A bionic composite low-frequency anti-overturning vibration isolator and method

Abstract

This invention belongs to the field of low-frequency vibration isolation technology, specifically disclosing a biomimetic composite low-frequency anti-overturning vibration isolator and method. The isolator includes: a first platform and a second platform connected by a biomimetic skeletal muscle vibration isolation component; and a second platform and a third platform connected by a biomimetic fat damping component. The biomimetic skeletal muscle vibration isolation component includes two symmetrically arranged vibration isolation units. Each vibration isolation unit includes: a rhombic structure; a first tension spring is connected between two hinge shafts along the long diagonal of the rhombic structure; the other two hinge shafts of the rhombic structure are respectively connected to a linear motor via couplings; a second tension spring is connected between the two hinge shafts along the long diagonal of the rhombic structure and the second platform; and a third tension spring is connected between the two hinge shafts along the long diagonal of the rhombic structure and the first platform. This invention can suppress low-frequency vibrations, thereby achieving a vibration reduction effect across almost the entire frequency range.

Description

Technical Field

[0001] The invention relates to the technical field of low-frequency vibration isolation, and in particular to a bionic composite low-frequency anti-overturning vibration isolator and a method thereof. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] Vibration isolators are elastic elements that connect equipment and foundations, used to reduce and eliminate vibration forces transmitted from equipment to foundations and vibrations transmitted from foundations to equipment. Vibration isolators are widely used in various precision instrument scenarios. However, traditional passive vibration isolation systems are linear systems that are only effective for medium and high frequency vibration isolation and have poor suppression effects on low frequency vibrations. The specific vibration isolation effect is related to the natural frequency and damping ratio of the passive vibration isolation system itself. Existing nonlinear vibration isolation devices mostly reduce the stiffness of the system by connecting negative stiffness elements in parallel, thereby reducing the natural frequency of the system, so that nonlinear vibration isolation devices can effectively reduce the vibration transmission rate in a wider frequency range. Nonlinear energy harvesting systems can collect energy from various excitations.

[0004] Bionic devices have also been proven to be effective in vibration isolation, but existing nonlinear bionic isolators limit the load-bearing capacity of the system. This load-bearing capacity and low-frequency vibration isolation are contradictory in traditional isolators and are difficult to control and adjust.

[0005] The latest bionic vibration isolators are mostly nonlinear vibration isolators with leg-like configurations. The multi-layer scissor-type vibration isolation platform is high in height and has a large space volume. It is generally necessary to design multiple scissor-type vibration isolation legs to prevent overturning. The structure is complex and it is difficult to achieve active controllable vibration suppression. Although the bionic origami vibration isolator is lightweight, its structural design is complex and its load capacity is limited, so it has not yet been widely used. Summary of the invention

[0006] In order to solve the above problems, the present invention proposes a bionic composite low-frequency anti-overturning vibration isolator and method. By setting a double-layer bionic vibration isolation structure of a bionic leg muscle and bone vibration reduction structure and a bionic fat layer vibration reduction structure, the vibration isolation structures of each layer with different vibration isolation characteristics are connected in series for vibration isolation, so as to achieve a good and stable vibration isolation effect in the whole frequency domain, especially vibration isolation in the low-frequency and ultra-low-frequency bands, and has anti-overturning capability, taking into account both simple structure and compact space.

[0007] In some embodiments, the following technical solutions are adopted:

[0008] A bionic composite low-frequency anti-overturning vibration isolator, comprising: a first platform, a second platform and a third platform arranged in parallel; the first platform and the second platform are connected by a bionic skeletal muscle vibration isolation component, and the second platform and the third platform are connected by a bionic fat shock-absorbing component;

[0009] The bionic skeletal muscle vibration isolation assembly comprises two groups of vibration isolation units which are symmetrically arranged; each group of vibration isolation units comprises: a rhombus structure, wherein the rhombus structure comprises two rhombus hinges which are arranged oppositely and in parallel, wherein the vertices of the two rhombus hinges are respectively connected by hinge shafts, and at the same time, the four vertices of each rhombus hinge are hinged by corresponding hinge shafts;

[0010] A first tension spring is connected between the two articulated shafts in the long diagonal direction of the diamond structure, and the other two articulated shafts of the diamond structure are connected to the linear motor through couplings respectively; a second tension spring is connected between the two articulated shafts in the long diagonal direction of the diamond structure and the second platform respectively, and a third tension spring is connected between the two articulated shafts in the long diagonal direction of the diamond structure and the first platform respectively.

[0011] As an optional solution, the first tension spring, the second tension spring and the third tension spring are in a pre-tensioned state during operation;

[0012] Alternatively, the first tension spring, the second tension spring and the third tension spring are all compression springs.

[0013] As an optional solution, the angle α between the first tension spring and the corresponding side of the rhombus hinge satisfies ; The second tension spring and the third tension spring are symmetrically arranged relative to the first tension spring; The second tension spring is hinged to the second platform, and the third tension spring is hinged to the first platform; The angle between the second tension spring and the second platform satisfy: ; The angle between the third tension spring and the first platform satisfy: .

[0014] As an optional solution, the second tension spring and the third tension spring meet a set stiffness condition so that the diamond structure has an upward supporting force.

[0015] As an optional solution, the two articulated shafts in the short diagonal direction of the diamond structure are respectively connected to the linear motors through couplings; wherein the articulated shaft close to the first platform is connected to the first linear motor, and the first linear motor is fixed on the first platform; the articulated shaft close to the second platform is connected to the second linear motor, and the second linear motor is fixed on the second platform; the first linear motor and the second linear motor move synchronously in opposite directions;

[0016] The first linear motors or second linear motors of different rhombus structures adjust the posture of the rhombus structure independently of each other.

[0017] As an optional solution, a plurality of mounting holes are symmetrically provided on each side of the diamond-shaped hinge, and a tension spring is installed between the mounting hole and the corresponding first platform or second platform.

[0018] As an optional solution, polyurethane foam is sprayed around the position on the first platform connected to the linear motor or the third tension spring, and holes are punched around the position according to a set pore size and perforation rate to form a perforated plate resonance sound absorbing material.

[0019] As an optional solution, the bionic fat shock-absorbing component includes: a double-layer high and low column silicone pad stacked up and down, each layer of high and low column silicone pad is provided with a cylindrical silicone boss with different heights and diameters; the bosses of the upper layer of high and low column silicone pad are arranged alternately with the bosses of the lower layer of high and low column silicone pad; the stacking height of the double-layer high and low column silicone pad is higher than the linear motor, and the outer periphery of each layer of high and low column silicone pad is limited by a limit block.

[0020] As an optional solution, a plurality of the above-mentioned bionic composite low-frequency anti-overturning vibration isolators are repeatedly arranged according to a set rule; the second platforms of two adjacent vibration isolators are connected by a hinge or a universal joint.

[0021] In other embodiments, the following technical solutions are adopted:

[0022] A vibration isolation method for a bionic composite low-frequency anti-overturning vibration isolator, comprising:

[0023] The leg skeletal muscles and joints are simulated by a bionic skeletal muscle vibration isolation component; the distance between the first platform and the second platform is adjusted by a linear motor, thereby changing the pre-stretching amount of the first tension spring, and then changing the stiffness and posture of the bionic skeletal muscle vibration isolation component; the diamond structure has an upward support force by adjusting the stiffness of the second tension spring and the third tension spring; the linear motors of the two sets of vibration isolation units work independently, and can control the second platform to always remain horizontal whether the base of the vibration isolation object is horizontal or uneven;

[0024] The bionic fat damping component simulates the multiple layers of subcutaneous fat to suppress vibration resonance and lateral shear vibration.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) The present invention aims to solve the current problem of difficulty in suppressing vibration in the low-frequency band. Inspired by the tapir's bulky body but flexible movement and stable core, the present invention integrates the tapir's motion vibration reduction characteristics similar to those of horses and pigs. Considering that its stability-maintaining vibration reduction coupling mechanism involves the coordinated movement of bones, muscles and joints, the present invention integrates the bionic leg bone and muscle group structure with the tapir's thick abdominal fat layer to design a vibration isolator including a bionic skeletal muscle vibration isolation component and a bionic fat shock-absorbing component. A diamond-shaped hinge is designed in the bionic skeletal muscle vibration isolation component. Combined with the shock absorption of the bionic fat shock-absorbing component, the low-frequency vibration can be suppressed, thereby achieving a vibration reduction effect of nearly the entire frequency band.

[0027] (2) The present invention only needs two bionic legs to effectively prevent torsional vibration on the basis of vibration reduction. The vibration isolator of the present invention has a simple structure and is easy to control. The spacing between the first platform and the second platform can be adjusted by a linear motor to adapt to a narrow working environment. The two linear motors work independently to ensure that the first platform and the second platform are always in a horizontal state, which can be applied to an uneven ground. The vibration isolator of the present invention can further improve the space utilization and horizontal calibration characteristics on the basis of a simplified structure, further expanding the application range of the vibration isolator.

[0028] (3) The present invention can form different vibration isolation platform shapes by repeatedly arranging multiple vibration isolators. The position and posture of a single vibration isolator can be adjusted independently, which can fully adapt to the uneven shape of the bottom of the vibration-isolated instrument itself and ensure the vibration isolation effect.

[0029] Other features and advantages of additional aspects of the present invention will be given in part in the following description, and in part will become obvious from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The schematic diagram of the structure is designed with reference to the movement process of the tapir in the embodiment of the present invention;

[0031] Figure 2 It is a schematic diagram of the structure of a bionic composite low-frequency anti-overturning vibration isolator in an embodiment of the present invention;

[0032] Figure 3 It is a side view of the bionic composite low-frequency anti-overturning vibration isolator in an embodiment of the present invention;

[0033] Figure 4 It is a vibration isolation principle diagram of the bionic composite low-frequency anti-overturning vibration isolator in an embodiment of the present invention;

[0034] Figure 5 It is a schematic diagram of the structure of the bionic composite low-frequency anti-overturning vibration isolation system in an embodiment of the present invention;

[0035] Among them, 1. the first platform, 2. the third tension spring, 3. polyurethane foam, 4-1. the first linear motor, 4-2. the second linear motor, 5. the damping hinge, 6. the first tension spring, 7. the second platform, 8. the high and low column silicone pads, 9. the third platform, 10. the displacement sensor, 11. the coupling, 12. the limit block, 13. the support stud, 14. the second tension spring, 15. the linear angle code, 16. the fisheye bearing, 17. the limit pad, 18. the hinge. DETAILED DESCRIPTION

[0036] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0037] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0038] Embodiment 1

[0039] Based on the idea of ​​bionics, inspired by the tapir's bulky body but flexible movement and stable core, and combining the vibration reduction characteristics of horses and pigs, it is concluded that the tapir's stability and vibration reduction coupling mechanism involves the coordinated movement of bones, muscles, fat and joints. This embodiment is based on the vibration reduction characteristics of the tapir's legs, and then imitates the characteristics of the tapir's leg bones, muscle group structure and the tapir's thick abdominal fat layer, and draws on these natural vibration isolation mechanisms of the tapir to design a bionic composite low-frequency anti-overturning vibration isolator with low-frequency vibration isolation performance and anti-overturning performance.

[0040] The vibration isolator of this embodiment can imitate the posture control of a tapir during its movement. Through the diamond structure and the second and third tension springs, it can provide nonlinear support force, which helps to reduce the resonance frequency and widen the vibration suppression frequency band. In addition, the linear motor adjusts the posture of the diamond structure, the second and third tension springs, thereby realizing active control of the vibration isolation function. This embodiment couples active control on the basis of nonlinear design, thereby reducing the natural frequency of the vibration isolator without sacrificing the bearing capacity, and has anti-overturning and adaptive excitation for various working conditions such as uneven ground and unequal base of the vibration isolation equipment.

[0041] Figure 1A structural diagram designed with reference to the tapir's movement process is given. The bones are bionicized by diamond hinges, the muscles are bionicized by the first tension spring, the second tension spring, the third tension spring and the damping hinge, the joints are bionicized by hinges, and the fat is bionicized by double-layer high and low column silicone pads.

[0042] In one or more embodiments, a bionic composite low-frequency anti-overturning vibration isolator is disclosed, combined with Figure 2 and Figure 3 , specifically including the following structure: a first platform 1, a second platform 7 and a third platform 9 arranged in parallel; the first platform 1 and the second platform 7 are connected by a bionic skeletal muscle vibration isolation component, and the second platform 7 and the third platform 9 are connected by a bionic fat shock-absorbing component.

[0043] Among them, the bionic skeletal muscle vibration isolation component includes two groups of vibration isolation units that are symmetrically arranged; each group of vibration isolation units includes: a rhombus structure, the rhombus structure includes two rhombus hinges that are arranged oppositely and in parallel, each rhombus hinge has four straight angle codes 15 as four sides, and the straight angle codes 15 are linear long stainless steel porous steel strips; the four sides are connected end to end through an articulated joint; the vertices of the two rhombus hinges are respectively connected through an articulated shaft, and the articulated shaft is wrapped front and back through the two rhombus hinges to enhance the load-bearing stability. At the same time, the four vertices of each rhombus hinge are articulated through the articulated shafts at the corresponding positions; as a specific implementation method, the two adjacent sides of the rhombus hinge can be articulated through an adjustable damping hinge 5; the adjustable damping hinge is used to simulate knee joint damping to suppress vibrations within the resonance frequency band.

[0044] For the convenience of description, the two hinge axes in the long diagonal direction of the rhombus structure are referred to as the first hinge axis and the second hinge axis, and the two hinge axes in the short diagonal direction of the rhombus structure are referred to as the third hinge axis and the fourth hinge axis.

[0045] In this embodiment, a first tension spring 6 is connected between the first hinge axis and the second hinge axis of the rhombus structure, and the leg skeletal muscle is biomimetic through the first tension spring; the angle α between the first tension spring and the corresponding side of the rhombus hinge satisfies .

[0046] In this embodiment, the first tension spring is a component that provides restoring force and needs to be in a stretched state during the working period. Initially, the initial preload is ensured by selecting a suitable original length of the first tension spring.

[0047] Assuming that the length of the first tension spring 6 in the free state is L0, and it is in a pre-tensioned state after being supported by the second platform 7, the elastic force of the first tension spring is transmitted to the first platform 1 and the second platform 7 respectively through the diamond structure, which can provide nonlinear supporting force, help reduce the resonance frequency, and widen the vibration suppression frequency band.

[0048] The third hinge axis of the diamond structure is close to the first platform 1, and the third hinge axis is connected to the coupling through a section of support studs, and the coupling is connected to the first linear motor 4-1, and the first linear motor 4-1 is connected to the first platform 1 through a hinge. As a specific implementation, a fisheye bearing joint is provided on the third hinge axis, one end of the fisheye bearing 16 is connected to the third hinge axis, and the other end is connected to the first linear motor 4-1 through a support stud through a coupling; the fisheye part has rotational freedom, and the rotational freedom is limited by a limit pad 17; under the limitation of the diamond hinge, the diamond structure has a certain forward and backward adjustment ability; in addition, the rotational freedom can also be limited by the bionic fat shock-absorbing component between the second platform 7 and the third platform 9.

[0049] Tapirs and horses have similar natural hole structures in their leg joints, which makes the legs of tapirs and horses bear strong pressure from body weight and air resistance when running; based on this characteristic, in this embodiment, necessary perforations are made on the first platform according to the connection requirements of the hinge, and holes are made around the hinge connection position of the first platform with a certain aperture and perforation rate, which can form a perforated plate resonant sound-absorbing material, which helps to dissipate sound energy and widen the vibration attenuation domain. In addition, polyurethane foam 3 is sprayed on the connection section of the support stud and the connection position of the first linear motor and the first platform, which can simulate the bone structure of the tapir similar to that around the third metacarpal bone around the horse's leg, which can suppress the vibration source and the vibration generated by the first linear motor itself, further enhance the stability of the connection, and ensure verticality.

[0050] The fourth hinge axis of the diamond structure is close to the second platform 7. The fourth hinge axis is connected to the coupling 11 through a section of supporting studs 13. The coupling 11 passes through the second platform 7 to connect to the second linear motor 4-2. The second linear motor is fixed to the upper surface of the second platform 7 by bolts. Similarly, on the second platform 7, a perforated plate resonance sound-absorbing material can also be formed by punching holes. At the same time, polyurethane foam 3 is sprayed on the connecting section of the supporting studs 13 and the connecting position between the second linear motor and the second platform. The specific effect is the same as mentioned above and will not be described in detail.

[0051] In this embodiment, the first linear motor 4 - 1 and the second linear motor 4 - 2 move synchronously in opposite directions to ensure that the diamond structure is always located between the first platform 1 and the second platform 7 .

[0052] Assume that H is the height distance between the first platform and the second platform, and h is the height distance between the short diagonals of the diamond structure in the initial equilibrium state; then it satisfies: H=h+2hm, where hm is the screw distance controlled by the first linear motor and the second linear motor respectively; the two linear motors can adjust the height distance H between the first platform and the second platform by changing hm.

[0053] In this embodiment, an acceleration sensor or a displacement sensor 10 is installed on the second platform by magnetic attraction, so as to detect the distance between the first platform and the second platform; according to the measured frequency characteristics of the external excitation signal and the mass of the equipment to be isolated on the vibration suppression platform, the distance between the first platform and the second platform can be adjusted to adjust the posture of the diamond structure, and then the elongation of the first tension spring, the second tension spring and the third tension spring is changed to change the frequency band range that can be isolated by the vibration isolator, so as to suppress the signal of the frequency band that needs to be isolated by the measured external excitation signal.

[0054] The short diagonal length of the diamond structure can be adjusted to h by the first linear motor and the second linear motor to apply preload, adjust the preload of the first tension spring, and change the stiffness of the bionic leg muscle bone vibration reduction structure to avoid the resonance range. At the same time, the tapir leg posture can be changed to adapt to the narrow space requirements of the vibration isolation platform.

[0055] It should be noted that the linear motors in the two sets of vibration isolation units are independent of each other in adjusting the posture of the diamond structure. When the excitation plane is not horizontal, the linear motors in the two sets of vibration isolation units can adjust the height difference of the diamond structure to ensure that the second platform and the third platform are level when working.

[0056] In this embodiment, the second tension spring 14 is connected between the first hinge shaft of the diamond structure and the second platform 7, and the third tension spring 2 is connected between the first hinge shaft and the first platform; similarly, the second hinge shaft and the second platform are connected with the second tension spring 14, and the second hinge shaft and the first platform are connected with the third tension spring 2. The second tension spring 14 and the third tension spring 2 can simulate the thick and oblique muscle groups of the legs.

[0057] The second tension spring 14 and the third tension spring 2 are symmetrically arranged relative to the first tension spring 6; the second tension spring 14 is hinged to the second platform 7, and the third tension spring 2 is hinged to the first platform 1; as a specific implementation, the hinge can be realized by a hinge. Similarly, polyurethane foam is sprayed on the hinge position.

[0058] The angle between the second tension spring and the second platform satisfy: ; The angle between the third tension spring and the first platform satisfy: As a better example, .

[0059] When the second platform or the third platform deviates from the horizontal plane and is subjected to overturning vibration, the vibration isolation platform can be kept horizontal by relying on the reverse torque provided by the second tension spring and the third tension spring, thereby realizing the anti-overturning function.

[0060] In some embodiments, in combination Figure 4 The first tension spring, the second tension spring and the third tension spring are all pre-tension springs with a stiffness of , the length in the free state is ; The first tension spring stiffness is , the length in the free state is ; To ensure the load of the vibration isolation table, the following relationship must be satisfied between the tension springs:

[0061] ;

[0062] ;

[0063] in, is the distance between the hinge point between the second tension spring and the second platform and the hinge point between the diamond structure and the second platform; or, the distance between the hinge point between the third tension spring and the first platform and the hinge point between the diamond structure and the first platform; both are the same. H is the height distance between the first platform and the second platform; h is the height distance between the short diagonals of the diamond structure in the initial equilibrium state; represents the angle between the second tension spring and the second platform or the angle between the third tension spring and the first platform; It is the difference in amplitude between the first and second platforms when the external vibration is transmitted to the second platform through the first platform; L is the length of the stainless steel straight angle code.

[0064] The stiffness of the second and third tension springs as well as the stiffness of the first tension spring can be adjusted to ensure that the diamond structure has an upward supporting force to provide a sufficiently large bearing capacity.

[0065] In other embodiments, the first tension spring, the second tension spring and the third tension spring may all be compression springs, and in this case, the compression springs need to be in a pre-compression state initially.

[0066] As an example, there are many holes on the linear angle code for hinge installation. More damping hinges can be installed at different holes, and more linear tension springs can be fixed between the first hinge axis and the first platform and the second platform, and between the second hinge axis and the first platform and the second platform in the same way as the installation of the second tension spring and the third tension spring, so as to better simulate the rich muscle groups of the tapir's legs and increase the reverse restoring torque.

[0067] In this embodiment, combined with Figure 3The second platform and the third platform are connected by a bionic fat shock-absorbing component; the bionic fat shock-absorbing component is used to simulate the vibration reduction of the multiple fat layers under the skin of the tapir, and the bionic fat shock-absorbing component includes: a double-layer high and low column silicone pad 8 stacked up and down, each layer of high and low column silicone pad 8 is provided with a cylindrical silicone boss of different heights and diameters to approach the uneven state of the tapir's subcutaneous fat and suppress vibration resonance; the boss of the upper layer of high and low column silicone pad and the boss of the lower layer of high and low column silicone pad are staggered to form a limit to prevent lateral shear vibration between the second platform and the third platform; the second platform and the third platform are respectively equipped with limit blocks 12 to further prevent lateral shear vibration. The stacking height of the double-layer high and low column silicone pad is higher than the linear motor, and the periphery of each layer of high and low column silicone pad is limited by the limit block.

[0068] The double-layer high and low column silicone pad of this embodiment has a natural frequency of 4 Hz and a damping ratio of 0.12-0.15. It has a low natural frequency and a large damping characteristic, can further dissipate vibration capacity, and further attenuate vibration, which is equivalent to multi-stage vibration isolation.

[0069] In other embodiments, in combination Figure 5 , multiple bionic composite low-frequency anti-overturning vibration isolators are repeatedly arranged according to set rules, for example, they can be arranged horizontally or vertically or in an array, and the second platforms of two adjacent vibration isolators are connected by hinges 18 or universal joints to form a large heavy-duty bionic low-frequency anti-overturning vibration isolator platform. The linear motor of each tapir-like low-frequency anti-overturning vibration isolator can independently control the second platform, and the tapir spine joints can independently adjust the posture to form different vibration isolation platform shapes, and the shape of the large vibration isolation platform can be adjusted according to the shape of the base of the vibration isolation equipment.

[0070] Embodiment 2

[0071] In one or more embodiments, a vibration isolation method of a bionic composite low-frequency anti-overturning vibration isolator is disclosed, comprising:

[0072] The leg skeletal muscles and joints are simulated by a bionic skeletal muscle vibration isolation component; the distance between the first platform and the second platform is adjusted by a linear motor, thereby changing the pre-stretching amount of the first tension spring, and then changing the stiffness and posture of the bionic skeletal muscle vibration isolation component; the diamond structure has an upward support force by adjusting the stiffness of the second tension spring and the third tension spring; the linear motors of the two sets of vibration isolation units work independently, and can control the second platform to always remain horizontal whether the base of the vibration isolation object is horizontal or uneven;

[0073] The bionic fat damping component simulates the multiple layers of subcutaneous fat to suppress vibration resonance and lateral shear vibration.

[0074] The specific implementation process is the same as that in Example 1 and will not be described in detail.

[0075] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A bionic composite low-frequency anti-overturning vibration isolator, characterized in that: include: A first platform, a second platform and a third platform are arranged in parallel; the first platform and the second platform are connected via a bionic skeletal muscle vibration isolation component, and the second platform and the third platform are connected via a bionic fat shock-absorbing component; The bionic skeletal muscle vibration isolation assembly comprises two groups of vibration isolation units which are symmetrically arranged; each group of vibration isolation units comprises: a rhombus structure, wherein the rhombus structure comprises two rhombus hinges which are arranged oppositely and in parallel, wherein the vertices of the two rhombus hinges are respectively connected by hinge shafts, and at the same time, the four vertices of each rhombus hinge are hinged by corresponding hinge shafts; A first tension spring is connected between the two articulated shafts in the long diagonal direction of the diamond structure, and the other two articulated shafts of the diamond structure are connected to the linear motors through couplings respectively; wherein the articulated shaft close to the first platform is connected to the first linear motor, and the first linear motor is fixed on the first platform; the articulated shaft close to the second platform is connected to the second linear motor, and the second linear motor is fixed on the second platform; the first linear motor and the second linear motor move synchronously in opposite directions; the second tension spring is respectively connected between the two articulated shafts in the long diagonal direction of the diamond structure and the second platform, and the third tension spring is respectively connected between the two articulated shafts in the long diagonal direction of the diamond structure and the first platform; The second tension spring and the third tension spring meet the set stiffness conditions so that the diamond structure has an upward supporting force; The first linear motor or the second linear motor of different rhombus structures adjusts the posture of the rhombus structure independently of each other; The bionic fat shock-absorbing component includes: a double-layer high and low column silicone pad stacked up and down, each layer of the high and low column silicone pad is provided with a cylindrical silicone boss with different heights and diameters; the boss of the upper layer of the high and low column silicone pad is arranged alternately with the boss of the lower layer of the high and low column silicone pad; the stacking height of the double-layer high and low column silicone pad is higher than the linear motor, and the outer periphery of each layer of the high and low column silicone pad is limited by a limit block.

2. The bionic composite low-frequency anti-overturning vibration isolator according to claim 1, characterized in that: The first tension spring, the second tension spring and the third tension spring are in a pre-tensioned state during operation.

3. The bionic composite low-frequency anti-overturning vibration isolator according to claim 1, characterized in that: The angle α between the first tension spring and the corresponding side of the rhombus hinge satisfies ; The second tension spring and the third tension spring are symmetrically arranged relative to the first tension spring; The second tension spring is hinged to the second platform, and the third tension spring is hinged to the first platform; The angle between the second tension spring and the second platform satisfy: ; The angle between the third tension spring and the first platform satisfy: .

4. The bionic composite low-frequency anti-overturning vibration isolator according to claim 1, characterized in that: A plurality of mounting holes are symmetrically arranged on each side of the rhombus hinge, and a tension spring is installed between the mounting hole and the corresponding first platform or second platform.

5. The bionic composite low-frequency anti-overturning vibration isolator according to claim 1, characterized in that: Polyurethane foam is sprayed around the position connected to the linear motor or the third tension spring on the first platform, and holes are punched around the position according to the set hole diameter and perforation rate to form a perforated plate resonance sound absorbing material.

6. A bionic composite low-frequency anti-overturning vibration isolator system, characterized in that: The bionic composite low-frequency anti-overturning vibration isolators described in any one of claims 1 to 5 are repeatedly arranged according to a set rule; the second platforms of two adjacent bionic composite low-frequency anti-overturning vibration isolators are connected by a hinge or a universal joint.

7. A vibration isolation method for the bionic composite low-frequency anti-overturning vibration isolator according to any one of claims 1 to 5, characterized in that: include: Simulate leg skeletal muscles and joints through bionic skeletal muscle vibration isolation components; The distance between the first platform and the second platform is adjusted by a linear motor, thereby changing the pre-stretching amount of the first stretching spring, and then changing the stiffness and posture of the bionic skeletal muscle vibration isolation component; the diamond structure has an upward supporting force by adjusting the stiffness of the second stretching spring and the third stretching spring; the linear motors of the two sets of vibration isolation units work independently, and can control the second platform to always remain horizontal whether the base of the vibration isolation object is horizontal or uneven; The bionic fat damping component simulates the multiple layers of subcutaneous fat to suppress vibration resonance and lateral shear vibration.

Images