damper of the hydraulically interconnected suspension (HIS) system, as a quarter HIS, is prototyped and its damping characteristic is tested to characterize the damping property. The force-velocity characteristic of the prototype is analyzed based on a set of testing results and accordingly a piecewise hysteresis model for the damper is proposed. The proposed equivalent parametric model consists of two parts: hysteresis model in low speed region and saturation model in high speed region which are used to describe the hysteresis phenomenon in low speed and nonhysteresis phenomenon in high speed, respectively. The parameters of the model are identified based on genetic algorithm by setting the constraints of parameters according to their physical significances and the corresponding testing results. The advantages of the model are highlighted by comparing to the nonhysteresis model and the permanent hysteresis model. The numerical simulation results are compared with the testing results to validate the accuracy and effectiveness of the proposed model. Finally, to further verify the proposed model’s wide applicability under different excitation conditions, its results are compared to the testing results in three-dimensional space. The research in this paper is significant for the dynamic analysis of the HIS vehicle.

Highlights

As the suspension is the key part influencing the vehicle posture, ride comfort, road holding, and vehicle agility [1], the accuracy of its model is important for precisely predicting the properties of the vehicle
This kind of model can describe the mechanism of the system in detail, for example, the nonlinear physical parametric model containing 82 parameters developed by Lang [8] and the nonlinear hysteretic parametric models developed by Reybrouck et al [9, 10]
An equivalent parametric model consisting of a dashpot, a spring, a backlash, and friction elements was developed by Karadayi and Masada, which can fit the testing results of low frequency well and describe the hysteresis phenomenon by considering the damping force as

Summary

Introduction

As the suspension is the key part influencing the vehicle posture, ride comfort, road holding, and vehicle agility [1], the accuracy of its model is important for precisely predicting the properties of the vehicle. Physical parametric models indicate these models which consider the oil flow rate and the valves deformation inside the damper so that the fluid equations are coupled to the mechanical equations. This kind of model can describe the mechanism of the system in detail, for example, the nonlinear physical parametric model containing 82 parameters developed by Lang [8] and the nonlinear hysteretic parametric models developed by Reybrouck et al [9, 10]. An equivalent parametric model consisting of a dashpot, a spring, a backlash, and friction elements was developed by Karadayi and Masada, which can fit the testing results of low frequency well and describe the hysteresis phenomenon by considering the damping force as

Objectives

Methods

Discussion

Conclusion