Structural vibration and noise control device based on piezoelectric energy recovery

Abstract

The invention discloses a structural vibration and noise control device based on piezoelectric energy recovery, comprising a piezoelectric energy unit, a piezoelectricity sensing unit and a system circuit; wherein, a piezoelectric energy unit is composed of at least one first piezoelectric element which is stuck to the surface of a controlled structure and the piezoelectricity sensing unit is composed of at least one second piezoelectric element which is stuck to the surface of a controlled structure; the system circuit is composed of an energy recovery interface circuit unit, a maximum detecting unit, an initial charging circuit, a power management and an energy storage unit. The structural vibration and noise control device based on piezoelectric energy recovery of the invention uses the SSH energy recovery technology, recovers the energy from the piezoelectric patches which are stuck to the structure and provides energy for a low power control circuit (the power consumption of the control circuit is only 0.201mW); the invention is used to control the switch on the control device without external energy and enjoys simple structure, small volume and perfect robustness, thus having a wide application on structural vibration and noise control.

Description

1. Technical field [0001] The invention relates to a structure vibration and noise control device, in particular to a device for controlling structure vibration and noise by recovering energy from a piezoelectric element. 2. Background technology [0002] The high-frequency response characteristics and electromechanical coupling characteristics of piezoelectric materials make them widely used in the intelligentization of structures and vibration and noise control. In recent years, a lot of research has been done on various control methods. Among them, the active method and the passive method have been studied more, and the theory is more mature. Although active control has a good control effect, it generally requires signal processing systems such as sensors, drivers, power amplifiers, and external devices such as power amplifiers. Not only is the cost high, but the system is relatively large and complex, which reduces the reliability of the system and is difficult to achie...

AI Technical Summary

Problems solved by technology

Passive control is relatively simple and easy to implement, but the disadvantage is that the inductance and resistance parameters in the branch circuit have poor adaptability to environmental changes, and often require large inductance for low-frequency vibrations. Although operational amplifiers can be used to form large inductance, the operation The amplifier needs power supply, that is, it needs external power supply, so its versatility is greatly limited

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