Active and passive controllable vibration isolating device based on piezoelectric photonic crystal

Abstract

The invention provides an active and passive controllable vibration isolating device based on a piezoelectric photonic crystal. The device comprises a connecting bottom plate, a piezoelectric photonic crystal vibration isolating structure and an acceleration sensor fixedly connected with the connecting bottom plate, and an electric terminal control system; the piezoelectric photonic crystal vibration isolating structure is a layer structure formed by alternately arraying piezoelectric material scatterers and passive material basal bodies; each layer of piezoelectric material scatterers is polarized in the incidence direction parallel to vibration; all layers of piezoelectric material scatterers are consistently arrayed according to the polarization direction; an electrode plate is arranged between each layer of piezoelectric material scatterers and the corresponding passive material basal body; and the electrode plate is connected with an electrode lead. The active and passive controllable vibration isolating device can realize vibration control of low and medium frequency ranges, can adjust vibration isolation frequency and vibration isolation amplitude and can also realize vibration isolation effect of a high frequency range to be enabled to be particularly suitable for the vibration isolation occasions under multiple working conditions and of the low frequency range.

Description

technical field [0001] The invention relates to an active and passive controllable vibration isolation device based on piezoelectric phononic crystals, and belongs to the technical fields of vibration control, phononic crystal materials, and the like. Background technique [0002] Vibration isolation technology is a hot issue in the field of vibration control research today. It is widely used in ship design, aerospace, precision manufacturing and processing, etc., especially vibration isolation technology under multiple working conditions and low frequency conditions is an urgent need in the field of vibration control. solved problem. In recent years, in order to break through the limitation of low-frequency vibration isolation of traditional vibration isolation technology, the vibration isolation technology derived from the bandgap characteristics of phononic crystals has received extensive attention, which shows more advantages, such as vibration isolation frequency bandwi...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an active and passive controllable vibration isolation device based on piezoelectric phononic crystals in order to solve the vibration isolation problem under complex working conditions and low frequency conditions

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