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。
The performance of QZS isolation system was uncertain in the jumping frequency do- main. 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 un- stable 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 frequen- cy domain and broadens the frequency range of effective isolation of QZS vibration isolation system.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2014年第2期230-235,共6页
China Mechanical Engineering
基金
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)
关键词
非线性隔振
阻尼控制
低频隔振
准零刚度
nonlinear vibration isolation
damping control
low-- frequency vibration isolation
qua- si- zero stiffness（QZS）
