Abstract
The quasi-zero-stiffness system (QZS) is a nonlinear vibration isolation system, when the excitation frequency is in the multi-solution domain, the system may malfunctions in vibration attenuation. To solve this problem, the damping control method is introduced in this paper. The main idea is that the response on the resonance branch with large amplitude can switches to the non-resonance branch with small amplitude by controlling system damping, and it can stay on the non-resonance branch in the next process, which makes vibration isolation is also available in this interval. During this process, the Van den Pol plane is used to determine the time of which damping control can be withdrawn.
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