Potential Vibration Isolation Qualities of Suspensions with a Two-Step Stiffness Control in Oscillation Cycle

K. V. Chernyshov, I. M. Ryabov, A. V. Pozdeev

Abstract


The article dwells upon the detection of potential vibration isolation qualities of suspensions with a two-step stiffness control during the oscillation cycle using the example of a single mass oscillating system. There are two principal schemes of two-step stiffness change of suspension of a vehicle: a suspension with constant step stiffness and a suspension with variable step stiffness. A comparative study of vibration isolation qualities of a single mass oscillating system with a two-step stiffness control which corresponds to the abovementioned principal schemes has been conducted. As a result of conducted study, the optimal parameters of suspensions were detected which ensure the stoppage of the sprung mass during half of the oscillation cycle when the system goes out of the state of equilibrium and when there is no kinematic and dynamic disturbance effect. Besides, the optimal parameters of suspensions have been detected which ensure the minimum deviations of the sprung mass from the neutral position, corresponding to the soft suspension, at kinematic sinusoidal input. It has been found that the suspension which is based on the diagram of two-step stiffness change of a suspension with constant step stiffness, provides higher vibration isolation qualities when used in a single mass oscillating system as compared to conventional uncontrolled suspension and suspension which is based on a two-step stiffness change diagram of suspension with variable step stiffness. The issue of high-frequency oscillation of a springing element as a result of a switch from higher stiffness to lower stiffness has been noted

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References


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DOI: http://dx.doi.org/10.24892/RIJIE/20180203

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