一种弯曲型压电堆作动器的设计及在振动控制中的应用

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振动与冲击 ›› 2009, Vol. 28 ›› Issue (9) : 130-138,.

论文

一种弯曲型压电堆作动器的设计及在振动控制中的应用

杨智春,王巍,谷迎松,李斌

作者信息 +

Smart Structure Vibration Control Using a New Bending Type of Piezoelectric Stack Actuator

Yang Zhichun，Wang Wei，Gu Yingsong, Li bin

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文章历史 +

摘要

提出了一种弯曲型压电堆作动器并将其应用于悬臂梁主动振动控制中。新型作动器由一个压电堆和一个型金属底座和一个预压螺钉组成。该作动器的通过底座对压电堆纵向变形的约束而使底座弯曲变形产生作动弯矩。推导了新型作动器的输出作动弯矩计算公式，并将其应用于悬臂梁振动控制中，采用热弹比拟方法结合状态空间理论建立了带新型压电作动器的悬臂梁振动控制系统状态空间方程。分别应用正位置反馈（Positive position feedback，PPF）和神经网络预测（Neural network predictive，NNP）控制方法设计了主动振动控制系统。闭环仿真结果表明，采用本文提出的新型压电堆作动器控制悬臂梁的一弯模态位移响应，应用PPF控制其幅值可降低57%，应用NNP控制其幅值可降低92%。

Abstract

A new (pi) shape piezoelectric stack actuator (PISA) is designed and applied to the vibration control of a cantilevered beam. This new actuator consists of a piezoelectric stack and a shape metal pedestal. They are assembled together by a screw which provides the preload needed by the piezoelectric stack. The pedestal is designed to act as an external lever which will generate and transfer actuating moment to the structure. The pedestal makes PISA be a bending type actuator. Its bottom provides a flat bonding surface for PISA in vibration control applications. The actuation moment of PISA is derived and then it is used in a vibration control system for a cantilevered beam. Positive position feedback (PPF) control and neural network predictive (NNP) control strategies are adopted to control the first bending mode vibration of the beam. Simulation results demonstrate that, the amplitude of the first bending mode of the cantilever beam can be suppressed by 92% using NNP control strategy, while using PPF control strategy the amplitude can be reduced by about 57%. The results demonstrate that the proposed PISA can serve as a high efficiency piezoelectric actuator in structure vibration control applications.

导出引用

杨智春;王巍;谷迎松;李斌. 一种弯曲型压电堆作动器的设计及在振动控制中的应用[J]. 振动与冲击, 2009, 28(9): 130-138,

Yang Zhichun;Wang Wei;Gu Yingsong;Li bin. Smart Structure Vibration Control Using a New Bending Type of Piezoelectric Stack Actuator[J]. Journal of Vibration and Shock, 2009, 28(9): 130-138,

中图分类号： TB53 TB381