Piezoelectric intelligent dynamic vibration absorber

Abstract

The embodiment of the invention discloses a piezoelectric intelligent dynamic vibration absorber, and relates to the field of low-frequency vibration noise control and utilization. Vibration can be reduced in multiple directions, and own characteristic parameters can be adjusted. The piezoelectric intelligent dynamic vibration absorber comprises a piezoelectric dynamic vibration absorber structurecomposed of a piezoelectric spring (3) and a mass block (4), a control system (5) is connected with a piezoelectric element in the piezoelectric dynamic vibration absorber structure; a basic structure (1) is connected with the piezoelectric dynamic vibration absorber structure through a coupling (2), the coupling (2) and the basic structure (1) are fastened and fixed with bolts; the piezoelectricspring (3) is composed of a spring structure and the piezoelectric element; the piezoelectric element is used for changing the equivalent stiffness of the spring structure and the equivalent dampingduring expansion-and-contraction oscillation; and the control system (5) is provided with a self-powered function, and the equivalent stiffness and damping of the piezoelectric spring are changed by controlling voltage at two ends of the piezoelectric element. The piezoelectric intelligent dynamic vibration absorber is applicable to the field of low-frequency vibration noise control and utilization.

Description

Technical field [0001] The invention relates to the field of low-frequency vibration and noise control and utilization, in particular to a piezoelectric intelligent dynamic vibration absorber. Background technique [0002] Mechanical vibration is likely to cause the performance and reliability of the machine or the main structure itself to decrease, or to affect the performance and reliability of the equipment using the main structure as a platform. Therefore, most of the above-mentioned mechanical vibrations need to be eliminated or suppressed. Among many vibration reduction methods, the dynamic vibration absorber has the characteristics of low cost and good effect, so it is widely researched and used. The basic working principle of the dynamic vibration absorber is to add a sub-oscillation system with mass, damping and rigidity to a specific part of the controlled main vibration system, that is, the vibration absorber, and change the vibration status of the main system by selec...

AI Technical Summary

Problems solved by technology

[0003] However, in the actual engineering application process, once the structure of the dynamic vibration absorber is designed and processed, its characteristic parameters are difficult to adjust in real time. If the vibration frequency of the main system changes due to changes in the environment or its own structure, the dynamic vibration absorber will not be able to obtain the ideal in time. Vibration reduction effect

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