CN114216637B - Multi-synchronous vibration test device and test method thereof - Google Patents
Multi-synchronous vibration test device and test method thereof Download PDFInfo
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- CN114216637B CN114216637B CN202111595658.8A CN202111595658A CN114216637B CN 114216637 B CN114216637 B CN 114216637B CN 202111595658 A CN202111595658 A CN 202111595658A CN 114216637 B CN114216637 B CN 114216637B
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- 238000012360 testing method Methods 0.000 title claims abstract description 114
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- 230000005284 excitation Effects 0.000 claims abstract description 40
- 230000001360 synchronised effect Effects 0.000 claims abstract description 25
- 238000004088 simulation Methods 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000005316 response function Methods 0.000 claims description 5
- 239000011159 matrix material Substances 0.000 claims description 3
- 230000006978 adaptation Effects 0.000 claims description 2
- 208000016261 weight loss Diseases 0.000 claims description 2
- 239000013585 weight reducing agent Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
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- 230000004584 weight gain Effects 0.000 abstract description 3
- 235000019786 weight gain Nutrition 0.000 abstract description 3
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- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000012356 Product development Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/025—Measuring arrangements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/06—Multidirectional test stands
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The application discloses a multi-synchronous vibration test device and a test method thereof, wherein the device comprises a simple foundation, a bracket, a tool and more than two vibrating tables, wherein the shape and the specification of the tool are set to be matched with an open cuboid container in which samples are compatible, the tool is arranged on the simple foundation through the bracket to form a main body vacation shape, and the bracket is provided with more than two replacement groups with more than two heights and volumes corresponding to various test directions of the samples and can be detachably and interchangeably arranged between the simple foundation and the tool; each vibration table is positioned and attached to a simple foundation according to the vibration excitation direction required by a sample test, is connected with a tool through a flexible rod, transmits vibration excitation, and synchronously outputs high-thrust combined vibration towards the sample. By applying the system, a synchronous vibration test system is formed by connecting a plurality of vibration tables with various thrusts through layout, so that the more comprehensive vibration test requirement of a test piece with increased volume and weight can be met; and the device adopts tooling to reversely install and receive excitation, thereby saving and reducing weight gain brought by the supporting structure.
Description
Technical Field
The application relates to a vibration test system, in particular to a system solution suitable for vibration test of samples developed in large volume and mass, and belongs to the field of electromechanical integration application.
Background
The vibration test has wide application in the aspects of scientific and technical progress, product development, quality tracking and design analysis of different industries. Particularly in various underwater detection equipment, spacecraft products and various packaging transportation, the respective accurate vibration resistance is obtained through a vibration test. It is well known that vibration tests are not a single-axis dynamic operation process, but are multi-axis development, so as to simulate the degree of stability of the product in practical use under various environments and various stresses in different directions. Although the test requirement of a part of samples can be met by using the single vibration table to match with the tool rotation, the test mode cannot meet the requirement after the three-dimensional improvement is required in the test direction.
In recent years, samples (also called test pieces in the industry) with vibration test requirements are developed in large volumes and large masses, and the related test requirements are more and more difficult to meet by the existing equipment. The standard vibration table commonly used in the market gradually reduces the vibration level which can be realized along with the increase of the volume and the mass of a sample, and even cannot meet the minimum test requirement.
Disclosure of Invention
The application aims to provide a plurality of synchronous vibration test devices and a test method thereof, which solve the vibration test requirements of a large-volume and heavy-weight sample.
The technical solution for achieving the above object of the present application is a multiple synchronous vibration test device, which is characterized in that: the device comprises a simple foundation, a bracket, a tool and more than two vibrating tables, wherein the appearance and the specification of the tool are set to be matched with an open cuboid container in which samples are compatible, the tool is arranged on the simple foundation through the bracket to form a main body vacation shape, and the bracket is provided with more than two replacement groups with more than two heights and volumes corresponding to various test directions of the samples and can be detachably and interchangeably arranged between the simple foundation and the tool; the sample is fixed with the frock through the triangle-plate at length direction both ends, and each shaking table is fixed a position according to the required excitation direction location of sample test and is attached on simple and easy ground to link to each other, transmit the excitation with the frock through flexible pole.
Further, corresponding to the sample vibration test of the tool height Y axial direction, at least two vibrating tables are connected to two ends of the tool in a distributed mode in the length direction, the tool is lapped on the support through the air bag group and is in roller type sliding fit along the Y axial direction, the assembling height of the tool through the support is higher than that of a moving coil of the vibrating table, the moving coil of each vibrating table is connected with a frame and a triangle at the end of the tool through a flexible rod, and Y axial excitation is output at the current point position.
Furthermore, a vibrating table for vibration compensation is also arranged between the vibrating tables arranged at the two ends of the tool, and a moving coil of the vibrating table is connected with the center of the bottom of the tool through a flexible rod and outputs Y-axis excitation at a connecting point.
Further, corresponding to a sample vibration test of the tool length X in the axial direction, at least two vibrating tables are connected to two ends of the tool in the length direction in a distributed mode and turn over 90 degrees towards the tool respectively, the tool is lapped on a support and is in sleeve-type sliding fit along the X in the axial direction, the tool is matched with an output central shaft of a moving coil of the vibrating table through the assembling height of the support, the moving coil of each vibrating table is connected with a frame at the end of the tool through a flexible rod, and the vibration excitation in the X axial direction is output at the current point position.
Furthermore, the vibrating tables arranged at the two ends of the tool are identical or different in number.
Further, corresponding frock width Z axial sample vibration test, at least two shaking tables distribute and attach in one side of frock width direction and all overturn 90 degrees towards the frock, frock overlap joint is on the support and along Z axial telescopic slip-fit, and frock opposite side frame supports the counter-force piece facade of establishing on simple and easy ground through the gasbag group, and the frock passes through the output center pin of the assembly height adaptation shaking table moving coil of support, and the moving coil of every shaking table passes through the flexible rod and connects frock lateral frame, exports Z axial excitation in current point position.
Further, corresponding to a sample vibration test of the width Z axial direction of the tool, at least two vibration tables are connected to two sides of the width direction of the tool in a distributed mode and turn over 90 degrees towards the tool respectively, the tool is lapped on a support and is in sleeve-type sliding fit along the Z axial direction, the tool is matched with an output central shaft of a moving coil of the vibration table through the assembling height of the support, the moving coil of each vibration table is connected with a lateral frame of the tool through a flexible rod, and vibration excitation of the Z axial direction is output at a current point position.
Further, the tool is formed by integrally welding an aluminum plate and an aluminum profile, and is subjected to partial hollowing and weight reduction treatment.
The technical solution for achieving the other object of the present application is that a method for testing multiple synchronous vibrations is achieved based on the device, and is characterized by comprising:
preparing a test, namely positioning and attaching 2-4 vibrating tables on a simple foundation according to the excitation direction required by a sample test, and loading a tool and a sample by using a bracket corresponding to the test direction;
simulation analysis, namely performing finite element simulation analysis on the dynamic characteristics of the tool and the tested sample assembly;
the test is carried out, the mode test and the frequency response function test are respectively carried out on the tested sample, the tool and the combination of the two, and the excitation point position, the excitation level, the control point position and the control mode are selected and adjusted according to the test result.
Further, according to the result of finite element simulation analysis, vibration tables with the same model and output or vibration tables with different models and different outputs are arranged at the positions of two different excitation points, and the vibration tables are controlled in a multi-point average or weighted square matrix mode corresponding to the positions of the control points.
The technical solution of the multiple synchronous vibration test systems has the outstanding substantive characteristics and remarkable progress: the synchronous vibration test system is formed by connecting a plurality of vibration tables with various thrust through layout, so that the more comprehensive vibration test requirement of a test piece with increased volume and weight can be met; and the device adopts tooling to reversely install and receive excitation, thereby saving and reducing weight gain brought by the supporting structure.
Drawings
FIG. 1 is a schematic perspective view of a plurality of synchronous vibration test apparatuses for Y-axis vibration test according to the present application.
Fig. 2 is a schematic diagram of a close-up structure of the tooling in the embodiment shown in fig. 1.
FIG. 3 is a schematic perspective view of a plurality of synchronous vibration test apparatuses for X-axis vibration test according to the present application.
Fig. 4 is a schematic perspective view of a plurality of synchronous vibration test apparatuses for a Z-axis vibration test according to the present application.
FIG. 5 is an X-axis frequency response diagram of the vibration test method of the present application at 300-1000 Hz.
FIG. 6 is a graph of Z-axis frequency response at 300-1000 Hz for the vibration test method of the present application.
Detailed Description
The following detailed description of the embodiments of the present application is provided with reference to the accompanying drawings, so that the technical scheme of the present application is easier to understand and grasp, and the protection scope of the present application is defined more clearly.
In view of the trend of large-volume and mass development of samples with vibration test requirements, the conventional equipment is more and more difficult to meet the requirements of related tests. The present inventors have innovatively proposed a plurality of synchronous vibration test devices and test methods thereof, which meet the requirements of vibration tests of products with various volumes and weights in various production fields, depending on the experience of long-term vibration table design.
First, from the device structure of the multiple synchronous vibration test systems, the outline structural features are as follows: the device comprises a simple foundation, a bracket, a tool and more than two vibrating tables, wherein the appearance and the specification of the tool are set to be matched with an open cuboid container in which samples are compatible, the tool is arranged on the simple foundation through the bracket to form a main body vacation shape, and the bracket is provided with more than two replacement groups with more than two heights and volumes corresponding to various test directions of the samples and can be detachably and interchangeably arranged between the simple foundation and the tool; the sample is fixed with the frock through the triangle-plate at length direction both ends, and each shaking table is fixed a position according to the required excitation direction location of sample test and is attached on simple and easy ground to link to each other, transmit the excitation with the frock through flexible pole.
In the above summary solutions, it should be specified in detail that the simple foundation is made of large steel plates, and the load deformation resistance of the simple foundation needs to be more than 50 tons; or a concrete terrace supported by steel bars. The shape and specification of the tool are customizable, and the tool is usually customized to meet the requirements of sample loading, sensor layout and the like due to the diversity of the shape structure and the volume of the samples. The following examples are each tailored to the relatively common elongated sample, and are therefore tentatively rectangular containers for ease of description of the referenceability of the multi-vibration table layout orientation. Because of the variety of vibration tests, the height of the actual attachment of the tool needs to be matched with the vibrating table, so that the bracket also has a plurality of replacement groups with different specifications so as to realize the flexible matching of the supporting height of the tool. In particular, the number of vibrating tables in the vibrating system generally requires two to four tables, or even more. So as to meet the increasing requirement of the output thrust of the sample; therefore, the sample body is equivalent to the increase of the points for vibration test, so that reliable and comprehensive product performance can be obtained through rich test control.
As a preferred embodiment of the present application for the Y-axis vibration test, as seen in the perspective schematic views shown in fig. 1 and 2, the Y-axis vibration test corresponds to the tool height direction. In the illustrated device structure, each vibrating table 41, 42 corresponding to two ends of the tool 3 in the length direction is mounted on the simple foundation 1 in a distributed manner, and the periphery of each vibrating table is provided with a fence frame 7 for fixing the vibrating table. The tooling 3 is lapped on the bracket through the air bag group 6 and is carried by the bracket 21 to be in a main body vacation shape. It can be seen that the oscillating table is conventionally attached vertically so that its moving coil a is vertically output (i.e., Y-axis direction), and the top of the support 21 is positioned higher than the oscillating table moving coil and the oscillating tables at the two ends are compatible with each other in a half-box structure. As can be seen in fig. 2, an auxiliary frame 211 of a limiting tool is further disposed on the top of the bracket 21, and the bracket 21 and the auxiliary frame 211 implement roller-type sliding fit through a toothed roller 212. Therefore, the tool can keep vertical jolt movement in the auxiliary frame, and the conditions that lateral jolts and the like affect test results are avoided.
In this embodiment, the moving coils of the two vibrating tables are connected with the frame at the end of the tooling 3 and the triangular plates 81a and 81b through the flexible rod 5, and output vibration excitation in the Y-axis direction at the current point position. Meanwhile, under the necessary implementation condition, a vibration table 43 for vibration compensation is also connected between the vibration tables arranged at the two ends of the tool, and a moving coil of the vibration table 43 is also connected with the bottom center of the tool 3 through a flexible rod 5 and outputs vibration excitation in the Y-axis direction at a connecting point. Therefore, the three excitation point positions can synchronously and controllably output thrust to the sample, and the three excitation point positions are controlled to participate in a modal test and a frequency response function test.
As a preferred embodiment of the present application for the X-axis vibration test, as seen in the schematic perspective view of fig. 3, the X-axis vibration test corresponds to the tool length direction. In the illustrated device structure, one end of the simple foundation 1 corresponding to the length direction of the tool 3 is connected with the vibrating table 4a, the other end of the simple foundation is connected with the two vibrating tables 4b side by side, and all the vibrating tables turn over 90 degrees towards the tool to be in a horizontal state, so that the moving coils are respectively in transverse output conforming to the X axial direction. Similarly, each vibrating table is provided with a fence frame 7 at the periphery, and the difference is that the vibration-resistant buffering direction for fixing the vibrating table is adjusted to be horizontal and transverse. The tool 3 does not need the air bag group to resist shaking and torsional vibration, is directly overlapped on the support 22, and realizes sleeve type sliding fit along the X-axis by the sleeve component 221. In this embodiment, the fixture 3 is adapted to the output central shaft of the moving coil of the vibrating table through the assembling height of the bracket 22, and the moving coil of each vibrating table is connected with the frame at the end of the fixture through the flexible rod 5, so as to output the excitation in the X axial direction at the current point position. The output thrust to the sample is synchronously controlled with three excitation point positions, wherein the output thrust direction of the vibrating table 4a and the output thrust direction of the vibrating table 4b are alternately and reciprocally reversed, and the output thrust of the vibrating table 4a is larger than the single output thrust of the vibrating table 4b but is close to the total output thrust of the groups of vibrating tables 4 b.
In addition to the illustrated embodiment, the number of the vibrating tables at the two ends of the tool in the X-axis vibration test can be the same, namely, one or two vibrating tables are respectively arranged at the two ends, and only the positions of the connecting frames of the flexible rods are required to be adjusted.
As a preferred embodiment of the present application for the Z-axis vibration test, as seen in the schematic perspective view shown in fig. 4, the Z-axis vibration test corresponds to the tool width direction. In the device structure of the figure, three vibrating tables 4 are attached to one side, corresponding to the width direction of the tool 3, of the simple foundation 1, all vibrating tables are turned 90 degrees towards the tool to be in a horizontal state, then the moving coils are respectively in transverse output conforming to the Z axial direction, and the fence frame 7 is arranged in the same way, so that redundant description is omitted. In this embodiment, the Z-axis vibration test is a single-side output, so the frame on the other side of the tool 3 needs to be supported by the air bag set 6. The reaction block 9 is attached to the simple foundation 1, and the airbag module 6 is abutted against the vertical surface of the reaction block. The tool 3 refers to an X-axis vibration test, enables the device to be highly matched with the output central shaft of the movable ring of the vibrating table through the support 23, and also enables sleeve-type sliding fit along the Z-axis through the sleeve component 231. The moving coil of each vibrating table 4 is connected with the lateral frame of the tool through a flexible rod 5, and the Z-axis excitation is output at the current point position of each moving coil. Although the three vibrating tables synchronously and controllably output thrust, the thrust direction and the frequency can be adjusted to be different, so that various modal tests and frequency response function test tests are met.
Of course, in addition to the illustrated embodiment, the reaction force blocks may be replaced with a suitable number of vibration tables, or vibration tables having one side positioned at the intermediate position may be removed, so that thrust forces are output to both sides in the tool width direction.
As further optimization, in order to reduce the overall weight of the tool, an aluminum plate and an aluminum profile are integrally welded, and the tool is hollowed and weight-reduced at a proper position.
Secondly, from the test method of the synchronous vibration test system, the outlined steps comprise:
1. preparing a test, namely positioning and attaching 2-4 vibrating tables on a simple foundation according to the excitation direction required by a sample test, and loading a tool and a sample by using a bracket corresponding to the test direction;
2. simulation analysis, namely performing finite element simulation analysis on the dynamic characteristics of the tool and the tested sample assembly;
3. the test is carried out, the mode test and the frequency response function test are respectively carried out on the tested sample, the tool and the combination of the two, and the excitation point position, the excitation magnitude, the control point position and the control mode are selected and adjusted according to the result obtained by the test. As shown in fig. 5 and 6, the frequency response diagrams of the synchronous vibration test devices in the application for X-axis and Z-axis of a certain sample under 300-1000 Hz are shown.
And setting vibration tables with the same model and different output or models and different output vibration tables at different excitation point positions according to the result of finite element simulation analysis, and controlling the vibration tables in a multi-point average or weighted rectangular matrix mode corresponding to the positions of the control points. Since the vibration test is quite mature in the current industry, the vibration test has a system from equipment to a method which is complete; based on the fact that the optional thrust range of the existing single vibrating table is 10 kN-500 kN, the specific details of the test development are mostly combined implementation of the existing test details, and the test process can be optimized in a targeted mode by combining with a controller manufacturer, so that detailed test process and detailed implementation thereof are omitted.
As can be seen from the detailed description of the embodiments of the multiple synchronous vibration test systems according to the present application, the present application has the outstanding substantial characteristics and significant improvements: the synchronous vibration test system is formed by connecting a plurality of vibration tables with various thrust through layout, so that the more comprehensive vibration test requirement of a test piece with increased volume and weight can be met; and the device adopts tooling to reversely install and receive excitation, thereby saving and reducing weight gain brought by the supporting structure.
In addition to the above embodiments, other embodiments of the present application are possible, and all technical solutions formed by equivalent substitution or equivalent transformation are within the scope of the present application as claimed.
Claims (10)
1. A plurality of synchronous vibration test devices, its characterized in that: the device comprises a simple foundation, a bracket, a tool and more than two vibrating tables, wherein the appearance and the specification of the tool are set to be matched with an open cuboid container in which samples are compatible, the tool is arranged on the simple foundation through the bracket to form a main body vacation shape, and the bracket is corresponding to the replacement groups with more than two heights and volumes in various test directions of the samples, and can be detachably and interchangeably arranged between the simple foundation and the tool; the sample is fixed with the frock through the triangle-plate at length direction both ends, and each shaking table is fixed a position and is attached on simple and easy ground according to the required excitation direction location of sample test to link to each other with the frock through flexible pole and transmit the excitation.
2. The multiple synchronous vibration testing apparatus according to claim 1, wherein: corresponding frock height Y axial sample vibration test, at least two shaking tables distribute and attach in frock length direction's both ends, the frock passes through the gasbag group overlap joint on the support and along Y axial roller type sliding fit, and the frock passes through the assembly height of support and is higher than the moving coil of shaking table, and the moving coil of every shaking table passes through flexible pole connection frock tip's frame and set square, is in the vibration excitation of current position output Y axial.
3. The multiple synchronous vibration testing apparatus according to claim 2, wherein: and a vibrating table for supplementing vibration is also arranged between the vibrating tables arranged at the two ends of the tool, and a moving coil of the vibrating table is connected with the center of the bottom of the tool through a flexible rod and outputs Y-axis excitation at a connecting point.
4. The multiple synchronous vibration testing apparatus according to claim 1, wherein: corresponding frock length X axial sample vibration test, at least two shaking tables distribute the dress and connect in frock length direction's both ends and respectively towards frock upset 90 degrees, frock overlap joint is on the support and along X axial telescopic slip, and the frock passes through the output center pin of the assembly height adaptation shaking table moving coil of support, and the moving coil of every shaking table passes through the frame of flexible pole connection frock tip, is in the vibration excitation of current position output X axial.
5. The multiple synchronous vibration testing apparatus according to claim 4, wherein: the number of the vibrating tables arranged at the two ends of the tool is identical or different.
6. The multiple synchronous vibration testing apparatus according to claim 1, wherein: the tool width Z axial sample vibration test comprises at least two vibrating tables which are connected to one side of the tool width direction in a distributed mode and are turned towards the tool by 90 degrees, the tool is lapped on a support and is slidably matched along the Z axial sleeve, a frame on the other side of the tool is abutted to a counterforce block vertical face connected to a simple foundation through an air bag group, the tool is matched with an output central shaft of a moving coil of the vibrating table through the assembling height of the support, and the moving coil of each vibrating table is connected with the frame on the side direction of the tool through a flexible rod and is used for outputting vibration excitation in the Z axial direction at the current point position.
7. The multiple synchronous vibration testing apparatus according to claim 1, wherein: the tool width Z axial sample vibration test comprises at least two vibrating tables which are connected to two sides of the tool width direction in a distributed mode and are turned towards the tool by 90 degrees respectively, the tool is lapped on a support and is in sleeve-type sliding fit along the Z axial direction, the tool is matched with an output central shaft of a moving coil of the vibrating table in a height fit mode through the assembly of the support, the moving coil of each vibrating table is connected with a lateral frame of the tool through a flexible rod, and the Z axial excitation is output at the current point position.
8. The multiple synchronous vibration testing apparatus according to claim 1, wherein: the tool is formed by integrally welding an aluminum plate and an aluminum profile, and is subjected to partial hollowing and weight reduction treatment.
9. A method for testing a plurality of synchronous vibrations, which is realized based on the apparatus according to any one of claims 1 to 8, and is characterized by comprising:
preparing a test, namely positioning and attaching 2-4 vibrating tables on a simple foundation according to the excitation direction required by a sample test, and loading a tool and a sample by using a bracket corresponding to the test direction;
simulation analysis, namely performing finite element simulation analysis on the dynamic characteristics of the combination of the tool and the tested sample;
the test is carried out, the mode test and the frequency response function test are respectively carried out on the tested sample, the tool and the combination of the two, and the excitation point position, the excitation level, the control point position and the control mode are selected and adjusted according to the test result.
10. The multiple synchronous vibration testing method according to claim 9, wherein: according to the result of finite element simulation analysis, vibration tables with the same model and output or vibration tables with different models and different outputs are arranged at the positions of two different excitation points, and the vibration tables are controlled by adopting a multipoint average or weighted rectangular matrix mode corresponding to the positions of the control points.
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| CN107941442A (en) * | 2017-11-30 | 2018-04-20 | 北京强度环境研究所 | Vibration testing device and the method that vibration test is carried out to product |
| CN109682559A (en) * | 2018-12-27 | 2019-04-26 | 天津航天瑞莱科技有限公司 | Double 35 tons of shake tables simultaneously swash test adjustment tooling |
| CN110057523A (en) * | 2019-05-27 | 2019-07-26 | 中国工程物理研究院总体工程研究所 | A kind of more of broadband simultaneously pushes away pilot system |
| CN112710449A (en) * | 2020-12-17 | 2021-04-27 | 北京苏试创博环境可靠性技术有限公司 | Horizontal excitation test device, combination thereof and installation method of horizontal excitation test device |
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