Abstract
A quasi zero stiffness (QZS) vibration isolator can be realized through parallel connection of a positive stiffness and a negative one. Here, the dynamic features of a QZS vibration isolator composed of two oblique springs and a vertical spring under the simple harmonic excitation were studied. Introducing the linear displacement time-delay control strategy, the dynamic response characteristics of the system under the simple harmonic excitation were obtained with the averaging method. The first-order Lyapunov approximate stability theory and Routh-Hurwitz criterion were adopted to analyze the stability, jump phenomenon and Hopf bifurcation of the controlled system. The results showed that the time-delay control strategy can effectively improve the stability of the QZS vibration isolator; jump phenomenon and Hopf bifurcation can be avoided through choosing appropriate control parameters.
| Translated title of the contribution | Dynamical analysis of a QZS vibration isolator with time-delay control |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 49-55 |
| Number of pages | 7 |
| Journal | Zhendong yu Chongji/Journal of Vibration and Shock |
| Volume | 37 |
| Issue number | 13 |
| DOIs | |
| State | Published - 15 Jul 2018 |
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