阅读说明：本技术 隔振装置和隔振方法 (Vibration isolation device and vibration isolation method ) 是由 黄维 支李峰 张欢 李朋波 谷晓梅 童宗鹏 于 2021-09-22 设计创作，主要内容包括：本申请实施例公开了一种隔振装置和隔振方法,包括隔振主体、电磁装置以及导体；所述隔振主体上设置有加速度传感器；所述电磁装置包括平行设置的第一磁体和第二磁体,所述第一磁体和所述第二磁体分别位于所述隔振主体的两侧,并相对设置,以产生匀强磁场；以及导体固定连接至所述隔振主体；所述导体位于所述匀强磁场中,且通电后的所述导体能够产生与激励力方向相反的电磁力,所述激励力为所述隔振主体作用在所述导体上的力；通过调整导体内的电压,可以调整电磁力的大小,以改变隔振装置的性能参数；因而在频率或频段变化的设备环境中,可以根据需要适应性地调整隔振装置,以保证隔振效果。(The embodiment of the application discloses a vibration isolation device and a vibration isolation method, wherein the vibration isolation device comprises a vibration isolation main body, an electromagnetic device and a conductor; an acceleration sensor is arranged on the vibration isolation main body; the electromagnetic device comprises a first magnet and a second magnet which are arranged in parallel, wherein the first magnet and the second magnet are respectively positioned on two sides of the vibration isolation main body and are oppositely arranged so as to generate a uniform magnetic field; and a conductor fixedly connected to the vibration isolation body; the conductor is positioned in the uniform magnetic field, and the electrified conductor can generate electromagnetic force in the direction opposite to that of excitation force, wherein the excitation force is the force of the vibration isolation body acting on the conductor; the electromagnetic force can be adjusted by adjusting the voltage in the conductor so as to change the performance parameters of the vibration isolation device; therefore, in the equipment environment with variable frequency or frequency band, the vibration isolation device can be adaptively adjusted according to the requirement to ensure the vibration isolation effect.)

1. A vibration isolation apparatus, comprising:

the vibration isolation device comprises a vibration isolation main body, a vibration isolation sensor and a vibration isolation sensor, wherein the vibration isolation main body is provided with an acceleration sensor;

the electromagnetic device comprises a first magnet and a second magnet which are arranged in parallel, wherein the first magnet and the second magnet are respectively positioned on two sides of the vibration isolation main body and are oppositely arranged so as to generate a uniform magnetic field; and

a conductor fixedly connected to the vibration isolation body; the conductor is positioned in the uniform magnetic field, and the electrified conductor can generate electromagnetic force in the direction opposite to that of excitation force, and the excitation force is the force acted on the conductor by the vibration isolation body.

2. The vibration isolation device according to claim 1, wherein the first magnet is a permanent magnet or an electromagnet, and the second magnet is a permanent magnet or an electromagnet;

wherein the magnetic poles of the first magnet and the second magnet are opposite.

3. The vibroisolating device according to claim 1, wherein said first magnet and said second magnet are both coils;

wherein the magnetic pole of the first magnet after being electrified is opposite to the magnetic pole of the second magnet after being electrified.

4. The vibroisolating device according to claim 1, characterized in that, a displacement sensor is provided on said conductor.

5. The vibration isolation device according to claim 1, wherein the vibration isolation body comprises

A first body to which the conductor is secured;

one end face of the upper connecting piece is fixed to the upper surface of the first main body, and the other end face of the upper connecting piece is detachably connected to an excitation source or the middle raft body; and

one end face of the lower connecting piece is fixed to the lower surface of the first main body, and the other end face of the lower connecting piece is detachably connected to the mounting base; the lower connecting piece is provided with the acceleration sensor.

6. The vibration isolation device of claim 5, wherein the first magnet and the second magnet are each fixed to the excitation source or the intermediate raft; or both the first magnet and the second magnet are fixed to the mounting base.

7. The vibration isolation apparatus according to claim 1, wherein the vibration isolation body comprises a first vibration isolation body and a second vibration isolation body, the first vibration isolation body and the second vibration isolation body being fixedly connected to two opposite surfaces of the conductor, respectively.

8. The vibration isolation device according to claim 7, wherein the materials of the first and second vibration isolation bodies are both rubber, and are respectively vulcanization-fixed to the opposite surfaces of the conductor.

9. The vibration isolation device according to claim 1, wherein a gap is left between the first magnet and the vibration isolation body, and a gap is left between the second magnet and the vibration isolation body.

10. A vibration isolation method applied to the vibration isolation apparatus according to any one of claims 1 to 9, comprising the steps of:

s100, presetting a target vibration reduction effect delta;

collecting an excitation signal of the vibration isolation main body;

carrying out Fourier transformation on the excitation signal to obtain a concerned frequency;

obtaining an initial displacement X of a conductor₀And an initial acceleration a of the vibration isolating body₀；

Acquiring an initial value of electromagnetic force generated by the conductor according to a product of the inherent stiffness of the vibration isolation body and the frequency of interest;

s200, acquiring voltage input into the conductor according to the following ampere force equation;

wherein U is the voltage input to the conductor, F_(t)Is an electromagnetic force, R₀Rho is the resistivity of the conductor, L is the length of the conductor in the current direction, h is the thickness of the conductor, a is the width of the conductor, B is the magnetic induction intensity of a uniform magnetic field, and t is the time;

s300, inputting the calculated voltage into the conductor, and acquiring the acceleration a of the vibration isolation body_t；

S400, when the acceleration a_tLess than the initial acceleration a₀And when the difference value of the target vibration attenuation effect delta is obtained, outputting the corresponding voltage U_(t)；

When the acceleration a is_tGreater than or equal to the initial acceleration a₀And when the difference value of the target vibration damping effect delta is obtained, the steps S200 to S400 are circulated;

s500, according to the output voltage U_(t)Controlling a voltage input to the conductor to cause the conductor to generate the electromagnetic force in a direction opposite to an excitation force.

11. The vibration isolation method according to claim 10, wherein in step S200, the voltage input to the conductor is obtained according to the following ampere force equation;

where U is the voltage input to the conductor, C is the economic coefficient, and F_(t)Is an electromagnetic force, R₀Rho is the resistivity of the conductor, L is the length of the conductor in the current direction, h is the thickness of the conductor, a is the width of the conductor, B is the magnetic induction intensity of the uniform magnetic field, and t is the time.

12. The vibration isolation method according to claim 11,

in step S200, the economic coefficient C is selected within N limited times;

the step S400 further includes the following steps:

s410, acquiring the acceleration a_tLess than the initial acceleration a₀First said acceleration a of difference from said target damping effect delta_t；

S420, acquiring the first acceleration a_tCorresponding economic coefficient C_tAnd marked as initial economic coefficient C_m；

S430, acquiring the acceleration a_tLess than the initial acceleration a₀The acceleration a of the difference from the target vibration damping effect δ_t；

S440, acquiring the acceleration a_tCorresponding economic coefficient C_tAnd is marked as the current economic coefficient C_n；

S450, when the current economic coefficient C_nLess than the initial economic coefficient C_mThe current economic coefficient C_nTransition to the initial economic coefficient C_m；

Otherwise, maintaining the initial economic coefficient C_m；

Looping the steps S410-S450 for N limited times and outputting the initial economic coefficient C_m；

S460, obtaining the initial economic coefficient C_mThe corresponding voltage U_(t)。

13. The vibration isolation method according to claim 12, wherein the economic coefficient C is selected according to an arithmetic progression.

14. The vibration isolation method according to claim 10, wherein in step S100, said fourier transforming the excitation signal to obtain the frequency of interest comprises:

the displacement signal of the conductor is expanded by Fourier transform as follows:

wherein A is_nIs the amplitude of the nth harmonic component,is the phase of the nth harmonic component, A₀Is an initial amplitude, n is a natural number, ω₁Is the angular frequency;

the expression for the frequency of interest is:

wherein x is₁，x₂，…，x_kIs the sum of the harmonic components and is,is the amplitude of the k-th harmonic component,is the phase of the kth harmonic component, A₀Is an initial amplitude, k is a natural number, ω₁Is the angular frequency.

Technical Field

The application relates to the field of vibration isolator equipment, in particular to a vibration isolation device and a vibration isolation method.

Background

Due to the excellent vibration isolation effect and strong environment adaptability of the rubber vibration absorber, the rubber vibration absorber is widely applied to the fields of automobiles, ships, aerospace and the like. Once the common rubber vibration isolator is designed and shaped, the relevant performance parameters of the common rubber vibration isolator are difficult to change; when the vibration damping device is installed on equipment needing vibration damping, the vibration damping effect is determined accordingly. Research at present discovers that traditional rubber vibration isolator all has certain vibration isolation effect at full frequency channel, but under fixed equipment environment, when frequency or frequency channel change, can't guarantee that rubber vibration isolator's vibration isolation effect satisfies the damping requirement all the time.

In the research and practice processes of the prior art, the inventor of the application finds that the vibration isolator with fixed performance parameters cannot ensure that the vibration isolation effect always meets the requirement in the equipment environment with variable frequency or frequency band.

Disclosure of Invention

The embodiment of the application provides a vibration isolation device and a vibration isolation method, which can adjust performance parameters of the vibration isolation device and improve the vibration isolation effect of the vibration isolation device in a complex equipment environment.

The embodiment of the application provides a vibration isolation device, which comprises a vibration isolation main body, an electromagnetic device and a conductor, wherein an acceleration sensor is arranged on the vibration isolation main body; the electromagnetic device comprises a first magnet and a second magnet which are arranged in parallel, wherein the first magnet and the second magnet are respectively positioned on two sides of the vibration isolation main body and are oppositely arranged so as to generate a uniform magnetic field; and the conductor is fixedly connected to the vibration isolation body; the conductor is positioned in the uniform magnetic field, and the electrified conductor can generate electromagnetic force in the direction opposite to that of excitation force, and the excitation force is the force acted on the conductor by the vibration isolation body.

Optionally, the first magnet is a permanent magnet or an electromagnet, and the second magnet is a permanent magnet or an electromagnet; wherein the magnetic poles of the first magnet and the second magnet are opposite.

Optionally, the first magnet and the second magnet are both coils; wherein the magnetic pole of the first magnet after being electrified is opposite to the magnetic pole of the second magnet after being electrified.

Optionally, a displacement sensor is disposed on the conductor.

Optionally, the vibration isolation body comprises a first body, an upper connector and a lower connector, the conductor being fixed to the first body; one end face of the upper connecting piece is fixed to the upper surface of the first main body, and the other end face of the upper connecting piece is detachably connected to an excitation source or the middle raft body; one end face of the lower connecting piece is fixed to the lower surface of the first main body, and the other end face of the lower connecting piece is detachably connected to the mounting base; the lower connecting piece is provided with the acceleration sensor.

Optionally, the first magnet and the second magnet are both fixed to the excitation source or the intermediate raft body; or both the first magnet and the second magnet are fixed to the mounting base.

Optionally, the vibration isolation main body includes a first vibration isolation main body and a second vibration isolation main body, and the first vibration isolation main body and the second vibration isolation main body are respectively fixedly connected to two opposite surfaces of the conductor.

Optionally, the first and second vibration isolation bodies are made of rubber and are vulcanized and fixed to two opposite surfaces of the conductor respectively.

Optionally, a gap is left between the first magnet and the vibration isolation main body, and a gap is left between the second magnet and the vibration isolation main body.

Correspondingly, the embodiment of the application also provides a vibration isolation method, which comprises the following steps:

s100, presetting a target vibration reduction effect delta;

collecting an excitation signal of the vibration isolation main body;

carrying out Fourier transformation on the excitation signal to obtain a concerned frequency;

obtaining an initial displacement X of a conductor₀And an initial acceleration a of the vibration isolating body₀；

Acquiring an initial value of electromagnetic force generated by the conductor according to a product of the inherent stiffness of the vibration isolation body and the frequency of interest;

s200, acquiring voltage input into the conductor according to the following ampere force equation;

wherein U is the voltage input to the conductor, F_(t)Is an electromagnetic force, R_ORho is the resistivity of the conductor, L is the length of the conductor in the current direction, h is the thickness of the conductor, a is the width of the conductor, B is the magnetic induction intensity of a uniform magnetic field, and t is the time;

s300, inputting the calculated voltage into the conductor, and acquiring the acceleration a of the vibration isolation body_t；

S400, when the acceleration a_tLess than the initial acceleration a₀And when the difference value of the target vibration attenuation effect delta is obtained, outputting the corresponding voltage U_(t)；

When the acceleration a is_tGreater than or equal to the initial acceleration a₀And when the difference value of the target vibration damping effect delta is obtained, the steps S200 to S400 are circulated;

s500, according to the output voltage U_(t)Controlling a voltage input to the conductor to cause the conductor to generate the electromagnetic force in a direction opposite to an excitation force.

Optionally, in step S200, the voltage input to the conductor is obtained according to the following ampere force equation;

where U is the voltage input to the conductor, C is the economic coefficient, and F_(t)Is an electromagnetic force, R_OP is the resistivity of the conductor, L is the length of the conductor in the current direction, h is the thickness of the conductor, a is the width of the conductor,b is the magnetic induction intensity of the uniform magnetic field, and t is the time.

Optionally, in step S200, the economic coefficient C is selected within N limited times;

the step S400 further includes the following steps:

s410, acquiring the acceleration a_tLess than the initial acceleration a₀First said acceleration a of difference from said target damping effect delta_t；

S420, acquiring the first acceleration a_tCorresponding economic coefficient C_tAnd marked as initial economic coefficient C_m；

S430, acquiring the acceleration a_tLess than the initial acceleration a₀The acceleration a of the difference from the target vibration damping effect δ_t；

S440, acquiring the acceleration a_tCorresponding economic coefficient C_tAnd is marked as the current economic coefficient C_n；

S450, when the current economic coefficient C_nLess than the initial economic coefficient C_mThe current economic coefficient C_nTransition to the initial economic coefficient C_m；

Otherwise, maintaining the initial economic coefficient C_m；

Looping the steps S410-S450 for N limited times and outputting the initial economic coefficient C_m；

S460, obtaining the initial economic coefficient C_mThe corresponding voltage U_(t)。

Optionally, the economic coefficient C is selected according to the arithmetic progression.

Optionally, in step S100, the performing a fourier transform on the excitation signal to obtain the frequency of interest includes:

the displacement signal of the conductor is expanded by Fourier transform as follows:

wherein A is_nIs the amplitude of the nth harmonic component,is the phase of the nth harmonic component, A_OIs an initial amplitude, n is a natural number, ω₁Is the angular frequency;

the expression for the frequency of interest is:

wherein x is₁，x₂，…，x_kIs the sum of the harmonic components and is,is the amplitude of the k-th harmonic component,is the phase of the kth harmonic component, A_OIs an initial amplitude, k is a natural number, ω₁Is the angular frequency.

In the vibration isolation device in the embodiment, the first magnet and the second magnet are used for generating a uniform magnetic field, and the conductor fixed on the vibration isolation main body is positioned between the first magnet and the second magnet, so that the conductor is positioned in the uniform magnetic field, and the electrified conductor can generate electromagnetic force; the direction of the electromagnetic force is opposite to that of the exciting force, so that the vibration isolation performance is improved.

Meanwhile, the electromagnetic force can be adjusted by adjusting the voltage in the conductor so as to change the performance parameters of the vibration isolation device; therefore, in the environment of equipment with variable frequency or frequency band, the voltage in the input conductor can be adaptively adjusted according to the exciting force so as to ensure the vibration isolation effect.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural view of a vibration isolating device;

FIG. 2 is a flow chart of a method of vibration isolation.

Description of reference numerals:

100. a first body; 110. a first vibration isolating body; 120. a second vibration isolating body; 200. an upper connecting piece; 210. a middle raft body; 300. a lower connecting piece; 310. mounting a base; 320. an acceleration sensor; 410. a first magnet; 420. a second magnet; 500. a conductor; 510. and a displacement sensor.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Furthermore, it should be understood that the detailed description and specific examples, while indicating exemplary embodiments of the invention, are given by way of illustration and explanation only, and are not intended to limit the scope of the invention. In the present application, unless indicated to the contrary, the use of the directional terms "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, and more particularly to the orientation of the figures of the drawings; while "inner" and "outer" are with respect to the outline of the device.

The embodiment of the application provides a vibration isolation device and a vibration isolation method. The following are detailed below. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments.

Example one

A first embodiment of the present application provides a vibration isolation apparatus, which is an elastic member connecting an apparatus and a base, to reduce and eliminate vibration force transmitted from the apparatus to the base and vibration transmitted from the base to the apparatus. As shown in fig. 1, the vibration isolating device includes a vibration isolating body, an electromagnetic device, and a conductor 500, and the conductor 500 is fixedly coupled to the vibration isolating body. The electromagnetic device is used to generate a uniform magnetic field, and the vibration isolating body and the conductor 500 disposed thereon are both located in the uniform magnetic field, and when a voltage is input to the conductor 500, the conductor 500 can generate an electromagnetic force. In the operation of the vibration isolation device, vibration force is applied to the vibration isolation device from the outside, and the vibration isolation device transmits a part of the vibration force to the conductor 500, thereby forming an exciting force. The electromagnetic force generated by the conductor 500 in the uniform magnetic field is opposite to the direction of the exciting force, so that the exciting force can be completely or partially offset by using the electromagnetic force, thereby improving the vibration isolation effect of the vibration isolation device.

The electromagnetic device comprises a first magnet 410 and a second magnet 420, wherein the first magnet 410 and the second magnet 420 are respectively positioned at two sides of the vibration isolation main body and are oppositely arranged; while the first and second magnets 410 and 420 are parallel to each other to generate a uniform magnetic field using the first and second magnets 410 and 420.

The vibration isolation body is located between the first magnet 410 and the second magnet 420 in this application to ensure that the conductor 500 is in a uniform magnetic field. By adjusting the voltage on conductor 500, the magnitude of the electromagnetic force generated by conductor 500 is changed. When the vibration isolation device is in a working environment with variable frequency or frequency band, the exciting force exerted on the conductor 500 by the vibration isolation body can be changed; the magnitude of the electromagnetic force is adaptively changed by adjusting the voltage inputted from the conductor 500 so that the magnitude of the electromagnetic force can be closer to that of the exciting force. Since the direction of the electromagnetic force is opposite to the direction of the excitation force, the vibration of the vibration isolating device can be completely or mostly cancelled by adjusting the voltage of the conductor 500. In addition, the first vibration isolation main body 110 has a certain vibration damping effect, so that the vibration isolation device can have a good vibration isolation effect in a complex environment.

In the present application, the first magnet 410 and the second magnet 420 are disposed at the side of the vibration isolation body, so that the first magnet 410 and the second magnet 420 generate a uniform magnetic field perpendicular to the axial direction of the vibration isolation body; when a voltage is input into the conductor 500, the conductor 500 generates an electromagnetic force along its axial direction. The magnitude and direction of the input voltage are adjusted according to the magnitude and direction of the exciting force applied to the conductor 500 by the vibration isolating body.

In a further preferred orientation, the first magnet 410 may be a permanent magnet or an electromagnet, the second magnet 420 may also be a permanent magnet or an electromagnet, and the poles of the first magnet 410 and the second magnet 420 are opposite.

When the first magnet 410 and the second magnet 420 are both permanent magnets, the magnetic induction intensity of the uniform magnetic field is constant because the first magnet 410 and the second magnet 420 are fixedly assembled. The electromagnetic force generated by the conductor 500 may be calculated according to the following formula:

wherein F is the electromagnetic force generated by the conductor 500, B is the magnetic induction of the electromagnetic device, L is the length of the conductor 500 along the current direction, U is the voltage introduced into the conductor 500, and R is₀For the resistance value of the resistor, ρ is the resistivity of the material, h is the thickness of the conductor 500, and a is the width of the conductor 500. Meanwhile, in the present embodiment, since the first magnet 410 and the second magnet 420 are both permanent magnets, B, h, a, ρ, and L are constant values, and the electromagnetic force F is obtained_{Electromagnetic force}Is proportional to the voltage U and therefore the magnitude of the electromagnetic force can be controlled by controlling the voltage in the input conductor 500.

When the first and second magnets 410 and 420 are both electromagnets or one of the first and second magnets 410 and 420 is an electromagnet, the magnetic induction intensity of the uniform magnetic field can be changed by synchronously adjusting the first and second magnets 410 and 420, and the electromagnetic force generated by the conductor 500 can also be adjusted, thereby increasing a control factor for changing the electromagnetic force.

In another preferred embodiment, a displacement sensor 510 is disposed on the conductor 500. In an initial state, the displacement of the conductor 500 can be determined by using the displacement sensor 510, so that a frequency spectrum of a desired frequency or frequency band is obtained by using fourier transform, and then electromagnetic force is calculated according to the desired frequency spectrum, and then voltage in the input conductor 500 is deduced. By utilizing the displacement sensor 510 arranged on the conductor 500, the application scenes of the vibration isolation device can be increased, so that the vibration isolation device can also keep a better vibration isolation effect under certain specific frequencies or frequency bands, and the performance of the vibration isolation device is further improved.

In another preferred aspect, the first magnet 410 and the second magnet 420 are symmetrically disposed about the vibration isolation body. When the first magnet 410 and the second magnet 420 are disposed in parallel and opposite to each other, the uniform magnetic field is not formed at the portion where the first magnetic field and the second magnetic field are misaligned, and only the portion where the first magnet 410 and the second magnet 420 correspond to each other can form the uniform magnetic field. Therefore, by symmetrically arranging the first magnet 410 and the second magnet 420 having opposite magnetic poles, the formation area of the uniform magnetic field can be maximized to ensure that the conductor 500 is always positioned in the uniform magnetic field. The first magnet 410 and the second magnet 420, which are symmetrically arranged, facilitate determination of the installation position to ensure assembly accuracy.

Further, a certain gap is left between the first magnet 410 and the vibration damping body, and a certain gap is also left between the second magnet 420 and the vibration damping body, which are substantially equal in the present embodiment. A gap is reserved between each of the first magnet 410 and the second magnet 420 and the vibration isolation main body, so that when the vibration isolation main body vibrates under the action of exciting force and electromagnetic force, the first magnet 410 and the second magnet 420 can avoid vibration, so as to ensure the stability of uniform magnetic fields generated by the first magnet 410 and the second magnet 420. The gap is small in the present embodiment, so that the first magnet 410 and the second magnet 420 can be as close to the vibration isolating body as possible.

In another preferred embodiment, the vibration isolating body includes a first body 100, an upper connector 200, and a lower connector 300, and the upper connector 200 and the lower connector 300 are fixed to the upper surface and the lower surface of the first body 100, respectively. The conductor 500 is fixed to the first body 100, and thus can generate an electromagnetic force to be exerted on the first body 100. The lower end surface of the upper connecting member 200 is fixedly connected with the upper surface of the first main body 100, the upper end surface is detachably connected to the excitation source or the middle raft 210, and the upper connecting member 200 is connected to the machine foot of the excitation source or the middle raft 210 through bolts in the embodiment. The upper end surface of the lower connector 300 is fixedly coupled to the lower surface of the first body 100, and the lower end surface thereof is detachably coupled to the mounting base 310, and in this embodiment, the lower connector 300 is coupled to the mounting base 310 by fastening bolts. The upper connector 200 is used to removably connect with the excitation source/intermediate raft 210, and the lower connector 300 is removably connected with the mounting base 310, facilitating the installation and removal of the vibration isolation apparatus.

In addition, the vibration isolator in this embodiment may be a rubber vibration isolator or a metal rubber vibration isolator, and thus the material of the first body 100 may be rubber or metal rubber. When the material of the first body 100 is rubber, the first body 100 may be fixedly connected to the upper and lower connection members 200 and 300 by vulcanization; when the material of the first body 100 is metal rubber, the first body 100 may be fixed to the upper and lower connectors 200 and 300 by welding.

In a further refinement, an acceleration sensor 320 is arranged on the lower connecting piece 300. Since the lower connector 300 is used to connect the first body 100 and the mounting base 310, there is a force between the mounting base 310 and the first body 100. With the acceleration sensor 320 provided on the lower link 300, the acceleration of the lower link 300 can be acquired to facilitate determination of the vibration damping effect.

In a further refinement, both the first magnet 410 and the second magnet 420 are fixed to the excitation source or intermediate raft 210; or both the first magnet 410 and the second magnet 420 are fixed to the mounting base 310. The first magnet 410 and the second magnet 420 are fixed by using the machine feet of the excitation source, the middle raft 210 or the mounting base 310, so that the vibration of the first magnet 410 and the second magnet 420 can be reduced, and the stability of the uniform magnetic field can be ensured. Meanwhile, the installation positions of the first magnet 410 and the second magnet 420 are consistent, for example, if the first magnet 410 is installed on the middle raft 210, the second magnet 420 is also installed on the middle raft 210, so that the corresponding portions of the first magnet 410 and the second magnet 420 are maximized, and it is ensured that the uniform magnetic field can always completely cover the conductor 500.

In another preferred aspect, the vibration isolating body includes a first vibration isolating body 110 and a second vibration isolating body 120, and the first vibration isolating body 110 and the second vibration isolating body 120 are respectively located at two opposite sides of the conductor 500, where the first vibration isolating body 110 is fixedly connected to an upper surface of the conductor 500 and the second vibration isolating body 120 is fixedly connected to a lower surface of the conductor 500. In this application, the conductor 500 is fixed between the first vibration isolation main body 110 and the second vibration isolation main body 120, so that the conductor 500 is completely located in a uniform magnetic field, and the interference and influence of the first vibration isolation main body 110 and the second vibration isolation main body 120 on the conductor 500 can be avoided.

In addition, the first and second vibration isolation main bodies 110 and 120 are symmetrically disposed about the conductor 500, so that a central axis of an excitation force applied to the conductor 500 by the first vibration isolation main body 110 and a central axis of an excitation force applied to the conductor 500 by the second vibration isolation main body 120 are disposed in a collinear manner, thereby preventing the conductor 500 from generating a torque and ensuring a vibration damping effect of the vibration isolation device. Meanwhile, the first and second vibration isolation bodies 110 and 120 are restricted from being symmetrically fixed, and the installation positions of the first and second vibration isolation bodies 110 and 120 are also conveniently determined. In this application, the central axis of the first vibration isolation main body 110, the central axis of the conductor 500, and the central axis of the second vibration isolation main body 120 are all arranged in a collinear manner, so that the exciting force and the electromagnetic force are collinear.

In the present embodiment, the first and second vibration isolating bodies 110 and 120 are both rubber, and thus both the first and second vibration isolating bodies 110 and 120 may be fixed to the conductor 500 through a vulcanization process.

In addition, in another embodiment, if the conductor 500 is embedded inside the vibration isolation body to generate electromagnetic force, it is necessary to ensure that the vibration isolation body has magnetic conductivity so as to reduce or avoid the influence of the vibration isolation body on the conductor 500.

Example two

The present embodiment includes most of the technical features of the first embodiment, and the difference with respect to the first embodiment is that the first magnet 410 and the second magnet 420 are both coils, and the magnetic pole of the first magnet 410 is opposite to the magnetic pole of the second magnet 420 after being energized. Meanwhile, the current introduced by the first magnet 410 is equal to the current introduced by the second magnet 420 in the present application, so as to ensure that the first magnet 410 and the second magnet 420 generate uniform magnetic fields.

The first magnet 410 and the second magnet 420 are arranged on the side of the vibration isolation body, so that the first magnet 410 and the second magnet 420 can generate uniform magnetic fields perpendicular to the axial direction of the vibration isolation body; when a voltage is input into the conductor 500, the conductor 500 generates an electromagnetic force opposite to the exciting force. The magnitude and direction of the input voltage are adjusted according to the magnitude and direction of the exciting force applied to the conductor 500 by the vibration isolating body. The electromagnetic force can be closer to the exciting force, and the direction of the electromagnetic force is opposite to that of the exciting force, so that the vibration isolation device can have a good vibration isolation effect in a complex environment.

EXAMPLE III

In this embodiment, according to the vibration isolation device of the first embodiment or the second embodiment, the vibration isolation method specifically includes the following steps:

s100, presetting a target vibration reduction effect delta; in this embodiment, the preset target vibration damping effect δ may be determined according to a specific application scenario of the vibration isolation device;

collecting an excitation signal of the vibration isolation main body; in the application, the excitation signal of the stable system is a periodic signal;

carrying out Fourier transformation on the excitation signal to obtain a concerned frequency;

obtaining an initial displacement X of the conductor 500₀And an initial acceleration a of the vibration isolating body₀；

Acquiring an initial value of the electromagnetic force generated by the conductor 500 according to a product of the inherent stiffness of the vibration isolating body and the frequency of interest;

s200, acquiring the voltage input into the conductor 500 according to the following ampere force equation;

wherein U is the voltage input to the conductor, F_(t)Is an electromagnetic force, R_ORho is the resistivity of the conductor, L is the length of the conductor in the current direction, h is the thickness of the conductor, a is the width of the conductor, B is the magnetic induction intensity of a uniform magnetic field, and t is the time;

s300, inputting the calculated voltage into the conductor 500 and acquiring the acceleration a of the vibration isolation body_t；

S400, when the acceleration a_tLess than the initial acceleration a₀And when the difference value of the target vibration attenuation effect delta is obtained, outputting the corresponding voltage U_(t)；

When the acceleration a is_tGreater than or equal to the initial acceleration a₀And when the difference value of the target vibration damping effect delta is obtained, the steps S200 to S400 are circulated;

s500, according to the output voltage U_(t)The voltage input to the conductor 500 is controlled so that the conductor 500 generates the electromagnetic force in a direction opposite to the direction of the exciting force.

Obtains the voltage value inside the input conductor 500 according to the ampere force equation, and then obtains the voltage value according to the acceleration a_tLess than the initial acceleration a₀And the difference value of the target vibration damping effect delta is judged, and when the judgment condition is satisfied, the corresponding voltage is output. Then the voltage is input into the conductor 500, and the electromagnetic force generated by the conductor 500 in the uniform magnetic field can completely or mostly counteract the excitation force generated under the action of the excitation signal, so that the vibration isolation device can have a good vibration isolation effect in a complex environment.

In a further preferred scheme, in step S200, the voltage input to the conductor 500 is obtained according to the following ampere force equation;

where U is the voltage input to the conductor, C is the economic coefficient, and F_(t)Is an electromagnetic force, R_ORho is the resistivity of the conductor, L is the length of the conductor in the current direction, h is the thickness of the conductor, a is the width of the conductor, B is the magnetic induction intensity of the uniform magnetic field, and t is the time.

In the process of canceling the exciting force by using the electromagnetic force, if the electromagnetic force generated by the conductor 500 completely or mostly cancels the exciting force, excessive resources may be consumed. Therefore, under the condition that the target effect is achieved in the control strategy, the economic coefficient C is set, the resources are used as little as possible, and the economical efficiency of the vibration isolation device is ensured when the vibration isolation device is used.

In a further preferred embodiment, in step S200, the economic coefficient C is selected within N limited times;

the step S400 further includes the following steps:

s410, acquiring the acceleration a_tLess than the initial acceleration a₀First said acceleration a of difference from said target damping effect delta_t；

S420, acquiring the first acceleration a_tCorresponding economic coefficient C_tAnd marked as initial economic coefficient C_m；

S430, acquiring the acceleration a_tLess than the initial acceleration a₀The acceleration a of the difference from the target vibration damping effect δ_t；

S440, acquiring the acceleration a_tCorresponding economic coefficient C_tAnd is marked as the current economic coefficient C_n；

S450, when the current economic coefficient C_nLess than the initial economic coefficient C_mThe current economic coefficient C_nTransition to the initial economic coefficient C_m；

Otherwise, maintaining the initial economic coefficient C_m；

Looping the steps S410-S450 for N limited times and outputting the initial economic coefficient C_m；

S460, obtaining the initial economic coefficient C_mThe corresponding voltage U_(t)。

In this embodiment, the acceleration a is satisfied by performing N cycles_tLess than the initial acceleration a₀Acceleration a of difference from target vibration-damping effect delta_tAnd screening the voltage corresponding to the acceleration. Screening under the condition of satisfying the electromagnetic force and realizing the target effectThe minimum economic coefficient is obtained, and the economy of the vibration isolation device is improved.

In a further improved scheme, the economic coefficient C is selected according to the arithmetic progression, so that the economic coefficient C is convenient to select, and the uniformity in the selection process can be improved.

In a further improved scheme, in step S100, the fourier transforming the excitation signal to obtain the frequency of interest includes:

the displacement signal of the conductor is expanded by Fourier transform as follows:

wherein A is_nIs the amplitude of the nth harmonic component,is the phase of the nth harmonic component, A_OIs an initial amplitude, n is a natural number, ω₁Is the angular frequency;

the expression for the frequency of interest is:

wherein x is₁，x₂，…，x_kIs the sum of the harmonic components and is,is the amplitude of the k-th harmonic component,is the phase of the kth harmonic component, A_OIs an initial amplitude, k is a natural number, ω₁Is the angular frequency.

Because the excitation signal is a periodic signal, the frequency of interest can be obtained by developing the periodic signal by utilizing Fourier transform, then the initial value of the electromagnetic force can be obtained by utilizing the product of the inherent rigidity of the vibration isolation main body and the frequency of interest, and the magnitude order of the electromagnetic force can be preliminarily judged so as to be convenient for subsequent further operation.

In addition, the Fourier transform is utilized to analyze the excitation signal, so that the vibration isolation effect under certain specific frequency or frequency band can be realized according to different environments, and the more accurate vibration isolation effect is realized, thereby improving the vibration isolation effect of the vibration isolation device in the complex environment.

The vibration isolation device and the vibration isolation method provided by the embodiments of the present application are described in detail above, and the principles and embodiments of the present application are explained herein by applying specific examples, and the description of the embodiments above is only used to help understand the method and the core ideas of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.