An Experimental Method for Piezoelectric Semi-active Vibration Control Based on Acceleration Detection

Abstract

The invention discloses an experimental method for piezoelectric semi-active vibration control based on acceleration detection. The experimental device includes a cuboid beam structure model and a control unit. The upper surface of the beam structure model is provided with a first vibrator and a first acceleration sensor. , the lower surface of the beam structure model is provided with a first piezoelectric sheet, the front of the beam structure model is provided with a second exciter and a second acceleration sensor, the back of the beam structure model is provided with a second piezoelectric sheet, the beam structure model One side is provided with a third exciter and a third acceleration sensor, and the other side of the beam structure model is provided with a third piezoelectric sheet; the control unit includes a microcontroller module, a signal conditioning circuit module, a voltage amplification circuit module and a voltage synchronization Switch damping circuit module. The experimental device of the invention is simple in structure, easy to implement, can enrich the experimental links, and can provide a good platform for the research of piezoelectric semi-active vibration control, has good use effect, and is easy to popularize and use.

Description

technical field [0001] The invention belongs to the technical field of vibration control, in particular to an experimental method of piezoelectric semi-active vibration control based on acceleration detection. Background technique [0002] Vibration phenomena widely exist in scientific research, industrial production and daily life, and with the rapid development of modern industry and science and technology, people's pursuit of various fields such as military defense, aerospace, precision machining, transportation vehicles and civil engineering is constantly improving. , the negative effects of vibration phenomena in the above fields are becoming more and more prominent, which are mainly reflected in two aspects: a serious impact on the functional characteristics of the structure and fatigue damage to the structure itself. The noise and vibration generated by urban rail transit after it is put into operation will more or less affect urban residents, houses in the city, surr...

AI Technical Summary

Problems solved by technology

Passive suppression technology is the earliest control technology, the system is the simplest and the stability is the best, but its control effect is limited; active suppression technology is developed with the development of computer technology, active control technology has good control effect, but the system is complex, It also consumes a lot of energy, and it is inconvenient to implement. Semi-active control is developed on the basis of passive control and active control. It is based on active control and passive control theory, forming a semi-active control method. Semi-active control is not the energy It is directly applied to the piezoelectric actuator to generate control force, but the energy is used in the semi-active control loop to change the characteristics of the system by controlling the parameters of the peripheral circuit, so as to achieve the effect of vibration control. In the prior art , in the course of the experiment, most of the cantilever beam experiment platform is built for the experiment simulation. During the experiment, because the control force and the control signal cannot follow in real time, the experiment effect has a certain delay and deviation, and it takes a long time, and the vibration suppression effect generally

Images