Study on Vibration Attenuation in Jumping Frequency Interval of Quasi-zero Stiffness Vibration Isolator

China Mechanical Engineering ›› 2014, Vol. 25 ›› Issue (2): 230-235.

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Study on Vibration Attenuation in Jumping Frequency Interval of Quasi-zero Stiffness Vibration Isolator

Xu Daolin;Yu Qiping;Zhou Jiaxi;Zhang Jing

State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body,Hunan University,Changsha,410082

Online:2014-01-25 Published:2014-02-19
Supported by:
National Natural Science Foundation of China（No. 11072075）;Supported by China Postdoctoral Science Foundation（No. 20100480938）

准零刚度隔振系统跳跃频率区间隔振研究

徐道临;余奇平;周加喜;张敬

湖南大学汽车车身先进设计制造国家重点实验室,长沙,410082

基金资助:
国家自然科学基金资助项目(11072075);中国博士后科学基金资助项目（20100480938);汽车车身先进设计制造国家重点实验室基金资助项目（50970002）

Abstract

Abstract:

The performance of QZS isolation system was uncertain in the jumping frequency domain. To solve this problem, this paper proposed a damping perturbation control method. When the system damping was increased to a certain extent, the jump-down frequency will be lower than the excitation frequency. The large amplitude vibration response on the resonance branch will become unstable and drop to the non-resonance branch with small oscillation. The von der Pol plane was used to determine the timing of withdrawnness of the control to ensure that the vibration state ultimately rested on the non-resonance branch. The method makes attenuation available in the jumping frequency domain and broadens the frequency range of effective isolation of QZS vibration isolation system.

Key words: nonlinear vibration isolation, damping control, low-frequency vibration isolation, quasi-zero stiffness（QZS）

摘要：

基于跳跃频率区间内准零刚度隔振系统的隔振效果具有不确定性的问题,提出了一种阻尼扰动控制方法。当控制系统阻尼增大到一定程度时,向下跳跃频率将低于激振频率,在原共振支上的大幅振动响应便会失稳并跌落到低幅振动的非共振支上,在此过程中借助范德波尔平面来判断何时撤除阻尼控制,从而实现了跳跃频率区间内的有效隔振，拓宽了准零刚度隔振系统的有效隔振频率区间。

关键词: 非线性隔振, 阻尼控制, 低频隔振, 准零刚度

CLC Number:

O328

Xu Daolin, Yu Qiping, Zhou Jiaxi, Zhang Jing. Study on Vibration Attenuation in Jumping Frequency Interval of Quasi-zero Stiffness Vibration Isolator[J]. China Mechanical Engineering, 2014, 25(2): 230-235.

徐道临, 余奇平, 周加喜, 张敬. 准零刚度隔振系统跳跃频率区间隔振研究[J]. 中国机械工程, 2014, 25(2): 230-235.

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Study on Vibration Attenuation in Jumping Frequency Interval of Quasi-zero Stiffness Vibration Isolator

准零刚度隔振系统跳跃频率区间隔振研究

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