CN116907781A - An integrated experimental platform for micro-vibration simulation and active and passive vibration isolation - Google Patents

Abstract

The utility model relates to the technical field of ground micro-vibration experimental testing equipment, in particular to a micro-vibration simulation and active-passive vibration isolation integrated experimental platform, which comprises a detection platform, an elastic supporting unit, a structural supporting unit and a vibration unit, wherein one end of the elastic supporting unit is connected with the structural supporting unit, and the other end of the elastic supporting unit is connected with the detection platform; the vibrating end of the vibrating unit is connected with the detection platform, and the fixed end of the vibrating unit is connected with the structural support unit; the bottom of the structural support unit is fixedly connected with the ground. The integrated experimental platform has a simple and compact structure, can realize gravity balance through the elastic supporting unit, can passively inhibit ground vibration while providing the function of gravity balance, and can provide active vibration isolation and micro-vibration simulation functions through the vibration unit, so that an experimental system is greatly simplified.

Description

An integrated experimental platform for micro-vibration simulation and active and passive vibration isolation

Technical field

The invention relates to the technical field of ground micro-vibration experimental testing equipment, and in particular to an experimental platform integrating micro-vibration simulation and active and passive vibration isolation.

Background technique

With the increasing requirements for image resolution and image quality of remote sensing satellites, micro-vibrations generated by various moving mechanisms in remote sensing satellites have become the main reason affecting stability. Therefore, accurate and comprehensive ground micro-vibration experiments are very necessary. At present, micro-vibration ground experiments are generally completed by a combination of vibration simulation system and vibration isolation system. This method is not only difficult to install, but also takes up ground space. At the same time, too many mechanisms will introduce multiple modes that affect the experiment. Therefore, it is necessary to design an integrated experimental platform to simplify experiments. Among the existing technologies, the following technologies have disclosed an integrated experimental platform:

1. The Chinese patent publication number is CN112880953A, the publication date is 2021-06-01, and the invention patent application titled "A vibration test device and a vibration test method" discloses a vibration test device, including a main support frame , a carrier assembly, a gravity compensation assembly and a carrier drive assembly, and the carrier drive assembly includes a first drive assembly and a second drive assembly. The technical solution disclosed in this reference document can perform six-direction vibration simulation experiments, but its structure is relatively complex, and it does not consider the installation of relevant vibration isolation components to isolate the vibration generated during the experiment.

2. The Chinese patent publication number is CN113218605A. The publication date is 2021-08-06. The invention patent application titled "A movable ultra-low vibration large-scale equipment test platform" discloses a movable ultra-low vibration large-scale equipment. Test platform. The test platform includes a drawbar, a wheel bracket, a middle installation frame, an upper vibration reduction installation platform and two counterweight blocks. The middle installation frame is set on the wheel bracket, and the upper vibration reduction installation platform is set on the middle installation. In the middle of the frame, a counterweight block is placed on each side of the middle-layer installation frame. The device under test is placed on the upper vibration-absorbing installation platform. The drawbar and wheel bracket enable the movement of the test platform.

3. The Chinese patent announcement number is CN212228697U, and the announcement date is 2020-12-25. The patent is a utility model patent application titled "A rotary tribological behavior simulation test bench that realizes vibration decoupling", which discloses a method to realize vibration decoupling. The decoupled rotating tribological behavior simulation test bench includes the test bench base, lower friction specimen, upper friction specimen, rotation system, loading system, acceleration sensor and three-way force sensor.

Although the above comparison documents can realize multi-directional vibration simulation experiments, the disclosed technical solutions involve a relatively complex structure, and do not consider the installation of relevant vibration isolation components to isolate the vibration generated during the experiment. To sum up, how to propose an integrated experimental platform with a relatively simple and compact structure, vibration isolation and active vibration isolation in this field is an urgent problem that needs to be solved.

Contents of the invention

In order to solve the above problems, the present invention provides an experimental platform integrating micro-vibration simulation and active and passive vibration isolation. The platform has a simple and compact structure and can achieve gravity balance through an elastic support unit. While providing the function of gravity balance, it can reduce ground vibration. It performs passive suppression and at the same time provides active vibration isolation and micro-vibration simulation functions through the vibration unit, which greatly simplifies the experimental system.

In order to achieve the above objectives, the present invention proposes the following technical solution: an integrated experimental platform for micro-vibration simulation and active and passive vibration isolation, including a detection platform, an elastic support unit, a structural support unit and a vibration unit. One end of the elastic support unit is connected to the structural support The unit is connected, the other end of the elastic support unit is connected to the detection platform; the vibration end of the vibration unit is connected to the detection platform, the fixed end of the vibration unit is connected to the structural support unit; the bottom of the structural support unit is fixedly connected to the ground;

The elastic support unit includes an air bag, an angle seat 1 and an air pump. One end of the air bag is connected to the support seat 1, and the other end of the air bag is connected to the diagonal side of the detection platform through the corner seat 1; the air pump is connected to the air bag through a pipeline;

The structural support unit includes a support base one and a support base two. The support base one is connected to the elastic support unit, and the support base two is connected to the vibration unit;

The vibration unit includes an x-direction voice coil motor, a z-direction voice coil motor, a y-direction voice coil motor and an angle base. The fixed ends of the x-direction voice coil motor, z-direction voice coil motor and y-direction voice coil motor are all connected to the support base. 2, the vibration ends of the x-direction voice coil motor, the z-direction voice coil motor and the y-direction voice coil motor are connected to the diagonal side surfaces 2 of the detection platform through the corner seats 2.

Further, there are four groups of elastic support units, support seats one, two support seats and vibration units; the detection platform is a cuboid marble platform, one end of the elastic support unit is connected to the diagonal side of the detection platform, and the vibration unit is connected to the detection platform. The two sides of the platform are connected at the diagonal corners.

Further, the top of the second supporting base is a carrying platform, and the x-direction voice coil motor, z-direction voice coil motor and y-direction voice coil motor are arranged in sequence and their respective fixed ends are connected to the carrying platform.

Further, the x-direction voice coil motor includes a motor body, an x-direction fixed seat and an x-direction vibration connection seat. The mover of the motor body is connected to the x-direction vibration connection seat and transmits the output force of the motor to the bearing platform. The x-direction fixed seat The base is connected with the supporting base two.

Further, the z-direction voice coil motor includes a motor body, a z-direction fixed seat and a z-direction vibration connection seat. The mover of the motor body is connected to the z-direction vibration connection seat and transmits the output force of the motor to the bearing platform. The z-direction fixed seat The base is connected with the supporting base two.

Further, the y-direction voice coil motor includes a motor body, a y-direction fixed seat and a y-direction vibration connection seat. The mover of the motor body is connected to the y-direction vibration connection seat and transmits the output force of the motor to the bearing platform. The y-direction fixed seat The base is connected with the supporting base two.

Further, an acceleration sensor is connected to the second corner base.

Compared with the existing technology, the present invention can achieve the following beneficial effects:

1. The integrated experimental platform in the present invention has a simple and compact structure, can achieve gravity balance through elastic support units, and passively suppress ground vibrations.

2. The vibration unit in the present invention can provide active vibration isolation and micro-vibration simulation functions at the same time, which greatly simplifies the experimental system.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of an integrated detection platform provided according to an embodiment of the present invention;

Figure 2 is a schematic structural diagram of a vibration unit provided according to an embodiment of the present invention.

Reference signs: detection platform 1, elastic support unit 2, air bag 21, corner seat 1 22, air pump 23, structural support unit 3, support seat 1 31, support seat 2 32, bearing platform 32a, vibration unit 4, x-direction sound Coil motor 41, x-direction fixed seat 411, x-direction vibration connection seat 412, z-direction voice coil motor 42, z-direction fixed seat 421, z-direction vibration connection seat 422, y-direction voice coil motor 43, y-direction fixed seat 431, Y-direction vibration connection base 432, corner base 2 44, acceleration sensor 7, diagonal side side 1 8, diagonal side side 2 9, motor body 10.

Detailed ways

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings 1-2. In the following description, the same modules are designated with the same reference numerals. In the case of the same reference numerals, their names and functions are also the same. Therefore, its detailed description will not be repeated.

In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings 1-2 and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and do not constitute limitations of the present invention.

As shown in Figure 1, an integrated experimental platform for micro-vibration simulation and active and passive vibration isolation includes a detection platform 1, an elastic support unit 2, a structural support unit 3 and a vibration unit 4. One end of the elastic support unit 2 is connected to the structural support unit 3 connection, the other end of the elastic support unit 2 is connected to the detection platform 1; the vibration end of the vibration unit 4 is connected to the detection platform 1, the fixed end of the vibration unit 4 is connected to the structural support unit 3; the bottom of the structural support unit 3 is fixed to the ground connect.

The elastic support unit 2 includes an air bag 21, a corner seat 22 and an air pump 23. One end of the air bag 21 is connected to the support seat 31, and the other end of the air bag 21 is connected to the diagonal side surface 8 of the detection platform 1 through the corner seat 22. ; The air pump 23 is connected to the air bag 21 through a pipeline. The structural support unit 3 includes a first support base 31 and a second support base 32 . The first support base 31 is connected to the elastic support unit 2 , and the second support base 32 is connected to the vibration unit 4 .

As shown in Figure 2, the vibration unit 4 includes an x-direction voice coil motor 41, a z-direction voice coil motor 42, and a y-direction voice coil motor 43. The x-direction voice coil motor 41, the z-direction voice coil motor 42, and the y-direction voice coil motor The fixed ends of 43 are all connected to the support base 2 32, and the vibration ends of the x-direction voice coil motor 41, the z-direction voice coil motor 42 and the y-direction voice coil motor 43 are connected to the diagonal side of the detection platform 1 through the second corner seat 44. 29 on. The x-direction voice coil motor 41, the z-direction voice coil motor 42 and the y-direction voice coil motor 43 are installed between the support base 2 32 and the detection platform 1. Through the acceleration sensor 7 on the detection platform 1, a feedback system is formed to control the experimental platform. Perform active vibration isolation and micro-vibration simulations. The top of the second supporting base 32 is a carrying platform 32a. The x-direction voice coil motor 41, the z-direction voice coil motor 42 and the y-direction voice coil motor 43 are arranged in sequence and their respective fixed ends are connected to the carrying platform 32a.

In this embodiment, the detection platform 1 carries the test piece, the elastic support unit 2 can be used as a passive vibration suppression device to isolate micro-vibrations generated on the ground during the experiment, and the structural support unit 3 serves as a gravity bearing device to bear the detection platform 1 In addition to the gravity load of the tested piece, the elastic support unit 2 is connected between the detection platform 1 and the structural support unit 3 to isolate the ground micro-vibration suffered by the detection platform 1. The micro-vibration generated by the vibration unit 4 can be transmitted to the detection platform 1 to provide micro-vibration simulation for the device under test, and at the same time, the micro-vibration transmitted from the ground to the detection platform 1 is actively suppressed.

The first support base 31 and the second support base 32 are independent of each other and independently support and fix the elastic support unit 2 and the vibration unit 4 respectively, so that the active vibration isolation and vibration transmission of the vibration unit 4 and the elastic support unit 2 do not affect each other. In this embodiment, the first support base 31 and the second support base 32 are both square cylinders, the top of which is a platform carrying the elastic support unit 2 or the vibration unit 4, and the bottom is fixedly connected to the ground.

As shown in Figure 1, there are four groups of elastic support unit 2, support base one 31, support base two 32, and vibration unit 4; the detection platform 1 is a rectangular marble platform structure, and one end of the elastic support unit 2 is connected to the detection platform 1 The diagonal side surfaces 1 and 8 are connected, and the vibration unit 4 is connected to the diagonal side surfaces 2 and 9 of the detection platform 1 .

As the detection platform 1, the marble platform can carry the test piece. The marble platform can have an array of bolt holes to facilitate the installation and fixation of the test piece. In this embodiment, the first support base 31, the second support base 32, the elastic support unit 2, and the vibration unit 4 are The connections to the detection platform 1 are placed on the diagonal sides of the marble platform, so that the vibration of the vibration unit 4 has a maximum vibration moment when transmitted to the detection platform 1, and also allows the elastic support unit 2 to have a better vibration isolation effect. .

In this embodiment, the air bag 21 is installed between the support base 31 and the detection platform 1. The external air pump 23 inflates high-pressure gas into the air bag 21, and the detection platform 1 is floated under the action of the air pressure to balance the detection platform 1. of gravity. At this time, the support base 31, the air bag 21, and the detection platform 1 are arranged in series to form a passive vibration isolation system of the experimental platform. Those skilled in the art can replace the airbag 21 with a spring damper group to achieve elastic vibration isolation effect according to actual conditions.

The top of the second supporting base 32 is a square column platform, and supporting bases are installed on the left and right sides. The x-direction voice coil motor 41, the z-direction voice coil motor 42, and the y-direction voice coil motor 43 are arranged in sequence to make the structure of this part compact. As shown in Figure 2, the x-direction voice coil motor 41 includes a motor body 10, an x-direction fixed seat 411 and an x-direction vibration connection seat 412. The mover of the motor body 10 is connected to the x-direction vibration connection seat 412 and the output force of the motor is It is transferred to the bearing platform 32a, and the x-direction fixed base 411 is connected to the second support base 32. The z-direction voice coil motor 42 includes a motor body 10, a z-direction fixed seat 421 and a z-direction vibration connection seat 422. The mover of the motor body 10 is connected to the z-direction vibration connection seat 422 and transmits the output force of the motor to the bearing platform 32a. , the z-direction fixed base 421 is connected to the second support base 32. The y-direction voice coil motor 43 includes a motor body 10, a y-direction fixed seat 431 and a y-direction vibration connection seat 432. The mover of the motor body 10 is connected to the y-direction vibration connection seat 432 and transmits the output force of the motor to the bearing platform 32a. The y-direction fixed base 431 is connected to the second supporting base 32 .

In this embodiment, the fixed base and the vibration connecting base in all directions have similar structural designs. Taking the x-direction holder 411 as an example, the two ends of the motor body 10 are fixedly connected to the x-direction holder 411. The connection end is connected along the x-direction. Since the x-direction vibration connection seat 412 is connected to the mover of the motor body 10, Therefore, when the mover of the motor body 10 vibrates slightly, it is fixed along the x direction by the x-direction fixed seat 411, so the vibration is transmitted to the detection platform 1 in the x-direction by the x-direction vibration connection seat 412. The rest of the vibration transmission in the y direction and z direction are similar and will not be described again.

As shown in Figure 1, the acceleration sensor 7 is connected to the second corner seat 44. When the x-direction voice coil motor 41, the z-direction voice coil motor 42, and the y-direction voice coil motor 43 are driven to generate vibration, a feedback system is formed through the acceleration sensor 7 to perform active vibration isolation and micro-vibration simulation on the experimental platform.

It should be understood that various forms of the process shown above may be used, with steps reordered, added or deleted. For example, each step described in the disclosure of the present invention can be executed in parallel, sequentially, or in a different order. As long as the desired results of the technical solution disclosed in the present invention can be achieved, there is no limitation here.

The above-mentioned specific embodiments do not constitute a limitation on the scope of the present invention. It will be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions are possible depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims (7)

1. The micro-vibration simulation and active-passive vibration isolation integrated experimental platform is characterized by comprising a detection platform (1), an elastic support unit (2), a structural support unit (3) and a vibration unit (4), wherein one end of the elastic support unit (2) is connected with the structural support unit (3), and the other end of the elastic support unit (2) is connected with the detection platform (1); the vibrating end of the vibrating unit (4) is connected with the detection platform (1), and the fixed end of the vibrating unit (4) is connected with the structural support unit (3); the bottom of the structural support unit (3) is fixedly connected with the ground;

the elastic supporting unit (2) comprises an air bag (21), a first corner seat (22) and an air pump (23), one end of the air bag (21) is connected with the first supporting seat (31), and the other end of the air bag (21) is connected to a first diagonal side surface (8) of the detection platform (1) through the first corner seat (22); the air pump (23) is connected with the air bag (21) through a pipeline;

the structural support unit (3) comprises a first support seat (31) and a second support seat (32), the first support seat (31) is connected with the elastic support unit (2), and the second support seat (32) is connected with the vibration unit (4);

the vibration unit (4) comprises an x-direction voice coil motor (41), a z-direction voice coil motor (42), a y-direction voice coil motor (43) and a second angle seat (44), wherein fixed ends of the x-direction voice coil motor (41), the z-direction voice coil motor (42) and the y-direction voice coil motor (43) are connected to the second support seat (32), and vibration ends of the x-direction voice coil motor (41), the z-direction voice coil motor (42) and the y-direction voice coil motor (43) are connected to a second diagonal side surface (9) of the detection platform (1) through the second angle seat (44).

2. The integrated experimental platform for micro-vibration simulation and active-passive vibration isolation according to claim 1, wherein the elastic supporting unit (2), the first supporting seat (31), the second supporting seat (32) and the vibration unit (4) are provided with four groups; the detection platform (1) is a cuboid marble platform, one end of the elastic supporting unit (2) is connected with a first side surface (8) at the opposite angle of the detection platform (1), and the vibration unit (4) is connected with a second side surface (9) at the opposite angle of the detection platform (1).

3. The integrated experimental platform for micro-vibration simulation and active-passive vibration isolation according to claim 2, wherein the top of the second supporting seat (32) is provided with a bearing platform (32 a), the x-direction voice coil motor (41), the z-direction voice coil motor (42) and the y-direction voice coil motor (43) are sequentially arranged, and the fixed ends of the two voice coil motors are connected to the bearing platform (32 a).

4. The integrated experimental platform for micro-vibration simulation and active-passive vibration isolation according to claim 3, wherein the x-direction voice coil motor (41) comprises a motor body (10), an x-direction fixing seat (411) and an x-direction vibration connecting seat (412), a rotor of the motor body (10) is connected with the x-direction vibration connecting seat (412) and transmits output force of the motor to the bearing platform (32 a), and the x-direction fixing seat (411) is connected with the second supporting seat (32).

5. The integrated micro-vibration simulation and active-passive vibration isolation experimental platform according to claim 4, wherein the z-direction voice coil motor (42) comprises a motor body (10), a z-direction fixing seat (421) and a z-direction vibration connecting seat (422), a rotor of the motor body (10) is connected with the z-direction vibration connecting seat (422) and transmits output force of the motor to the bearing platform (32 a), and the z-direction fixing seat (421) is connected with the second supporting seat (32).

6. The integrated experimental platform for micro-vibration simulation and active-passive vibration isolation according to claim 5, wherein the y-direction voice coil motor (43) comprises a motor body (10), a y-direction fixing seat (431) and a y-direction vibration connecting seat (432), a rotor of the motor body (10) is connected with the y-direction vibration connecting seat (432) and transmits output force of the motor to the bearing platform (32 a), and the y-direction fixing seat (431) is connected with the second supporting seat (32).

7. The integrated experimental platform for micro-vibration simulation and active-passive vibration isolation according to claim 6, wherein an acceleration sensor (7) is connected to the second corner seat (44).