阅读说明：本技术 一种磁场驱动双稳态结构及其制作方法 (Magnetic field driven bistable structure and manufacturing method thereof ) 是由 张征 周一松 孙敏 李毅 柴灏 李吉泉 吴化平 彭翔 于 2020-04-01 设计创作，主要内容包括：本发明公开了一种磁场驱动双稳态结构及其制作方法,一种磁场驱动双稳态结构,包括双稳态层合板、用于驱动双稳态层合板变形的磁敏变形驱动器,所述磁敏变形驱动器固定在双稳态层合板表面。本发明采用提供一种磁场驱动双稳态结构及其制作方法,响应速度快、结构简单、控制简单便于操作,且制作简单。(The invention discloses a magnetic field driving bistable structure and a manufacturing method thereof, and the magnetic field driving bistable structure comprises a bistable laminated plate and a magnetic sensitive deformation driver for driving the bistable laminated plate to deform, wherein the magnetic sensitive deformation driver is fixed on the surface of the bistable laminated plate. The magnetic field driving bistable structure and the manufacturing method thereof have the advantages of high response speed, simple structure, simple control, convenient operation and simple manufacturing.)

1. A magnetic field driven bistable structure is characterized by comprising a bistable state laminated plate (1) and a magnetic sensitive deformation driver (2) for driving the bistable state laminated plate (1) to deform, wherein the magnetic sensitive deformation driver (2) is fixed on the surface of the bistable state laminated plate (1).

2. A magnetic field driven bistable structure according to claim 1, wherein said bistable laminate (1) is bonded to said magneto-sensitive deformation actuator (2).

3. A magnetic field driven bistable structure according to claim 1, wherein said magnetosensitive deformation driver (2) is configured as a magnetorheological elastomer driver, said magnetorheological elastomer driver comprising a flexible substrate (201), and magnetic particles (202) for driving the flexible substrate to bend and deform under the action of an applied magnetic field.

4. A magnetic field driven bistable structure according to claim 3, wherein said magnetic particles (202) are distributed in a chain-like manner within the flexible matrix (201).

5. A magnetic field driven bistable structure according to claim 1, 2, 3 or 4, wherein the bistable laminate (1) comprises two layers of ply material, the ply material being laid orthogonally.

6. The magnetically actuated bistable structure of claim 5, wherein said ply material is provided as a T700 carbon fiber epoxy.

7. A manufacturing method of a magnetic field driven bistable structure is characterized by comprising the following steps:

the method comprises the following steps: orthogonally laying a layering material, and then heating and curing to finish the manufacture of the bistable state laminated plate (1);

step two: mixing a flexible matrix material with magnetic particles (202) to obtain a mixture, placing the mixture in a vacuum drying oven for vacuumizing, then placing the mixture in a sealed mould and curing under a uniform magnetic field to finish the manufacture of the magneto-dependent deformation driver (2);

step three: a magneto-dependent deformation actuator (2) is fixed to the bistable laminate (1).

8. The method according to claim 7, wherein in the second step, the flexible substrate is made of silicone rubber.

9. The method of claim 7, wherein in step two, the magnetic particles (202) are hard magnetic particles.

10. The method of claim 9, wherein the hard magnetic particles are selected from ru fe — b powders.

Technical Field

The invention relates to the technical field of intelligent deformable structures and composite materials, in particular to a magnetic field driven bistable structure and a manufacturing method thereof.

Background

Composite bistability refers to a structure that has two deformability and can maintain a stable state after deformation without continuous energy input. Due to the characteristics, the solar cell has great application potential in the fields of deformable wings, unfolding structures, unfoldable solar panels and the like. With the development of the aviation and aerospace industries, higher requirements are put on the deformation capability of the deformable structure. The intelligent driving mode of the bistable structure mainly uses shape memory alloy, piezoelectric material and the like at present. However, the existing driving method has a slow response speed and has a certain influence on the rigidity and curvature of the driving method, so that a new intelligent driving method for driving is needed to be provided.

For example, the invention of a "reconfigurable bistable device" disclosed in the chinese patent literature, having publication No. CN103035427B, comprising an elastically deformable plate laterally disposed between and connected to one or more mounting members, said one or more mounting members being directly or indirectly connected to opposite ends of said plate, said plate being held under a compressive force along at least one vector extending between said opposite ends, which deforms the plate into one of two stable deformed positions, is the use of shape memory alloys to deform bistable structures, having the drawback of slow response speed and of having a certain influence on the stiffness, curvature of the structure itself.

Disclosure of Invention

The invention provides a magnetic field driving bistable structure and a manufacturing method thereof, aiming at overcoming the problems that the response speed of the existing driving mode is slow and certain influence is caused on the rigidity and the curvature of the magnetic field driving bistable structure.

In order to achieve the purpose, the invention adopts the following technical scheme:

a magnetic field driven bistable structure includes a bistable laminate panel, a magnetically sensitive deformation actuator for driving deformation of the bistable laminate panel, the magnetically sensitive deformation actuator affixed to a surface of the bistable laminate panel.

In the technical scheme, the magnetic-sensing deformation driver is fixed outside the bistable state laminated plate, the structure is simple, the bistable state laminated plate has a bistable characteristic, namely the bistable state laminated plate has multiple stable forms, the form is maintained without external force, the magnetic-sensing deformation driver provides driving force for the deformation of the bistable state laminated plate, the magnetic-sensing deformation driver can be bent towards one side only by adding an external magnetic field, the bending moment generated by the bending of the magnetic-sensing deformation driver drives the bistable state laminated plate to be converted from one stable state to a second stable state, the control is simple, and the operation is convenient; and the magnetic sensitive deformation driver has better driving response capability and high driving speed.

Preferably, the bistable laminate is bonded to the magneto-sensitive deformation actuator.

The bonding positions of the magnetic sensitive deformation drivers on different bistable state laminated plates are different, and the bonding mode facilitates the connection between the bistable state laminated plates and the magnetic sensitive deformation drivers.

Preferably, the magneto-rheological deformation driver is set as a magneto-rheological elastomer driver, and the magneto-rheological elastomer driver comprises a flexible substrate and magnetic particles for driving the flexible substrate to bend and deform under the action of an external magnetic field.

The magneto-rheological elastomer driver has better driving response capability and high driving speed, can realize non-contact driving, and under the action of an external magnetic field, magnetic particles move so as to bend the flexible substrate, so that the driving force of the magneto-rheological deformation driver on the bistable laminated plate can be controlled by controlling the external magnetic field, and the driving force is easy to regulate and control.

Preferably, the magnetic particles are chain-like distributed within the flexible matrix.

When the magnetic particles are distributed in a chain shape, the magnetic particles move under the action of an external magnetic field, so that the flexible matrix is driven to bend, and the force applied to the magnetic particles is different according to the difference of the external magnetic field, so that the deformation degree of the flexible matrix can be controlled by controlling the external magnetic field.

Preferably, the bistable laminate comprises two layers of ply material, the ply material being laid orthogonally.

The orthogonal laying of the layering materials is beneficial to generating residual stress after heating and curing, so that the obtained bistable laminated plate has two stable states.

Preferably, the ply material is provided with T700 carbon fiber epoxy resin.

The bistable state laminated plate needs to be transformed between two stable states, and the T700 carbon fiber epoxy resin prepreg has good toughness, so that the bistable state laminated plate is not easy to break.

In order to realize the purpose of the invention, the adopted technical scheme is as follows: a manufacturing method of a magnetic field driven bistable structure comprises the following steps:

the method comprises the following steps: orthogonally paving a layering material, and heating and curing to complete the manufacture of the bistable state laminated plate;

step two: mixing a flexible matrix material with magnetic particles to obtain a mixture, placing the mixture in a vacuum drying oven for vacuumizing, then placing the mixture in a sealed mould and curing under a uniform magnetic field to finish the manufacture of the magneto-dependent deformation driver;

step three: a magnetically sensitive deformation actuator is secured to the bi-stable laminate.

In the step two, the flexible base material is a main body of the magnetic sensitive deformation driver, magnetic particles are distributed in a chain shape under the action of a magnetic field, in the step three, the magnetic sensitive deformation driver is fixed on the bistable state laminated plate, and the magnetic sensitive deformation driver bends to generate bending moment to generate driving force for the bistable state laminated plate, so that the bistable state laminated plate deforms.

Preferably, in the second step, the flexible base material is silicone rubber.

Compared with natural rubber and other synthetic rubbers, the silicon rubber has good viscoelasticity and high-temperature resistance, is softer, has simple manufacturing process and controllable curing time.

Preferably, in step two, the magnetic particles are hard magnetic particles.

The hard magnetic particles have high maximum energy product, namely, the hard magnetic particles have higher maximum magnetic energy density stored and available in unit volume of the permanent magnetic material, high coercive force, high residual magnetic flux density and large residual magnetization intensity, and in addition, the stability is also high.

Preferably, the hard magnetic particles are provided as ru fe — b magnetic powder.

The Ru ferroboron magnetic powder has better magnetism, is convenient for improving the performance of the magnetic variable elastomer driver, and has high cost performance.

Therefore, the invention has the following beneficial effects:

(1) the response speed is high, the structure is simple, the control is simple, the operation is convenient, and the manufacture is simple;

(2) the orthogonal laying of the layering materials is that the bistable laminated plate has two stable states;

(3) the magneto-rheological elastomer driver is adopted, so that the magneto-rheological elastomer driver has better driving response capability and high driving speed, non-contact driving can be realized, and the driving force is easy to regulate and control;

(4) the hard magnetic particles are set to be Ru iron boron magnetic powder, so that the performance of the magnetic variable elastomer driver is improved conveniently, and the cost performance is high.

Drawings

FIG. 1 is a schematic diagram of a magnetic field driven bistable structure;

FIG. 2 is a schematic diagram of a magneto-dependent deformation actuator;

FIG. 3 is an internal structure of a magnetic deformation-sensitive actuator without magnetic field;

FIG. 4 is an internal structure of a magneto-dependent deformation actuator made with a magnetic field;

FIG. 5 is a deformation diagram of a magneto-sensitive deformation actuator secured at one end;

FIG. 6 is a schematic diagram of a first placement position of a magnetic field driven bistable configuration magnetosensitive deformation actuator;

FIG. 7 is a schematic diagram of a second placement position of a magnetic field driven bistable configuration magnetosensitive deformation actuator;

FIG. 8 is a schematic diagram of a third placement position of a magnetic field driven bistable configuration magnetosensitive deformation actuator;

in the figure: 1. the bistable laminated plate comprises a bistable laminated plate 2, a magnetic sensitive deformation driver 201, a flexible substrate 202, magnetic particles 3, a mould 4 and an electromagnet.

Detailed Description

The invention is further described with reference to the following detailed description and accompanying drawings.