WO2015099308A1

WO2015099308A1 - Device for reducing vibrations by using magnet

Info

Publication number: WO2015099308A1
Application number: PCT/KR2014/011722
Authority: WO
Inventors: 김대관; 최홍택
Original assignee: 한국항공우주연구원
Priority date: 2013-12-23
Filing date: 2014-12-02
Publication date: 2015-07-02
Also published as: JP2017502227A; JP6254707B2; KR101384140B1

Abstract

The present invention relates to a device for reducing vibrations by using a magnet, and the device is provided between a vibration source and a structure spaced in the z direction on the basis of a three-dimensional xyz coordinate system so as to support the vibration source and to attenuate the vibrations of the vibration source by using a repulsive force of the magnet.

Description

Vibration reduction device using magnet

The present invention relates to a vibration reduction device formed between a vibration source and a structure, and more particularly, to a vibration reduction device that attenuates vibration of a vibration source by using a repulsive force of a magnet.

Satellites are made by several systems. Above all, the attitude and orbit control system directs and stabilizes the satellite in a desired direction during the mission against disturbance factors affecting the attitude and orbit of the satellite. Various sensors are used to detect posture errors caused by external disturbances, and advanced devices and techniques are used according to the requirements of accuracy.

The attitude information of the satellite is measured and predicted by using various sensors, and the detected attitude information is compared with the desired value, and when there is a difference, the driver moves and corrects the error.

When directing or maintaining the satellite in a desired posture, a driver such as a reaction wheel is used, and high frequency micro vibrations are generated by this vibration source. Since high frequency microvibration acts as one of the major factors that degrade the directivity stability of satellites and the performance of various systems, a vibration controller is used to reduce the microvibration in high resolution satellites.

In general, vibration controllers can be classified into passive, active and semi-active controllers.

The active reduction device is a device for reducing vibration by using an active element and uses an appropriate control method according to the frequency range and system characteristics to be blocked. In this case, the active abatement device has a problem in that the design is to be redone if there is a change in the design information and the object to be blocked.

Manual abatement is a method of dispersing energy generated from vibration sources. The passive abatement device is easy to implement, and when the frequency to be reduced is determined, the vibration abatement property in the high frequency range is excellent and the functional reliability is excellent, and it is widely used as a vibration source abatement device of satellites.

In general, the vibration controller uses a lot of elastomer as a vibration damping material. A vibration controller is provided between the vibration source and the structure, so that vibration generated from the vibration source is attenuated by an elastomer, which is an elastic body, so as not to reach the structure.

Korean Patent Laid-Open Publication No. 2008-0085180 ("Elastomer-based modular multi-axis vibration / shock blocker", 2008.09.23) describes a vibration reduction device using an elastomer.

In general, the vibration reduction device requires a gravity-free device for forming the same conditions as in the outer space during the vibration experiment. In the vibration reduction device using an elastomer, the elastomer simultaneously performs a function of reducing vibration and supporting a vibration source during a vibration experiment.

Elastomers have a problem in that deformation occurs due to a constant vibration source load, and a problem in which the performance of the elastomer is degraded or broken when a large shock is applied or the vibration experiment is continued for a long time. In addition, the permanent deformation of the elastomer may occur even when the vibration reducing device is stored, and when the vibration experiment is performed using the modified elastomer or used in the satellite, the vibration reducing device does not perform its function and thus degrades the performance of the satellite. .

The present invention has been made to solve the above problems, an object of the present invention is to form a vibration reducing device using the repulsive force of the magnet, to reduce the probability of damage and deformation of the equipment caused by the vibration of the vibration source to reduce the To provide

Another object of the present invention is to provide a vibration reducing device that can control the distortion of the central axis (working shaft) generated during the vibration damping operation by using a magnet having a bent portion without additional adjustment work.

Vibration reducing device using a magnet of the present invention is provided between the vibration source 600 and the structure 700 spaced in the z direction, based on the three-dimensional xyz coordinate system, the vibration of the vibration source 600 by using a magnet In the vibration reducing device 100 for damping the present invention, the present invention is formed on an xy plane, and the support 200 is coupled to the vibration source 600 toward the structure 700 in the z direction of the vibration source 600. And a first magnet 210 formed on an outer surface of the end portion of the support 200; and an inner portion of the support magnet 200 formed to surround the support 200, and the vibration source in the z-direction of the structure 700. Body 300 is coupled to the structure 700 of the (600) side; And a second magnet 310 formed on the inner surface of the body 300 so as to correspond to the first magnet 210. The repulsive force of the first magnet 210 and the second magnet 310 is included. To damp the vibrations.

In the vibration reduction device 100 using the magnet, all outer surfaces of the first magnet 210 and the second magnet 310 are made of the same pole.

The vibration reduction device 100 using the magnet is formed by bending the first magnet 210 inwardly and bending the second magnet 310 to correspond to the first magnet 210. .

Vibration reduction device 100 using the magnet, the elastomer 400 is further provided between the support 200 and the body 300.

The support 200 is formed with a separation portion to enable separation and coupling on the support 200.

The vibration reduction device 100 using the magnet, the module 150 is separated through the separation unit is formed, the module 150 can be coupled to the support 200 in various directions.

The vibration reducing device of the present invention supports the load of the vibration source by using the repulsive force between the magnets and attenuates the vibration, thus eliminating the need for a zero gravity device during the vibration experiment on the ground, and the deformation and breakage caused by the load and vibration in the vibration of the vibration source There is an effect of reducing the risk of.

In addition, the vibration reduction device of the present invention is made so that the magnitude of the repulsive force generated between the support and the body are all the same, it is possible to maintain a constant central axis (operation axis) of the vibration source without additional adjustment work after the vibration attenuation center There is an effect of preventing the attitude control error of the satellite due to the distortion of the axis (operation axis).

1 is a perspective view of a vibration reducing device according to the present invention

2 is a layout view of a vibration reducing device according to the present invention

3 is a perspective view of a vibration reducing device module according to the present invention

Figure 4 is a vibration reduction device module according to a first embodiment of the present invention

5 is a vibration reduction device module according to a second embodiment of the present invention

6 shows several embodiments of the elastomer of the present invention.

Figure 7 is another embodiment of the fastening method of the vibration reducing device of the present invention

100: vibration reduction device 150 of the present invention: vibration reduction device module

200: support 210: first magnet

300: body 310: second magnet

400: elastomer

600: vibration source

700: Structure

Hereinafter, the technical spirit of the present invention will be described in more detail with reference to the accompanying drawings.

The accompanying drawings are only examples to illustrate the technical idea of the present invention in more detail, and thus the technical idea of the present invention is not limited to the forms of the accompanying drawings.

1 is a perspective view of a vibration reducing device according to the present invention.

Vibration reduction device 100 using a magnet of the present invention is provided between the vibration source 600 and the structure 700 is spaced in the z direction based on the three-dimensional xyz coordinate system and the vibration source 600 by using the repulsive force of the magnet Damping vibration).

In more detail, the vibration reduction window using the magnet of the present invention is formed on one side of the support 200, and the other side of the support 200 is in the z-direction structure 700 side of the vibration source 600. The vibration source 600 is coupled, and the body 300 is coupled to the structure 700 toward the vibration source 600 in the z direction of the structure 700.

On the other hand, the support 200 is formed on the xy plane and the separation portion is formed on the support 200 can be separated and combined from the support 200, the portion separated from the support 200 to reduce vibration Called device module 150.

2 is a layout view of a vibration reducing device 100 according to the present invention.

The vibration of the vibration source 600 may occur in all directions of the x-axis, y-axis, and z-axis, and the vibration may occur in several directions at the same time.

For example, assuming that the vibration of the vibration source 600 occurs in the x-axis and y-axis directions, when the module 150 is disposed only in the x-axis direction, the y-axis is easy to support the vibration of the x-axis. There is a limitation that it is difficult to support the vibration generated.

Therefore, as shown in Figures 2a and 2b, the module 150 is provided with at least three on the xy plane, disposed radially to stably support the vibration source 600 to attenuate vibration.

The module 150 is provided with a suitable number according to the requirements, such as the size, weight and moment of inertia of the vibration source 600.

In the present invention, since the vibration source 600 and the structure 700 are formed to be spaced apart in the vertical direction, in the present invention, the vertical direction is referred to as the z direction for convenience and the present invention is described as being coupled in the z direction.

However, since the vibration source 600 and the structure 700 are not necessarily spaced apart in the vertical direction, the vibration source 600 and the structure 700 are not necessarily in the z direction, and the vibration source 600 and the structure 700 are rotated through the xyz coordinate system. It will be described that may be provided in several directions.

For example, when the vibration source 600 and the structure 700 are spaced apart from the left and right directions, the present invention may refer to the z direction by rotating the xyz coordinate system.

3 is a perspective view of a vibration reducing device module 150 according to the present invention. 4A is a cross-sectional view taken along line AA ′ of the vibration reduction device 100 module 150 according to the first embodiment of the present invention, and FIG. 4B is a cross-sectional view taken along line BB ′.

As shown in Figure 3 and 4, the vibration reducing device 100 of the present invention comprises a support 200, the first magnet 210, the body 300, the second magnet 310.

The support 200 is formed on the xy plane, the first magnet 210 is formed on the outer surface of the end portion of the support 200. The body 300 is formed inside the hollow to surround the support 200, the second magnet 310 is formed on the inner surface of the body 300 to correspond to the first magnet 210. .

4 (a) and 4 (b), the first magnet 210 is provided on the entire outer surface of the support 200, the second magnet 310 is the first magnet It is formed on the entire inner surface of the body 300 to correspond to (210).

5 is a cross-sectional view of the vibration reduction device module 150 according to the second embodiment of the present invention.

As shown in FIG. 5, unlike the first embodiment, the vibration reducing device 100 according to the second embodiment of the present invention is formed by bending the first magnet 210 and the second magnet 310. . In more detail, the first magnet 210 is bent inwardly and the second magnet 310 is bent inwardly to correspond to the first magnet 210. In FIG. 5, the first magnet 210 is bent inward, but on the contrary, the first magnet 210 is bent outward and the second magnet 310 is formed in the first magnet 210. It may be formed to be bent in the outward direction to correspond to.

Since the central axis (operation axis) of the vibration source 600 in space orbit affects the attitude control of the satellite, it is very important that the vibration source 600 maintains a constant central axis (operation axis) even after vibration attenuation. . In the vibration reducing device 100 of the present invention, after the vibration damping operation, the bending portion formed on the first magnet 210 and the second magnet 310 has a strong property to return to the original reference position between the corresponding bending portions. In this case, the center axis (operation shaft) of the deformed vibration source 600 can be returned to the center more quickly. Therefore, since the central axis (operation shaft) of the vibration source 600 is maintained at a constant position quickly and accurately, there is an effect of reducing the error that can occur during attitude control of the satellite.

As described above, since the vibration reducing device 100 of the present invention attenuates the vibration of the vibration source 600 using the repulsive force, the first magnet 210 and the second magnet 310 are the vibration. It must be able to withstand the weight of the circle 600 and maintain a certain position.

Therefore, the first magnet 210 and the second magnet 310 is formed in a size appropriate to the need so as to sufficiently support the weight and the maximum impact load of the vibration source 600.

In addition, the vibration reduction device 100 of the present invention, while sufficiently supporting the load of the vibration source 600, and should easily attenuate vibration generated in the xyz axis all directions, the entire outer surface of the support 200 It is preferable that the first magnet 210 is provided. In addition, the inner side of the body 300 is formed so as to correspond to the outer shape of the support 200, the second magnet 310 to the inner side of the body 300 so as to correspond to the first magnet (210). It is preferred to be provided.

On the other hand, the first magnet 210 and the second magnet 310 is all the outer surface is made of the same pole. For example, the first magnet 210 formed on the side of the support 200 and the second magnet 310 corresponding thereto are N poles, and the first magnet formed on the upper surface of the support 200 ( When 210 and the second magnet 310 corresponding thereto are made of S poles, attraction between the support 200 and the body 300 may occur, and thus the vibration damping performance of the vibration source 600 may be degraded. In addition, a phenomenon in which the central axis (operation shaft) of the vibration source 600 is distorted may occur. Therefore, it is preferable that both the outer surfaces of the first magnet 210 and the second magnet 310 are N poles or S poles.

Since all outer surfaces of the first magnet 210 and the second magnet 310 are made of the same pole, the magnitude of the repulsive force generated by the first magnet 210 and the second magnet 310 are the same. That is, the interval between the support 200 and the body 300 is made the same in any position, the operation for vibration attenuation by the repulsive force generated by the first magnet 210 and the second magnet 310 After that, you can maintain a certain distance without any adjustment. Therefore, the structure 700 and the central axis (operation shaft) of the vibration can be easily maintained.

Since the conventional vibration reduction device uses only an elastomer as a material for damping vibration, a gravity-free device for creating an environment similar to a space environment is required to perform vibration experiments on the ground. However, the vibration reducing device 100 of the present invention can maintain a condition similar to the zero gravity condition by using the repulsive force generated by the first magnet 210 and the second magnet 310, without using a zero gravity device The experiment can be easily performed. In addition, when the vibration reduction device 100 of the present invention is provided between the vibration source 600 and the structure 700, there is no deformation and damage caused by the load of the vibration source 600, so that it can be easily stored for a long time. There is an advantage.

In addition, the vibration reduction device 100 of the present invention is formed such that the body 300 and the support 200 are opened at a predetermined interval by the repulsive force. That is, since the body 300 and the support 200 are non-adhesively coupled, there is an advantage that there is no deformation or damage due to the dropping or impact load of the adhesive part.

6 is a cross-sectional view of various embodiments of the elastomer provided in the vibration reducing device of the present invention.

As shown in Figure 6, the vibration reduction device 100 of the present invention is further provided with an elastomer 400 for connecting the body 300 and the support 200.

As shown in Figure 6 (a), the elastomer 400 is provided at the vertex or the corner portion of the support 200, the support 200 that can occur due to vibration or more than the rated load in the vibration source 600 ) And the damage caused by the collision between the body 300 is effective.

6 (b) and 6 (c), the elastomer 400 is formed to connect the outer surface of the support 200 and the inner surface of the body 300 is the vibration source ( Damping the vibration of 600 more easily, increasing the damping effect.

Vibration reduction device 100 of the present invention is made by using the repulsive force of the first magnet 210 and the second magnet 310 to reduce the support and vibration of the vibration source 600, the elastomer 400 The secondary role of limiting the movement of the support 200 when the vibration of the vibration source 600 is attenuated.

The elastomer 400 is not limited to the shape shown in the drawing, and is designed to be appropriately designed according to the magnitude of the vibration of the vibration source 600 and is formed in various shapes.

7 is a view showing another embodiment of the fastening method of the vibration reducing device 100 of the present invention.

As shown in FIG. 7, the module 150 and the support 200 may be fastened to be perpendicular to each other. Alternatively, the module 150 may be rotated by a predetermined angle to be coupled to the support 200 to maintain a predetermined angle. The module 150 is not limited to the above embodiment and may be fastened to the support 200 in various directions and in various ways.

The present invention is not limited to the above-described embodiments, and the scope of application is not limited, and various modifications can be made without departing from the gist of the present invention as claimed in the claims.

Claims

Based on the three-dimensional xyz coordinate system, provided between the vibration source 600 and the structure 700 spaced in the z direction, to the vibration reduction device 100 to damp the vibration of the vibration source 600 by using a magnet In

a support (200) formed on an xy plane and coupled to the vibration source (600) toward the structure (700) in the z direction of the vibration source (600);

A first magnet 210 formed on an outer surface of the end of the support 200;

A body 300 formed inside to surround the support 200 and coupled to the structure 700 toward the vibration source 600 in the z-direction of the structure 700; And

A second magnet 310 formed on an inner surface of the body 300 to correspond to the first magnet 210;

It is made, including, the vibration reduction device 100 using a magnet to damp the vibration by using the repulsive force of the first magnet 210 and the second magnet (310).
The method of claim 1,

Vibration reducing device 100 using the magnet,

Vibration reduction device 100 using a magnet made of the same pole all the outer surface of the first magnet 210 and the second magnet 310.
The method of claim 1,

Vibration reducing device 100 using the magnet,

The first magnet 210 is formed to be bent inwardly, the second magnet 310 is a vibration reduction device using a magnet is formed to be bent to correspond to the first magnet (210).
The method of claim 1,

Vibration reducing device 100 using the magnet,

Vibration reduction device using a magnet further provided with an elastomer 400 between the support (200) and the body (300).
The method of claim 1,

The support 200,

Vibration reduction device 100 using a magnet is formed to be separated on the support 200 to be separated and coupled.
The method of claim 5,

Vibration reducing device 100 using the magnet,

Module 150 is separated through the separation unit is formed, the module 150 is a vibration reduction device using a magnet that can be coupled to the support 200 in various directions (100).