A piezoelectric intelligent dynamic shock absorber

Abstract

The embodiment of the invention discloses a piezoelectric intelligent dynamic vibration absorber, which relates to the field of low-frequency vibration and noise control and utilization, and can reduce vibration in multiple directions and its own characteristic parameters are adjustable. The invention comprises: a piezoelectric spring (3) and a mass block (4) constitute a piezoelectric dynamic vibration absorber structure, and a control system (5) is connected with piezoelectric elements in the piezoelectric dynamic vibration absorber structure; The device (2) is used to connect the basic structure (1) and the structure of the piezoelectric dynamic shock absorber, and the coupling (2) and the basic structure (1) are fastened and fixed by bolts; the piezoelectric spring (3) is composed of a spring structure Composed of the piezoelectric element; the piezoelectric element is used to change the equivalent stiffness of the spring structure and the equivalent damping in the telescopic oscillation process; the control system (5) has a self-power supply function, by controlling the piezoelectric The voltage across the element changes the equivalent stiffness and damping of the piezoelectric spring. The invention is suitable for 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 reduce the performance and reliability of the machine or the main structure itself, or affect the performance and reliability of the equipment with the main structure as the platform. Therefore, most of the above-mentioned mechanical vibrations need to be eliminated or suppressed. Among many vibration reduction methods, dynamic vibration absorber has the characteristics of low cost and good effect, so it has been widely researched and used. The basic working principle of the dynamic vibration absorber is to add a sub-oscillation system with mass, damping and stiffness, that is, a vibration absorber, to a specific part of the controlled main vibration system, and then change the vibration of the main system by reasonably se...

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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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