An energy-feeding magnetorheological elastomer vehicle vibration damping device and its control method

Abstract

The invention discloses an energy feeding magnetorheological elastomer vehicle vibration reducing device. The device comprises a vibration reducing device body and a vibration reducing device controller; the vibration reducing device body includes a cylinder barrel, a piston rod, an upper spring clamping base, an upper spring pressing plate, an upper force transfer spring, a lower spring clamping base, a lower spring pressing plate and a lower force transfer spring; multiple piezoelectric modules and multiple magnetorheological elastomers coat the middle part of the piston rod; the adjacent piezoelectric modules and magnetorheological elastomers are bonded through double-surface adhesive thin iron plates; magnetic conducting brackets are bonded on the double-surface adhesive thin iron plates, and are wound with magnet exciting coils; piezoelectric vibrators are inlaid in the piezoelectric modules; the top of the upper spring clamping base is connected with a support frame; the top of the support frame is connected with an upper lifting ring; and the bottom of the cylinder barrel is fixedly connected with a lower lifting ring. The invention further discloses a control method of the energy feeding magnetorheological elastomer vehicle vibration reducing device. The energy feeding magnetorheological elastomer vehicle vibration reducing device is convenient to realize, low in cost, high in working stability and reliability, excellent in energy feeding effect, excellent in vibration reducing performance and strong in practicability.

Description

technical field [0001] The invention belongs to the technical field of vehicle vibration damping devices, and in particular relates to an energy-feeding magnetorheological elastomer vehicle vibration damping device and a control method thereof. Background technique [0002] Magnetorheological fluid is a kind of smart material, which can change from a free-flowing liquid to a semi-solid in an instant (milliseconds) under the action of an external magnetic field, showing a controllable yield strength, and the change is reversible. Compared with conventional dampers, the damper with liquid as the working fluid has excellent characteristics such as simple structure, continuously adjustable output damping force, wide dynamic range, fast response speed, and convenient combination with computer control. It has been widely used in vibration control fields such as transportation, engineering construction, aerospace and automatic weapon systems, and has achieved good control effects. ...

AI Technical Summary

Problems solved by technology

[0004] The Chinese patent application number 201510213495.0 discloses an intelligent magnetorheological elastomer shock absorber, which is mainly composed of an insulating shell, a shock absorber, an upper conductive voltage plate, a lower conductive voltage plate, piezoelectric ceramics, a magnetic conductive bracket, a coil, and an upper permanent It is composed of magnet, lower permanent magnet and magnetorheological elastomer. The piezoelectric ceramic is installed between the upper conductive voltage plate and the lower conductive voltage plate to realize energy feeding. The coil is installed in the annular groove on the outer wall of the magnetic conductive bracket to generate The magnetorheological elastomer controls the required magnetic field. The magnetorheological elastomer is located between the upper permanent magnet and the lower permanent magnet to generate a pre-tightening elastic force. Although it can also achieve the purpose of energy feeding and vibration reduction, on the one hand There is only one piece of magnetorheological elastomer and its shape is cylindrical, so the vibration damping deformation is not obvious. Although the magnetic permeable bracket is added, it cannot better provide the required damping force under the condition of large controllable damping force. On the other hand, because there is only one layer of piezoelectric material, the feed energy is limited, and the required electric energy may not be met, which greatly affects its vibration reduction effect. In addition, the control aspect has not yet been involved.

[0005] In the prior art, there is still a lack of energy-feeding magnetorheological elastomer vehicle vibration damping devices with compact structure, high working stability and reliability, high energy-feeding efficiency, and effective vibration reduction

Moreover, the control method of the energy-feeding magnetorheological elastomer vehicle vibration damping device in the prior art still needs to be improved, and it is not possible to make the energy-feeding magnetorheological elastomer vehicle vibration damping device in the best damping state

Images