一种半主动自参数吸振器的设计与分析研究  

Study on Design and Analysis of a Semi-active Auto-parametric Vibration Absorber

作　　者：田缀 TIAN Zhui(Xidian University,Xi’an 710071,China)

机构地区：[1]西安电子科技大学,陕西西安710071

出　　处：《电子机械工程》2021年第3期46-50,共5页Electro-Mechanical Engineering

摘　　要：文中首先研究了由单摆自参数吸振器和主系统组成的两自由度的自参数振动系统,通过理论分析得到了自参数振动系统的解的形式以及半平凡解的稳定边界;其次,为了充分发挥自参数吸振器的吸振能力,提出半主动控制的方法,通过主动调节单摆的摆长,使其摆的固有频率跟踪主系统的外激励的频率;最后,通过数值仿真验证了被动与半主动单摆自参数吸振器对线性主系统的减振效果,仿真结果证明了半主动自参数单摆具有更好的减振性能。This paper numerically considers an auto-parametrically coupled system,that is a pendulum-type auto-parametric vibration absorber(AVA)applied to a primary oscillator excited by the external harmonic excitation.The stability of the semi-trivial solution,which is the solution corresponding to the case with nonoscillating and non-excited pendulum-type AVA,is investigated.And then,in order to improve the performance of the passive pendulum device,a semi-active pendulum-type AVA with the linearly tunable length according to the linear sweeping excitation frequency is also proposed.Finally,the numerical results demonstrate the effectiveness of passive and semi-active pendulum-type AVA for the vibration reduction of a linear primary structure.And the simulation results show that the semi-active pendulum-type AVA improve the performance of the passive one very well.

关 键 词：半平凡解稳定性 自参数吸振器 半主动控制方法 线性可调节摆长 

分 类 号：TB535[理学—物理]