Self-powered vehicle vibration damping device and control method therefor

Abstract

The invention discloses a self-powered vehicle vibration damping device which comprises a vibration damping device body and a vibration damping device controller, wherein the vibration damping device body comprises a first cylinder body, a piston rod, a piezoelectric generating unit, a transmission force spring unit, a magneto-rheological damping unit and an electromagnetic induction unit; the piezoelectric generating unit comprises a plurality of piezoelectric modules, and a plurality of piezoelectric vibrators are inlaid in each piezoelectric module; the transmission force spring unit comprises an upper spring pressing plate, a lower spring pressing plate, a lower spring clamping seat, an upper spring clamping seat and a transmission force spring; the magneto-rheological damping unit comprises an outer cylinder, an inner cylinder, a permanent magnet protecting cover, an upper damp channel, a lower damp channel, a magnet exciting coil and a piston; and the electromagnetic induction unit comprises a leakage-proof magnetic sleeve, a second cylinder body, a permanent magnet and an electromagnetic induction coil. The invention further discloses a control method for the self-powered vehicle vibration damping device. The self-powered vehicle vibration damping device provided by the invention is high in energy-regenerative efficiency, good in work stability, high in reliability, can adjust the damping force in real time, and ensures that a vehicle is in an optimal vibration damping state.

Description

technical field [0001] The invention belongs to the technical field of vehicle vibration damping devices, and in particular relates to a self-powered vehicle vibration damping device and a control method thereof. Background technique [0002] Magnetorheological fluid is an ideal intelligent material, which can change from a well-flowing liquid to a viscous fluid in a short time under the action of a magnetic field. It has certain yield characteristics, and its yield strength increases with the increase of the magnetic field intensity. The magnetorheological damper manufactured by using this characteristic of magnetorheological fluid has the advantages of wide range of damping characteristics and easy control under the action of an external magnetic field. With a certain control strategy, the magnetorheological damper can become An ideal semi-active control damper with excellent performance, compared with the existing damper, can achieve the purpose of controlling the damping...

AI Technical Summary

Problems solved by technology

However, it is still a semi-active control device, which needs to consume a part of energy, which limits the promotion of magnetorheological dampers. In order to solve this problem, someone proposed a self-powered magnetorheological damper. Although the structure is a bit simple, However, there are defects such as slow response, poor reliability, high energy consumption, insufficient real-time damping force, and limited self-supply energy.

[0004] For example, the Chinese invention patent with application number 201310471102.7 discloses a self-powered electromagnetic rheological damper. The self-powered damper mainly includes a cylinder, a positioning cylinder, a compensation unit, an air-core coil, and a permanent magnet. The compensation unit is arranged on the positioning cylinder. Inside, the hollow coil is set in the lower cavity of the positioning cylinder, and the permanent magnet is set in the inner cavity of the hollow coil and fixed with the compensation unit. On the one hand, due to the hysteresis of the compensation unit, when the piston reciprocates, the compensation unit drives the permanent magnet The reciprocating motion in the inner cavity of the hollow coil converts mechanical energy into electrical energy, which is not only unstable but also unable to meet the energy demand of the damper itself. On the other hand, the magnetic field generated by the permanent magnet cutting the magnetic induction line has an interference effect on the magnetorheological fluid. At the same time, the magnetic field path passed by the magnetorheological fluid flow type designed by it is relatively short, which cannot better provide the effective magnetic field required for its function. For example, the Chinese invention patent application with application number 200910103744.5 discloses a self-supplied electromagnetic rheology Damper, when the damper moves, the magnetorheological fluid scours the multiple blades to convert the linear motion into the rotation of the butterfly rotor, thereby changing the magnetic flux of the coil on the butterfly rotor, that is, the change of the magnetic field intensity, and realizing the transfer of mechanical energy to electrical energy. However, the blades of this structure must be processed into a special shape, which is complicated to process. At the same time, due to the environment, the size of the centrifugal force is limited, resulting in a limited blade speed and low energy conversion efficiency. The demand for electric energy, the utilization rate of the magnetic field generated by its excitation coil is limited

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