A large thrust electric vibration table anti-unbalance load adjusting device

Abstract

The application discloses a large-thrust electric vibration table anti-unbalanced load adjusting device, which comprises a table body, a supporting platform connected to the upper part of the table body through a lifting cylinder, a first moving platform capable of moving horizontally connected to the supporting platform through a first moving platform assembly, a second moving platform capable of moving longitudinally connected to the first moving platform through a second moving platform assembly, four weighing sensors arranged in a square shape with the center line of the second moving platform as the center arranged on the second moving platform, a detection object placing platform mounted on the upper part of the weighing sensors, and a moving coil arranged at the center of the table body, wherein the upper part of the moving coil is sequentially connected with the detection object placing platform through the supporting platform, the first moving platform, the second moving platform and the detection object placing platform, so that the weight and the gravity center position of the measured object can be detected, and the gravity center position can be automatically adjusted to the center line of the moving coil, thereby avoiding the unbalanced load phenomenon.

Description

Technical Field

[0001] This invention relates to the technical field of vibration testing devices in environmental mechanics testing, specifically to a high-thrust electric vibration table anti-eccentric load adjustment device. Background Technology

[0002] The off-center loading moment is crucial for the safety of vibration tests on large and medium-sized test objects. During vibration tests on such objects, due to the asymmetry of the object's structure and the non-uniformity of its mass distribution, it is difficult for the object's center of gravity to coincide with the central axis of the moving coil of the vibration table. This leads to off-center loading in actual use, generating an off-center loading moment. During vertical excitation, the off-center loading moment caused by the deviation of the test component's center of gravity from the vibration axis acts on the vibration table system, causing the table surface to wobble and vibrate, resulting in distorted vibration waveforms and destructive forces on the vibration table system. This is especially true for high-frequency, high-thrust electric vibration tables, where high-cycle fatigue leads to even greater off-center loading moments. The off-center loading phenomenon caused by the shift in the center of gravity is more severe, potentially leading to test failure or other safety hazards. Therefore, high-frequency, high-thrust electric vibration tables urgently need a device that can automatically adjust the relative position of the test object's center of gravity and the moving coil's central axis to ensure that the test object's center of gravity coincides with the moving coil's central axis before vibration, thus preventing off-center loading. Summary of the Invention

[0003] To address the aforementioned technical shortcomings, the purpose of this invention is to provide a high-thrust electric vibration table anti-eccentricity adjustment device that can detect the weight and center of gravity position of the tested object and automatically adjust the center of gravity position to the center line of the moving coil to avoid eccentricity.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] This invention provides a high-thrust electric vibration table anti-eccentricity adjustment device, comprising a table body, a support platform connected to the upper part of the table body via a lifting cylinder, a first moving platform capable of lateral movement connected to the support platform via a first moving platform assembly, a second moving platform capable of longitudinal movement connected to the first moving platform via a second moving platform assembly, four weighing sensors arranged in a square with the center line of the second moving platform as the center, a detection object placement platform mounted on the upper part of the weighing sensors, the support platform, the first moving platform, the second moving platform, and the detection object placement platform being aligned with the center line, a moving coil disposed at the center of the table body, the upper part of the moving coil sequentially passing through the support platform, the first moving platform, and the second moving platform and connecting to the detection object placement platform, and the weighing sensors, the first moving platform assembly, and the second moving platform assembly being electrically connected to a controller.

[0006] Preferably, the support platform, the first moving platform, the second moving platform, and the object placement platform are disc-shaped structures, and the center of the support platform, the first moving platform, and the second moving platform is provided with a through hole corresponding to the moving coil.

[0007] Preferably, the lifting cylinder includes four lifting cylinders arranged at 90-degree intervals along the center line of the support platform.

[0008] Preferably, the first mobile platform assembly includes a ball screw mechanism and two parallel, transversely arranged X-axis guide rails. A slider fixed to the bottom of the first mobile platform is mounted on the X-axis guide rails. The ball screw mechanism includes a ball screw mounted on a support platform and a first motor connected to the ball screw. A nut fixed to the bottom of the first mobile platform is mounted on the ball screw. The ball screw is parallel to the X-axis guide rails. A nut seat is formed on the nut. Both ends of the ball screw are fixed to the support platform through a support seat and a fixed seat.

[0009] Preferably, the second moving platform assembly includes a ball screw mechanism and two parallel Y-axis guide rails arranged longitudinally. A slider fixed to the bottom of the second moving platform is mounted on the Y-axis guide rails. The ball screw mechanism includes a ball screw mounted on the first moving platform and a second motor connected to the ball screw. A nut fixed to the bottom of the second moving platform is mounted on the ball screw. The ball screw is parallel to the Y-axis guide rails. A nut seat is formed on the nut. Both ends of the ball screw are fixed to the first moving platform through a support seat and a fixed seat.

[0010] Preferably, the center of the test object placement platform is provided with a second through hole corresponding to the moving coil, and a support frame arranged in a cross shape is provided in the second through hole. The support frame arranged in a cross shape has a square through hole at its center. The platform of the moving coil is provided with a cross groove corresponding to the support frame and a protrusion corresponding to the square through hole.

[0011] The present invention also provides a method of using the above-mentioned device, comprising the following steps:

[0012] Before the vibration table starts working, the lifting cylinder starts working. The piston rod of the lifting cylinder pushes the support platform to rise vertically along the center line of the moving coil. The support platform drives the first moving platform, the second moving platform and the test object placement platform to rise vertically. When the bottom of the support frame of the test object placement platform is higher than the table surface of the protrusion of the moving coil, the lifting cylinder stops working.

[0013] The object to be tested is placed in the center of the cross-shaped support frame of the testing platform. The load cells located below the testing platform begin to operate. Each of the four load cells is connected to an AD signal encoder via signal cables. The AD signal encoder transmits the digitized load cell signals to a computer via signal cables or wirelessly. The computer processes and calculates the received four sensor signals to determine the weight and center of gravity of the object. The specific calculation method is as follows:

[0014] Four load cells are placed at the four corners of a square. Let the side length of the square be 4L. Establish a coordinate system with the X-axis pointing towards the guide rail, the Y-axis pointing towards the guide rail, and the Z-axis pointing towards the center line of the moving coil. Let the center of gravity of the object being measured be (X0, Y0). If the four gravity signals output by the load cells are F1, F2, F3, and F4, then the center of gravity coordinates (X0, Y0) of the object being measured are calculated using the following formula:

[0015]

[0016] When the center of gravity of the object being measured does not coincide with the center line of the moving coil, i.e., X0 or Y0 is not zero, start the first motor or the second motor to adjust the distance deviation between the center of gravity of the object being measured and the center line of the moving coil. The distance between the center of gravity of the object being measured along the X-axis and the center line of the moving coil is set as d1, which is the corresponding X0 value. The distance between the center of gravity of the object being measured along the Y-axis and the center line of the moving coil is set as d2, which is the corresponding X1 value. Start the first motor, and drive the horizontal ball screw to rotate through the rotation of the coupling, which in turn drives the nut to move a distance d1 along the X-axis. The direction of movement is the X-axis direction to eliminate the deviation. The nut drives the first moving platform to move a distance d1 along the X-guide rail. The first moving platform drives the test object placement platform to move a distance d1 along the X-guide rail, thus completing the adjustment of the center of gravity of the object being measured 11 relative to the center line of the moving coil in the X direction.

[0017] Start the second motor, and drive the longitudinal ball screw two to rotate through the rotation of the coupling, which in turn drives the nut two to move a distance d2 along the Y-axis. The moving direction is the Y-axis direction to eliminate deviation. The nut two drives the second moving platform to move a distance d2 along the Y-guide rail. The second moving platform drives the test object placement platform to move a distance d2 along the Y-guide rail, thus completing the adjustment of the center of gravity of the test object relative to the center line of the moving coil in the Y direction.

[0018] After the center of gravity of the object being tested is adjusted and coincides with the center line of the moving coil, the first motor and the second motor stop working, and the lifting cylinder starts working. The piston rod of the lifting cylinder drives the support platform to descend vertically along the center line of the moving coil. The support platform drives the first moving platform, the second moving platform and the object placement platform to descend vertically. When the bottom of the support frame (1002) of the object placement platform contacts the bottom surface of the cross groove of the moving coil, the object being tested contacts the platform surface of the protrusion (102) of the moving coil. The lifting cylinder stops working and the vibration table starts working.

[0019] The beneficial effects of this invention are as follows:

[0020] This invention has a simple structure and is easy to use and control. It can automatically adjust the center of gravity of the test object to the center line of the moving coil by detecting the weight and center of gravity of the test object, thus avoiding the phenomenon of off-center loading. It can also avoid the situation where the vibration table surface shakes and vibrates due to off-center loading, which would cause the vibration table system to be damaged due to the distortion of the vibration waveform. This is conducive to better vibration testing. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional structural schematic diagram of an anti-eccentric load adjustment device for a high-thrust electric vibration table according to the present invention.

[0023] Figure 2 This is a three-dimensional exploded structural diagram of an anti-eccentric load adjustment device for a high-thrust electric vibration table according to the present invention.

[0024] Figure 3 This is a schematic diagram of the center-of-gravity position adjustment device for an anti-eccentric load adjustment device of a high-thrust electric vibration table according to the present invention.

[0025] Figure 4 This is a three-dimensional structural diagram of the ball screw and motor in the anti-eccentric load adjustment device of a high-thrust electric vibration table according to the present invention.

[0026] Figure 5 This is a schematic diagram of the detection object placement platform and the moving coil of the anti-eccentric load adjustment device for a high-thrust electric vibration table according to the present invention.

[0027] In the diagram: 1. Moving coil; 101. Cross groove; 102. Raised platform; 2. Platform body; 3. Lifting cylinder; 4. Support platform; 5. First moving platform; 6. First moving platform assembly; 61. X-axis guide rail; 62. Ball screw one; 63. First motor; 64. Slider one; 65. Nut one; 66. Nut seat one; 67. Support seat one; 68. Fixed seat one; 7. Second moving platform; 8. Second moving platform assembly; 81. Y-axis guide rail; 82. Ball screw two; 83. Second motor; 84. Slider two; 85. Nut two; 86. Nut seat two; 87. Support seat two; 88. Fixed seat two; 9. Weighing sensor; 10. Detection object placement platform; 1001. Through hole two; 1002. Support frame; 1003. Square through hole; 11. Measured object; 12. Center line of moving coil; 13. Center of gravity of measured object; 14. Coupling. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] like Figures 1 to 5 As shown, this embodiment provides a high-thrust electric vibration table anti-eccentric load adjustment device. The device includes a table body 2, with a support platform 4 connected to the upper part of the table body 2 via a lifting cylinder 3. The support platform 4 is connected to a first moving platform 5 capable of lateral movement via a first moving platform assembly 6. The first moving platform 5 is connected to a second moving platform 7 capable of longitudinal movement via a second moving platform assembly 8. Four weighing sensors 9 are arranged in a square around the centerline of the second moving platform 7 on the second moving platform 7. A detection object placement platform 10 is installed above each weighing sensor 9. The support platform 4, the first moving platform 5, the second moving platform 5, the second moving platform 5, the third moving platform 5, and the fourth moving platform 6 are connected to a first moving platform 5 capable of lateral movement via a first moving platform assembly 6. The first mobile platform 5, the second mobile platform 7, and the detection object placement platform 10 are arranged along the same center line. A moving coil 1 is arranged at the center of the platform 2. The upper part of the moving coil 1 passes through the support platform 4, the first mobile platform 5, and the second mobile platform 7 in sequence and connects to the detection object placement platform 10. The weighing sensor 9, the first mobile platform assembly 6, and the second mobile platform assembly 8 are electrically connected to the controller. In this embodiment, the weighing sensor 9, the first mobile platform assembly 6, the second mobile platform assembly 8, and the controller are existing products or mechanisms well known to those skilled in the art, and the control connection method between them also adopts existing control connection methods well known to those skilled in the art, which will not be described in detail here.

[0030] The support platform 4, the first moving platform 5, the second moving platform 7, and the detection object placement platform 10 are disc-shaped structures. The support platform 4, the first moving platform 5, and the second moving platform 7 have through holes at their centers corresponding to the moving coil 1. The lifting cylinder 3 includes four lifting cylinders arranged at 90-degree intervals along the centerline of the support platform 4.

[0031] The first mobile platform assembly 6 includes a ball screw mechanism and two parallel, transversely arranged X-axis guide rails 61. A slider 64 fixed to the bottom of the first mobile platform 5 is mounted on the X-axis guide rails 61. The ball screw mechanism includes a ball screw 62 mounted on the support platform 4 and a first motor 63 connected to the ball screw 62. A nut 65 fixed to the bottom of the first mobile platform 5 is mounted on the ball screw 62. The ball screw 62 is parallel to the X-axis guide rails 61. A nut seat 66 is formed on the nut 65. Both ends of the ball screw 62 are fixed to the support platform 4 through a support seat 67 and a fixed seat 68.

[0032] The second moving platform assembly 8 includes a ball screw mechanism and two parallel Y-rails arranged longitudinally. A slider 84 fixed to the bottom of the second moving platform 7 is mounted on the Y-rails 81. The ball screw mechanism includes a ball screw 82 mounted on the first moving platform 5 and a second motor 83 connected to the ball screw 82. A nut 85 fixed to the bottom of the second moving platform 7 is mounted on the ball screw 82. The ball screw 82 is parallel to the Y-rails 81. A nut seat 86 is formed on the nut 85. Both ends of the ball screw 82 are fixed to the first moving platform 5 through a support seat 87 and a fixed seat 88. The detection object placement platform 10 has a through hole 1001 at its center, corresponding to the moving coil 1. A support frame 1002 arranged in a cross shape is provided in the through hole 1001. A square through hole 1003 is formed in the center of the support frame 1002. The platform of the moving coil 1 has a cross groove 101 corresponding to the support frame 1002 and a protrusion 102 corresponding to the square through hole 1003. When the bottom of the support frame 1002 contacts the inner bottom surface of the cross groove 101, the upper surface of the support frame 1002 is flush with the upper surface of the protrusion 102.

[0033] In this embodiment, the components include: moving coil 1, cross groove 101, raised platform 102, platform body 2, lifting cylinder 3, support platform 4, first moving platform 5, first moving platform assembly 6, X-axis guide rail 61, ball screw 1 62, first motor 63, slider 1 64, nut 1 65, nut seat 1 66, support seat 1 67, fixed seat 1 68, second moving platform 7, second moving platform assembly 8, Y-axis guide rail 81, ball screw 2 82, second motor 83, slider 2 84, and nut 2 85. Nut seat 2 86, support seat 2 87, fixed seat 2 88, weighing sensor 9, object placement platform 10, through hole 2 1001, support frame 1002, square through hole 1003, object to be measured 11, moving coil center line 12, object to be measured center of gravity 13, coupling 14, and controller all adopt existing products or structures known to those skilled in the art, and their interconnection or control methods also adopt existing connection or control methods known to those skilled in the art, which will not be described in detail here.

[0034] The method of using the above-mentioned device includes the following steps:

[0035] 1. Before the vibration table starts working, the lifting cylinder 3 starts working. The piston rod of the lifting cylinder 3 pushes the support platform 4 to rise vertically along the center line of the moving coil 1. The support platform 4 drives the first moving platform 5, the second moving platform 7 and the test object placement platform 10 to rise vertically. When the bottom of the support frame 1002 of the test object placement platform 10 is higher than the table surface of the protrusion 102 of the moving coil 1, the lifting cylinder 3 stops working.

[0036] 2. The object to be tested 11 is placed at the center of the cross-shaped support frame 1002 of the object placement platform 10. The weighing sensors 9 located below the object placement platform 10 begin to operate. The four weighing sensors 9 are connected to the AD signal encoder via signal cables. The AD signal encoder transmits the digitized weighing sensor signals to the computer via signal cables or wirelessly. The computer processes and calculates the received four sensor signals to determine the weight and center of gravity of the object to be tested 11. The principle of measuring the center of gravity is based on torque balance. The force value measured by the weighing sensors 9 is converted into a length value to determine the relative position of the object to be tested 11 with respect to the center of gravity of the object placement platform 10. The specific calculation method is as follows:

[0037] Four load cells 9 are placed at the four corners of a square. The side length of the square is 4L. A coordinate system is established with the X-axis pointing towards the guide rail 61, the Y-axis pointing towards the guide rail, and the Z-axis pointing towards the center line of the moving coil 1. The coordinates of the center of gravity of the object being measured 11 are X0 and Y0. If the four gravity signals converted from the outputs of the four load cells 9 are F1, F2, F3, and F4, then the coordinates of the center of gravity of the object being measured 11, X0 and Y0, are calculated using the following formula:

[0038]

[0039] 3. When the center of gravity of the object under test 11 does not coincide with the center line of the moving coil 1, i.e., X0 or Y0 is not zero, start the first motor 63 or the second motor 83 to adjust the distance deviation between the center of gravity of the object under test 11 and the center line of the moving coil 1. The distance between the center of gravity of the object under test 11 along the X-axis and the center line of the moving coil 1 is set as d1, which is the corresponding X0 value. The distance between the center of gravity of the object under test 11 along the Y-axis and the center line of the moving coil 1 is set as d2, which is the corresponding X1 value. Start the first motor 63, and drive the transverse ball screw 62 to rotate through the rotation of the coupling 14, which in turn drives the nut 65 to move a distance d1 along the X-axis. The moving direction is the X-axis direction to eliminate the deviation. The nut 65 drives the first moving platform 5 to move a distance d1 along the X-guide rail 61. The first moving platform 5 drives the test object placement platform 10 to move a distance d1 along the X-guide rail 61, thus completing the adjustment of the center of gravity of the object under test 11 relative to the center line of the moving coil 1 in the X direction.

[0040] Start the second motor 83, which drives the longitudinal ball screw 82 to rotate through the rotation of the coupling 14, thereby driving the nut 85 to move a distance d2 along the Y-axis. The moving direction is the Y-axis direction to eliminate deviation. The nut 85 drives the second moving platform 7 to move a distance d2 along the Y-guide rail 81. The second moving platform 7 drives the test object placement platform 10 to move a distance d2 along the Y-guide rail 81, thus completing the adjustment of the center of gravity position of the test object 11 relative to the center line of the moving coil 1 in the Y direction.

[0041] 4. After the center of gravity of the test object 11 is adjusted, that is, after the center of gravity of the test object 11 coincides with the center line of the moving coil 1, the first motor 63 and the second motor 83 stop working, the lifting cylinder 3 starts working, the piston rod of the lifting cylinder 3 drives the support platform 4 to descend vertically along the center line of the moving coil 1, the support platform 4 drives the first moving platform 5, the second moving platform 7 and the test object placement platform 10 to descend vertically, when the bottom of the support frame 1002 of the test object placement platform 10 contacts the bottom surface of the cross groove 101 of the moving coil 1, the test object 11 contacts the table surface of the protrusion 102 of the moving coil 1, the lifting cylinder 3 stops working, and the vibration table starts working.

[0042] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A high-thrust electric vibration table anti-eccentric load adjustment device, characterized in that, The system includes a platform (2), on which a support platform (4) is connected via a lifting cylinder (3). The support platform (4) is connected via a first moving platform assembly (6) to a first moving platform (5) capable of lateral movement. The first moving platform (5) is connected via a second moving platform assembly (8) to a second moving platform (7) capable of longitudinal movement. Four weighing sensors (9) are arranged in a square with the center line of the second moving platform (7) as the center. A detection object placement platform (10) is installed on the upper part of the weighing sensors (9). The support platform (4), the first moving platform (5), the second moving platform (7), and the detection object placement platform (10) are arranged along the same center line. The center of the platform (2) is provided with a... The moving coil (1) is connected to the detection object placement platform (10) by passing through the support platform (4), the first moving platform (5), and the second moving platform (7) in sequence. The weighing sensor (9), the first moving platform assembly (6), and the second moving platform assembly (8) are electrically connected to the controller. The detection object placement platform (10) has a through hole (1001) corresponding to the moving coil (1) at its center. A support frame (1002) arranged in a cross shape is provided in the through hole (1001). A square through hole (1003) is formed in the center of the support frame (1002) arranged in a cross shape. A cross groove (101) corresponding to the support frame (1002) and a protrusion (102) corresponding to the square through hole (1003) are provided on the platform of the moving coil (1).

2. The anti-eccentric load adjustment device for a high-thrust electric vibration table as described in claim 1, characterized in that, The support platform (4), the first moving platform (5), the second moving platform (7), and the detection object placement platform (10) are disc-shaped structures. The support platform (4), the first moving platform (5), and the second moving platform (7) have through holes corresponding to the moving coil (1) at their centers.

3. The anti-eccentricity adjustment device for a high-thrust electric vibration table as described in claim 1, characterized in that, The lifting cylinder (3) includes four lifting cylinders arranged at 90-degree intervals along the center line of the support platform (4).

4. The anti-eccentric load adjustment device for a high-thrust electric vibration table as described in claim 1, characterized in that, The first mobile platform assembly (6) includes a ball screw mechanism and two parallel X-axis guide rails (61) arranged laterally. A slider (64) fixed to the bottom of the first mobile platform (5) is installed on the X-axis guide rails (61). The ball screw mechanism includes a ball screw (62) installed on the support platform (4) and a first motor (63) connected to the ball screw (62). A nut (65) fixed to the bottom of the first mobile platform (5) is installed on the ball screw (62). The ball screw (62) is arranged parallel to the X-axis guide rails (61). A nut seat (66) is formed on the nut (65). The two ends of the ball screw (62) are fixed to the support platform (4) through a support seat (67) and a fixed seat (68).

5. The anti-eccentric load adjustment device for a high-thrust electric vibration table as described in claim 1, characterized in that, The second moving platform assembly (8) includes a ball screw mechanism and two parallel Y-axis guide rails (81) arranged longitudinally. A slider (84) fixed to the bottom of the second moving platform (7) is installed on the Y-axis guide rails (81). The ball screw mechanism includes a ball screw (82) installed on the first moving platform (5) and a second motor (83) connected to the ball screw (82). A nut (85) fixed to the bottom of the second moving platform (7) is installed on the ball screw (82). The ball screw (82) is parallel to the Y-axis guide rails (81). A nut seat (86) is formed on the nut (85). The two ends of the ball screw (82) are fixed to the first moving platform (5) through a support seat (87) and a fixed seat (88).

6. The method of using the anti-eccentric load adjustment device for a high-thrust electric vibration table as described in any one of claims 1-5, characterized in that, Includes the following steps: Before the vibration table starts working, the lifting cylinder (3) starts working. The piston rod of the lifting cylinder (3) pushes the support platform (4) to rise vertically along the center line of the moving coil (1). The support platform (4) drives the first moving platform (5), the second moving platform (7) and the test object placement platform (10) to rise vertically. When the bottom of the support frame (1002) of the test object placement platform (10) is higher than the table surface of the protrusion (102) of the moving coil (1), the lifting cylinder (3) stops working. (2) The object to be tested (11) is placed at the center of the cross-shaped support frame (1002) of the object placement platform (10). The weighing sensors (9) located below the object placement platform (10) start working. The four weighing sensors (9) are connected to the AD signal encoder through signal cables. The AD signal encoder transmits the digitized weighing sensor signals to the computer through signal cables or wirelessly. The computer processes and calculates the received four sensor signals and calculates the weight and center of gravity of the object to be tested (11). The specific calculation method is as follows: Four load cells (9) are placed at the four corners of a square. The side length of the square is 4L. A coordinate system is established with the X-axis pointing to the guide rail (61), the Y-axis pointing to the guide rail, and the Z-axis pointing to the center line of the moving coil (1). The coordinates of the center of gravity of the object being measured (11) are (X0, Y0). If the four gravity signals output by the four load cells (9) are F1, F2, F3, and F4, then the coordinates of the center of gravity (X0, Y0) of the object being measured (11) are calculated using the following formula: , ； (3) When the center of gravity of the object under test (11) does not coincide with the center line of the moving coil (1), i.e., X0 or Y0 is not zero, start the first motor (63) or the second motor (83) to adjust the distance deviation between the center of gravity of the object under test (11) and the center line of the moving coil (1). The distance between the center of gravity of the object under test (11) along the X-axis and the center line of the moving coil (1) is set as d1, which is the corresponding X0 value. The distance between the center of gravity of the object under test (11) along the Y-axis and the center line of the moving coil (1) is set as d2, which is the corresponding X1 value. Start the first motor (63), and drive the horizontal ball screw (62) to rotate through the rotation of the coupling, thereby driving the nut (65) to move a distance d1 along the X-axis. The moving direction is the X-axis direction to eliminate the deviation. The nut (65) drives the first moving platform (5) to move a distance d1 along the X-guide rail (61). The first moving platform (5) drives the test object placement platform (10) to move a distance d1 along the X guide rail (61) to complete the X direction adjustment of the center position of the test object (11) relative to the center line of the moving coil (1); Start the second motor (83), and drive the longitudinal ball screw (82) to rotate through the rotation of the coupling, thereby driving the nut (85) to move a distance d2 along the Y-axis. The moving direction is the Y-axis direction to eliminate deviation. The nut (85) drives the second moving platform (7) to move a distance d2 along the Y-guide rail (81). The second moving platform (7) drives the test object placement platform (10) to move a distance d2 along the Y-guide rail (81), thus completing the Y-direction adjustment of the center position of the test object (11) relative to the center line of the moving coil (1). (4) After the center of gravity of the test object (11) is adjusted, that is, after the center of gravity of the test object (11) coincides with the center line of the moving coil (1), the first motor (63) and the second motor (83) stop working, the lifting cylinder (3) starts working, the piston rod of the lifting cylinder (3) drives the support platform (4) to descend vertically along the center line of the moving coil (1), the support platform (4) drives the first moving platform (5), the second moving platform (7) and the test object placement platform (10) to descend vertically, when the bottom of the support frame (1002) of the test object placement platform (10) contacts the bottom surface of the cross groove (101) of the moving coil (1), the test object (11) contacts the table surface of the protrusion (102) of the moving coil (1), the lifting cylinder (3) stops working, and the vibration table starts working.

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