Magnetostrictive Composite Cantilever Actuated by Terfenol-d Flakes

Abstract

The invention discloses a magnetostrictive composite cantilever beam driven by Terfenol-D sheets. A magnetic conductive housing, a magnetic conductive end cover and a non-magnetic-conductive coil framework are in circular axisymmetric structures, wherein one end of the magnetic conductive housing is sealed, and the other end thereof is open; the magnetic conductive end cover is mounted at the open end of the magnetic conductive housing; the non-magnetic-conductive coil framework is arranged in the magnetic conductive housing; the magnetic conductive end cover and the non-magnetic-conductive coil framework are provided with center shaft holes; a straight non-magnetic-conductive elastic substrate is arranged in a central axis of the center shaft hole of the non-magnetic-conductive coil framework; one end of the straight non-magnetic-conductive elastic substrate is fixed at the end part of the magnetic conductive housing, and the other end thereof penetrates through the center shaft hole of the magnetic conductive end cover and is a free cantilever; and the Terfenol-D sheets are bonded with the non-magnetic-conductive elastic substrate at intervals. Compared with the existing cantilever beams driven by a piezoelectric material, a Galfenol alloy and a giant magnetostrictive film, the magnetostrictive composite cantilever beam driven by the Terfenol-D sheets is higher in power density, large in output deformation, and high in response speed, can be applied to the fields requiring larger power, such as vibration active control, precise driving mechanisms, and light reflection.

Description

technical field [0001] The invention relates to a magnetostrictive composite cantilever beam, in particular to a magnetostrictive composite cantilever beam driven by a Terfenol-D sheet. Background technique [0002] Composite cantilever beam is a device composed of functional materials and elastic substrates, which can be applied in the fields of active vibration control, precision drive mechanism, force sensing, light reflection and so on. At present, composite cantilever beams mainly use piezoelectric materials, Galfenol alloys and giant magnetostrictive films as driving functional materials, but piezoelectric materials, Galfenol alloys and giant magnetostrictive films are small in deformation and low in power density, which limits their use The use of high power occasions. [0003] Terfenol-D, a rare earth giant magnetostrictive material, is widely used in sonar systems, high-power ultrasonic devices, precision control systems, various valves, drives, etc. It is a rare e...

AI Technical Summary

Problems solved by technology

At present, composite cantilever beams mainly use piezoelectric materials, Galfenol alloys and giant magnetostrictive films as driving functional materials, but piezoelectric materials, Galfenol alloys and giant magnetostrictive films are small in deformation and low in power density, which limits their use Use in high power occasions

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