前馈
控制理论(社会学)
悬臂梁
振动
主动振动控制
振动控制
控制器(灌溉)
梁(结构)
非线性系统
频道(广播)
工程类
输入整形
计算机科学
控制(管理)
控制工程
声学
结构工程
物理
电气工程
人工智能
生物
量子力学
农学
作者
Qiao Zhu,Jun-Zhou Yue,Xudong Wang,Jun Chen,Guangdi Hu
标识
DOI:10.1088/1361-665x/aa64c6
摘要
This work is focused on the active vibration control of piezoelectric cantilever beam, where an adaptive feedforward controller (AFC) is utilized to reject the vibration with unknown multiple frequencies. First, the experiment setup and its mathematical model are introduced. Due to that the channel between the disturbance and the vibration output is unknown in practice, a concept of equivalent input disturbance (EID) is employed to put an equivalent disturbance into the input channel. In this situation, the vibration control can be achieved by setting the control input be the identified EID. Then, for the EID with known multiple frequencies, the AFC is introduced to perfectly reject the vibration but is sensitive to the frequencies. In order to accurately identify the unknown frequencies of EID in presence of the random disturbances and un-modeled nonlinear dynamics, the time–frequency-analysis (TFA) method is employed to precisely identify the unknown frequencies. Consequently, a TFA-based AFC algorithm is proposed to the active vibration control with unknown frequencies. Finally, four cases are given to illustrate the efficiency of the proposed TFA-based AFC algorithm by experiment.
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