CN111912592A - Staring camera micro-vibration test equipment and method - Google Patents
Staring camera micro-vibration test equipment and method Download PDFInfo
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- CN111912592A CN111912592A CN202010761331.2A CN202010761331A CN111912592A CN 111912592 A CN111912592 A CN 111912592A CN 202010761331 A CN202010761331 A CN 202010761331A CN 111912592 A CN111912592 A CN 111912592A
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
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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
- G01M7/022—Vibration control arrangements, e.g. for generating random vibrations
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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
- G01M7/027—Specimen mounting arrangements, e.g. table head adapters
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Abstract
The invention provides staring camera micro-vibration test equipment and a staring camera micro-vibration test method, wherein the staring camera micro-vibration test equipment comprises a camera support component 1, vibration excitation equipment 2, an air spring 3 and a two-dimensional turntable base 5, wherein the camera support component 1 is connected with the two-dimensional turntable base 5 through the air spring 3, the vibration excitation equipment 2 is respectively connected with the two-dimensional turntable base 5 and the camera support component 1, and a staring camera 4 to be tested is arranged on the camera support component 1; the invention has simple structure and convenient operation, obtains the micro-vibration index of the staring camera to be tested through the test, assists the iterative design and installation of staring camera products, and improves the pointing precision and the imaging performance of the staring camera in an orbit micro-vibration environment; the invention can effectively weaken the influence of external interference vibration source; the invention can enable the staring camera to be tested to generate vibration excitation with 6 degrees of freedom, and simulate the micro-vibration condition in multiple directions under the rail environment.
Description
Technical Field
The invention relates to the field of vibration tests, in particular to staring camera micro-vibration test equipment and a staring camera micro-vibration test method, and especially relates to staring camera micro-vibration test complete equipment and a staring camera micro-vibration test method.
Background
At present, the imaging and pointing positioning performance requirements of a staring camera in the satellite operation process are higher and higher, and for the staring camera, the influence of the micro-vibration response of a satellite platform at a load installation position on the camera state is very obvious. Therefore, in order to improve pointing accuracy and imaging performance of the staring camera in an on-orbit micro-vibration environment, the influence of a satellite micro-vibration environment on the staring camera state is tested, and a micro-vibration index is obtained, which is very important. The testing methods in the multi-channel integrated testing system (patent number: CN201710399049.2) of the geostationary orbit area array staring camera are mostly tests for isolating and reducing micro-vibration, and the performance testing work of the staring camera under the multi-degree-of-freedom simulation micro-vibration environment cannot be completed. Therefore, on the basis of the two-dimensional turntable, the micro-vibration test is applied to high-precision imaging and pointing of images, the whole staring camera micro-vibration test equipment is utilized, multi-freedom-degree direction excitation is realized, and indexes of the staring camera under the micro-vibration environment are obtained, so that iterative design and installation of staring camera products are assisted, product accuracy is guaranteed, and meanwhile work efficiency is improved.
Patent document No. CN209927397U discloses a vibration test bed, which comprises a bedplate and a clamp mounted on the bedplate through a telescopic adjusting mechanism, wherein a clamping space is arranged between the bedplate and the clamp, and an anti-skid supporting cushion block is padded in the clamping space; the clearance between anchor clamps and the platen is adjusted through flexible adjustment mechanism to through anti-skidding lip block and flexible adjustment mechanism's cooperation with the examination of awaiting measuring spare compress tightly as on the platen, make the centre gripping of treating the examination spare not receive the restriction of holding head specification, one the utility model discloses well vibration test platform can be used to the examination of awaiting measuring spare of the multiple different specifications of centre gripping, has effectively solved and has prepared multiple anchor clamps, has caused the improvement of anchor clamps development expense, and has prepared multiple specification anchor clamps wasting of resources, will frequently change the anchor clamps of different specifications when also having solved the examination spare of multiple dimensions simultaneously, chooses anchor clamps waste time, also influences efficiency of software testing's problem. However, this test stand is not suitable for performing a vibration test on a gaze camera because it cannot simulate the in-orbit satellite vibration environment of the gaze camera.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide staring camera micro-vibration test equipment and a staring camera micro-vibration test method.
According to one aspect of the invention, the staring camera micro-vibration test equipment comprises a camera support assembly, vibration excitation equipment, an air spring and a two-dimensional turntable base, wherein the camera support assembly is connected with the two-dimensional turntable base through the air spring, the vibration excitation equipment is respectively connected with the two-dimensional turntable base and the camera support assembly, and a staring camera to be tested is installed on the camera support assembly.
Preferably, the camera support assembly comprises an L-shaped connecting plate, side plates and horizontal ear plates, the longitudinal part of the L-shaped connecting plate is a back plate, the transverse part of the L-shaped connecting plate is a bottom plate, the bottom of the bottom plate is connected with an air spring, the two sides of the bottom plate are connected with the horizontal ear plates, the side plates are arranged on the two sides of the L-shaped connecting plate and connected with the back plate and the bottom plate, and the back plate, the side plates and the horizontal ear plates are all connected with vibration excitation equipment;
the camera body of the staring camera to be tested is arranged on the L-shaped connecting plate, and the horn-shaped collecting opening of the staring camera to be tested faces the back side of the backboard.
Preferably, the excitation devices on the back plate, the side plates and the horizontal ear plates are symmetrically distributed around the center of mass of the staring camera to be tested.
Preferably, the number of the horizontal ear plates is multiple, and the number of the side plates is multiple.
Preferably, the excitation equipment includes vibration exciter and the fixed frock of vibration exciter, be provided with one or more vibration exciter on the fixed frock of vibration exciter, the fixed frock of vibration exciter sets up on two-dimentional revolving stage base, backplate, curb plate or horizontal otic placode are connected to the vibration exciter, the excitation equipment on the backplate, the excitation equipment on the curb plate and the excitation equipment on the horizontal otic placode act on the direction mutually perpendicular, can make waiting to test gazing camera realize the translation and the pivoting of three orthogonal direction.
Preferably, the vibration exciters are mounted on the vibration exciter fixing tool in pairs, and the vibration exciters are connected to the back plate, the side plate or the horizontal ear plate in pairs.
Preferably, the number of the air springs is one or more, each air spring comprises a telescopic sealed container and a fixing plate, the telescopic sealed container is arranged between the two fixing plates, one fixing plate is connected with the bottom plate, and the other fixing plate is connected with the two-dimensional turntable base.
Preferably, the two-dimensional turntable base comprises a cylindrical base and a foundation, the cylindrical base is arranged on the foundation and can rotate relative to the foundation, the camera support assembly is arranged on the cylindrical base through an air spring, and the excitation equipment is arranged on the cylindrical base and/or the foundation.
Preferably, the fixation camera further comprises a controller, wherein the controller is in signal connection with the excitation equipment, the controller can control vibration of the excitation equipment, and the fixation camera can translate and rotate around the shaft by controlling synchronous and asynchronous vibration of the paired vibration exciters.
According to another aspect of the present invention, there is provided a staring camera micro-vibration testing method using the staring camera micro-vibration testing apparatus, comprising the steps of:
step 1: and (3) establishing a test state: the camera support assembly is connected with the two-dimensional turntable base through an air spring, a staring camera to be tested is installed, the cylindrical base is fixed, and vibration excitation equipment is installed and adjusted;
step 2: background noise and imaging test: acquiring vibration data at a measuring point of the staring camera to be tested, testing background noise of a test environment, and then testing the imaging function of the staring camera to be tested;
and step 3: the sweep frequency and fixed frequency excitation micro-vibration test comprises the following steps:
step 3.1: applying signals to paired vibration exciters arranged in three orthogonal directions through a controller to control vibration of the vibration exciters, and generating linear reciprocating translation when applying same-frequency and same-phase signals to the paired vibration exciters in the same direction; when signals with same frequency phase difference pi/2 are applied to paired vibration exciters in the same direction, reciprocating rotation is generated around a shaft;
step 3.2: the method comprises the steps of carrying out frequency sweep analysis on a sensitive frequency band of a staring camera to be tested, carrying out fixed-frequency translation or rotation excitation on a vibration exciter under a corresponding frequency signal, and collecting and storing data;
step 3.3: repeating the step 3.1-3.2 to complete data measurement of a plurality of working conditions;
and 4, step 4: shutting down and disassembling the equipment: and after the test is finished, cutting off the power supply to finish the disassembly of the vibration excitation equipment and the camera support assembly.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention has simple structure and convenient operation, and can obtain the micro-vibration index of the staring camera to be tested through the test, thereby assisting the iterative design and installation of staring camera products and improving the pointing precision and the imaging performance of the staring camera in an orbit micro-vibration environment.
2. The invention adopts the technical means that the camera support assembly is connected with the two-dimensional turntable base through the air spring, so that the camera support assembly can isolate most external vibration under the action of the air spring, and the influence of an external interference vibration source is effectively weakened.
3. The invention adopts the technical means that a plurality of vibration excitation devices are symmetrically distributed around the mass center of the staring camera to be tested, and the action directions of the vibration excitation devices on the back plate, the vibration excitation devices on the side plates and the vibration excitation devices on the horizontal ear plates are mutually vertical, so that the staring camera to be tested can realize translation and axial rotation in three orthogonal directions, namely, vibration excitation of 6 degrees of freedom of the staring camera to be tested is realized, and the micro-vibration condition of the staring camera to be tested in multiple directions under the in-orbit environment is simulated.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic diagram of the right view structure of the present invention;
FIG. 3 is a schematic front view of the present invention;
FIG. 4 is a schematic top view of the present invention;
fig. 5 is a rear view structural diagram of the present invention.
The figures show that:
1- -Camera support Assembly 302- -mounting plate
101-L-shaped connecting plate 4-staring camera to be tested
102- -side plate 401- -trumpet-shaped collecting port
103-horizontal ear plate 402-camera body
2-excitation equipment 5-two-dimensional turntable base
201-vibration exciter 501-cylindrical base
202-vibration exciter fixing tool 502-foundation
3- -air spring 7- -deflection angle
301-telescopic closed container
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
The invention discloses staring camera micro-vibration test equipment and a staring camera micro-vibration test method, wherein the staring camera micro-vibration test equipment comprises a camera support assembly 1, vibration excitation equipment 2, an air spring 3 and a two-dimensional turntable base 5. On the basis of fixing a two-dimensional turntable base 5, a camera support assembly 1 is supported through an air spring 3, and then a staring camera 4 to be tested, which is arranged on the camera support assembly 1, is excited by 3 groups of excitation equipment 2, so that micro-vibration with 6 degrees of freedom can be generated, and the micro-vibration conditions in multiple directions under the rail environment can be simulated. The invention can obtain the micro-vibration index of the staring camera through tests, thereby assisting the iterative design and installation of staring camera products and improving the pointing accuracy and the imaging performance of the staring camera products in an on-orbit micro-vibration environment. The invention aims to provide staring camera micro-vibration test equipment and a staring camera micro-vibration test method, which are used for acquiring a micro-vibration index of a staring camera to assist product iteration and design so as to enhance the accuracy of imaging and pointing.
The staring camera micro-vibration test equipment provided by the invention comprises a camera support assembly 1, vibration excitation equipment 2, an air spring 3 and a two-dimensional turntable base 5, as shown in figures 1-5, wherein the camera support assembly 1 is connected with the two-dimensional turntable base 5 through the air spring 3, the vibration excitation equipment 2 is respectively connected with the two-dimensional turntable base 5 and the camera support assembly 1, and a staring camera 4 to be tested is arranged on the camera support assembly 1. The staring camera 4 to be tested is a piece to be tested for performance verification test; the camera support assembly 1 is connected with the two-dimensional turntable base 5 through the air spring 3, so that most of external vibration can be isolated by the camera support assembly 1 under the action of the air spring 3, and the influence of an external interference vibration source is effectively weakened.
The camera support assembly 1 comprises an L-shaped connecting plate 101, a side plate 102 and a horizontal ear plate 103, wherein the longitudinal part of the L-shaped connecting plate 101 is a back plate, the transverse part of the L-shaped connecting plate 101 is a bottom plate, the bottom of the bottom plate is connected with an air spring 3, the two sides of the bottom plate are connected with the horizontal ear plate 103, the side plate 102 is arranged on the two sides of the L-shaped connecting plate 101 and connected with the back plate and the bottom plate, and the back plate, the side plate 102 and the horizontal ear plate 103 are all connected with excitation equipment; the camera body 402 of the gaze camera 4 to be tested is mounted on the L-shaped link plate 101, and the trumpet-shaped capturing opening 401 of the gaze camera 4 to be tested faces the back side of the backboard. The excitation devices 2 on the back plate, the excitation devices 2 on the side plates and the excitation devices 2 on the horizontal ear plates 103 are symmetrically distributed around the center of mass of the staring camera 4 to be tested. The number of the horizontal ear plates 103 is multiple, and the number of the side plates 102 is multiple. Preferably, the side plate 102 is an inclined side plate.
The number of the air springs 3 is one or more, the air springs 3 comprise a telescopic closed container 301 and fixing plates 302, the telescopic closed container 301 is arranged between the two fixing plates 302, one fixing plate 302 is connected with a bottom plate, and the other fixing plate 302 is connected with the two-dimensional turntable base 5. The inside of the collapsible airtight container 301 is filled with compressed air,
the two-dimensional turntable base 5 comprises a cylindrical base 501 and a foundation 502, the cylindrical base 501 is arranged on the foundation 502, the cylindrical base 501 can rotate relative to the foundation 502, the camera support assembly 1 is arranged on the cylindrical base 501 through an air spring 3, and the excitation equipment 2 is arranged on the cylindrical base 501 and/or the foundation 502. The two-dimensional turntable base 5 is the foundation of the test platform.
The invention also comprises a controller which is connected with the excitation equipment 2 by signals, the controller can control the vibration of the excitation equipment 2, and the translation and the axial rotation of the staring camera 4 are realized by controlling the synchronous and asynchronous vibration of the paired vibration exciters 201.
According to the staring camera micro-vibration test method provided by the invention, the staring camera micro-vibration test equipment is adopted, and the staring camera micro-vibration test method comprises the following steps:
step 1: and (3) establishing a test state: the camera support assembly 1 is connected with the two-dimensional turntable base 5 through the air spring 3, and can play a role in weakening the influence of an external interference vibration source; mounting a staring camera 4 to be tested, fixing the cylindrical base 501, and mounting and adjusting the vibration excitation equipment 2; preferably, the excitation device 2 is installed around the center of mass of the cylindrical base 501 provided with the staring camera 4 to be tested, and in addition, whether data acquisition can be smoothly carried out needs to be checked, and impurities are removed to ensure field test conditions;
step 2: background noise and imaging test: acquiring vibration data at a measuring point of the staring camera 4 to be tested, testing background noise of a test environment, and then testing the imaging function of the staring camera 4 to be tested; so as to ensure the smooth proceeding of the subsequent test;
and step 3: the sweep frequency and fixed frequency excitation micro-vibration test comprises the following steps:
step 3.1: applying signals to the paired vibration exciters 201 arranged in three orthogonal directions through a controller to control the vibration exciters 201 to vibrate, and generating linear reciprocating translation when applying same-frequency and same-phase signals to the paired vibration exciters 201 in the same direction; when signals with same frequency phase difference pi/2 are applied to the paired vibration exciters 201 in the same direction, reciprocating rotation around an axis is generated;
step 3.2: the frequency sweep analysis is carried out on the sensitive frequency band of the staring camera 4 to be tested, the vibration exciter 201 carries out fixed-frequency translation or rotation vibration excitation under the corresponding frequency signal, and data are collected and stored;
step 3.3: repeating the step 3.1-3.2 to complete data measurement of a plurality of working conditions;
and 4, step 4: shutting down and disassembling the equipment: after the test is finished, cutting off the power supply to finish the disassembly of the excitation equipment 2 and the camera support assembly 1; and properly positioned and then cleaned on site.
Example (b):
a staring camera micro-vibration test complete equipment is mainly implemented by a staring camera, a camera support assembly 1 is isolated from most vibration through an air spring 3, and an excitation device 2 is mainly connected with the camera support assembly 1 and installed on an exciter fixing tool 202 and used for generating vibration excitation, as shown in figure 1.
As shown in fig. 2, the vibration exciters 201 in the excitation apparatus 2 are mounted on the vibration exciter fixing tool 202, are uniformly distributed on two sides of the mass axis, and are used for applying integral translation and deflection vibration around the axis of the mass center, and when the vibration exciters 201 on the two side plates 102 are synchronously excited to generate vibration in the X direction, they are asynchronously excited to generate reciprocating deflection vibration around the Z axis.
As shown in fig. 3, when the exciters 201 on the two back plates are excited synchronously to generate vibration in the Y direction, they are excited asynchronously to generate reciprocating deflection vibration around the X axis.
As shown in fig. 4, when the exciters 201 on the two horizontal ear plates 103 are excited synchronously to generate vibration in the Z direction, they are excited asynchronously to generate reciprocating deflection vibration around the Y axis.
As shown in fig. 5, the axial deflection vibration of the gazing camera 4 to be tested, for example, in the X-axis direction, is a reciprocating deflection angle 7 which is a slight angle α generated by the attached camera mount assembly 1 within the elastic deformation allowable range of the air spring 3.
According to the invention, on the basis of the two-dimensional turntable base 5, a micro-vibration test is applied to high-precision imaging and pointing of images, and the whole set of staring camera micro-vibration test equipment is utilized to realize multi-degree-of-freedom direction vibration excitation and obtain indexes of the staring camera under a micro-vibration environment, so that iterative design and installation of staring camera products are assisted, product accuracy is ensured, and meanwhile, working efficiency is improved.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. The staring camera micro-vibration test equipment is characterized by comprising a camera support assembly (1), excitation equipment (2), an air spring (3) and a two-dimensional turntable base (5), wherein the camera support assembly (1) is connected with the two-dimensional turntable base (5) through the air spring (3), the excitation equipment (2) is respectively connected with the two-dimensional turntable base (5) and the camera support assembly (1), and a staring camera (4) to be tested is installed on the camera support assembly (1).
2. The staring camera microvibration test device according to claim 1, characterized in that the camera mount assembly (1) comprises an L-shaped connecting plate (101), a side plate (102) and a horizontal ear plate (103), wherein the longitudinal part of the L-shaped connecting plate (101) is a back plate, the transverse part of the L-shaped connecting plate (101) is a bottom plate, the bottom of the bottom plate is connected with an air spring (3), the two sides of the bottom plate are connected with the horizontal ear plate (103), the side plate (102) is arranged at the two sides of the L-shaped connecting plate (101) and is connected with the back plate and the bottom plate, and the back plate, the side plate (102) and the horizontal ear plate (103) are all connected with an excitation;
the camera body (402) of the staring camera (4) to be tested is installed on the L-shaped connecting plate (101), and the horn-shaped collecting opening (401) of the staring camera (4) to be tested faces the back side of the backboard.
3. A gaze camera micro-vibration testing device according to claim 2, characterized in that the excitation devices (2) on the back plate, the excitation devices (2) on the side plates and the excitation devices (2) on the horizontal ear plates (103) are symmetrically distributed around the centroid of the gaze camera (4) to be tested.
4. A gaze camera microvibration test apparatus according to claim 1, characterized in that the number of the horizontal ear plates (103) is plural and the number of the side plates (102) is plural.
5. The staring camera micro-vibration test equipment as claimed in claim 1, wherein the vibration exciter (2) comprises a vibration exciter (201) and a vibration exciter fixing tool (202), one or more vibration exciters (201) are arranged on the vibration exciter fixing tool (202), the vibration exciter fixing tool (202) is arranged on the two-dimensional turntable base (5), the vibration exciter (201) is connected with the back plate, the side plate (102) or the horizontal ear plate (103), and the vibration exciter (2) on the back plate, the vibration exciter (2) on the side plate and the vibration exciter (2) on the horizontal ear plate (103) are perpendicular to each other in action directions, so that the staring camera (4) to be tested can realize translation and rotation around the shaft in three orthogonal directions.
6. The staring camera microvibration test equipment according to claim 5, characterized in that the vibration exciters (201) are mounted in pairs on an exciter fixing fixture (202), and the vibration exciters (201) are connected in pairs on a back plate, a side plate (102) or a horizontal ear plate (103).
7. The staring camera microvibration test apparatus according to claim 1, characterized in that the number of the air springs (3) is one or more, the air springs (3) comprise a retractable airtight container (301) and a fixed plate (302), the retractable airtight container (301) is arranged between two fixed plates (302), one of the fixed plates (302) is connected with the base plate, and the other fixed plate (302) is connected with the two-dimensional turntable base (5).
8. A gaze camera microvibration test device according to claim 1, characterized in that the two-dimensional turntable base (5) comprises a cylindrical base (501) and a foundation (502), the cylindrical base (501) being arranged on the foundation (502), the cylindrical base (501) being rotatable with respect to the foundation (502), the camera mount assembly (1) being arranged on the cylindrical base (501) by means of an air spring (3), the excitation device (2) being arranged on the cylindrical base (501) and/or the foundation (502).
9. The gaze camera microvibration test device according to claim 6, characterized by further comprising a controller in signal connection with the excitation device (2), the controller being capable of controlling the vibrations of the excitation device (2), the translational and axial rotations of the gaze camera (4) being achieved by controlling the synchronous and asynchronous vibrations of the pairs of exciters (201).
10. A staring camera microvibration test method, characterized in that the staring camera microvibration test apparatus of any one of claims 1 to 6 is used, comprising the steps of:
step 1: and (3) establishing a test state: the camera support assembly (1) is connected with the two-dimensional turntable base (5) through an air spring (3), a staring camera (4) to be tested is installed, the cylindrical base (501) is fixed, and the vibration excitation equipment (2) is installed and adjusted;
step 2: background noise and imaging test: acquiring vibration data at a measuring point of the staring camera (4) to be tested, testing background noise of a test environment, and then testing the imaging function of the staring camera (4) to be tested;
and step 3: the sweep frequency and fixed frequency excitation micro-vibration test comprises the following steps:
step 3.1: applying signals to the paired vibration exciters (201) arranged in three orthogonal directions through a controller to control the vibration exciters (201) to vibrate, and generating linear reciprocating translation when applying same-frequency and same-phase signals to the paired vibration exciters (201) in the same direction; when signals with same frequency phase difference pi/2 are applied to paired vibration exciters (201) in the same direction, reciprocating rotation around an axis is generated;
step 3.2: the sensitive frequency band of the staring camera (4) to be tested is analyzed by frequency sweep, a vibration exciter (201) performs fixed-frequency translation or rotation vibration excitation under a corresponding frequency signal, and data are collected and stored;
step 3.3: repeating the step 3.1-3.2 to complete data measurement of a plurality of working conditions;
and 4, step 4: shutting down and disassembling the equipment: and after the test is finished, cutting off the power supply to finish the disassembly of the excitation equipment (2) and the camera support assembly (1).
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| CN113237622A (en) * | 2021-05-13 | 2021-08-10 | 西安科技大学 | Vibration testing system for onboard camera of heading machine |
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Application publication date: 20201110 |