Abstract
In this study, codimension-two bifurcation analysis was used in conjunction with a novel control method to mediate chaos in a semi-active suspension system based on a quarter-car model with excitat...
Highlights
Vehicle suspension systems are meant to isolate the body of the vehicle from oscillations produced by a rough surface road profile
This study focused on rich nonlinear dynamic behaviors in a vehicle suspension system with hysteretic damping
The resulting bifurcation diagram indicates the existence of a quasi-periodic orbit and chaotic motion in the suspension system, thereby demonstrating the effectiveness of using the Lyapunov exponent as a tool for identifying chaotic motion
Summary
Vehicle suspension systems are meant to isolate the body of the vehicle (and their occupants) from oscillations produced by a rough surface road profile. They are meant to maintain continuous contact between wheels and the surface of the road. Ride comfort requires a long suspension stroke and low damping in wheel-hop mode.[1] The development of smart materials has prompted research into intelligent vehicle suspension systems featuring hysteretic damping characteristics based on electro-rheological fluid or magnetorheological fluid.[2,3,4,5] The hysteretic nature of damping forces in vehicle suspension systems under excitation means that they can be modeled as a multi-frequency harmonic function. Vehicle suspension can be simplified as a hysteretic nonlinear system with multifrequency excitation
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