A 3D Electromagnetic Vibration Isolator Based on Bidirectional Displacement Amplification Function Design

Abstract

The invention discloses a three-dimensional electromagnetic vibration isolator designed based on a two-way displacement amplification function. The three-dimensional electromagnetic vibration isolatorcomprises a sand-glass-shaped mechanism, a rhombus mechanism, electromagnetic mechanisms, a sensor, a fastener and other parts. The sand-glass-shaped mechanism and the rhombus mechanism are mutuallyperpendicularly distributed, and the four same electromagnetic mechanisms are distributed on the middle plates of the two mechanisms. Each electromagnetic mechanism is divided into a permanent magnetpart and an electromagnet part. The sensor is arranged in the middle crossed portion, and the whole vibration isolator can be connected to a needed vibration isolation environment through bolts. By means of the negative poisson ratio effect of the sand-glass-shaped mechanism and the positive poisson ratio effect of the rhombus mechanism, the two mechanisms are in two opposite driving directions, and a complementary displacement amplification effect is achieved. Meanwhile, the electromagnetic mechanisms have the characteristic that the shorter the distance is, the larger electromagnetic force is. By means of the three-dimensional structure design of the sand-glass-shaped mechanism and the rhombus mechanism which are mutually perpendicularly distributed, the bad mode of a traditional displacement amplification mechanism in the non-acting direction is eliminated.

Description

technical field [0001] The invention belongs to the technical field of vibration control, and mainly relates to an electromagnetic vibration isolator, specifically a three-dimensional electromagnetic vibration isolator designed based on a bidirectional displacement amplification function. Background technique [0002] With the development of new technologies and materials and the continuous improvement of people's requirements for vibration control, vibration isolation technology has also been continuously developed. While traditional electromagnetic, hydraulic and pneumatic actuators are widely used in engineering, intelligent structures are gradually being applied to aerospace and other fields as technology and technology continue to mature. Because it is difficult for the spacecraft to replenish air or liquid in space, it brings certain difficulties to the use of pneumatic or hydraulic actuators. Electric energy can be supplied by solar panels for a long time. Therefore,...

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Problems solved by technology

Although the hourglass type electromagnetic vibration isolator adopts the displacement amplification effect and has the advantage of reducing the control current, our in-depth research found that the hourglass type electromagnetic vibration isolator can only perform efficient vibration isolation in a single direction, not in the reciprocating direction of vibration. Both can make full use of the actuation characteristics that the smaller the electromagnetic pair distance is, the greater the electromagnetic force is, and it is prone to bad low-frequency modes in the non-actuating direction (left and right shaking), which still needs to be improved

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