CN110793793B - Ground unfolding test system of large-scale load platform - Google Patents
Ground unfolding test system of large-scale load platform Download PDFInfo
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- CN110793793B CN110793793B CN201910919607.2A CN201910919607A CN110793793B CN 110793793 B CN110793793 B CN 110793793B CN 201910919607 A CN201910919607 A CN 201910919607A CN 110793793 B CN110793793 B CN 110793793B
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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
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/007—Subject matter not provided for in other groups of this subclass by applying a load, e.g. for resistance or wear testing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G99/00—Subject matter not provided for in 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
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
Abstract
The invention discloses a ground expansion test system of a large-scale load platform, which comprises: the device comprises an installation platform, a gravity balance device, a large-scale load platform, a connection unlocking device, a rotating speed measuring system and a timing system; the large-scale load platform is a test object and has the functions of unfolding and locking; the large-scale load platform is connected with the gravity balance device, and the gravity balance device realizes the gravity balance of the large-scale load platform in the whole unfolding process; the connecting and unlocking device is arranged on the large-scale load platform, the large-scale load platform is fixed on the surface of the mounting platform before the connecting and unlocking device is tested, and the connecting and unlocking device is used for removing the connection between the large-scale load platform and the mounting platform during the test; when the large-scale load platform is unfolded and locked around the rotating shaft of the large-scale load platform, the rotating speed measuring system measures the unfolding speed, and the timing system measures the time required by the whole unfolding process. The method solves the problem that the ground verification of the expansion performance of the tonnage large-scale load platform is difficult, and has high efficiency.
Description
Technical Field
The invention belongs to the field of aerospace, and particularly relates to a ground expansion test system of a large-scale load platform.
Background
When the aircraft runs on the orbit or works on other stars, the gravity environment of the aircraft is greatly different from the surface of the earth. If the centrifugal force borne by the earth orbit satellite almost offsets the earth gravity, the spacecraft is in a microgravity state, and the gravity acceleration magnitude is generally 10-3～10-4g; although the space mechanism finally works in the microgravity gravity field, the space mechanism is manufactured and tested on the earthThe gravity is carried out in a gravity environment, the gravity has great influence on the characteristics of a space mechanism, effective measures are necessary to eliminate the influence of additional load caused by the weight of a load on the mechanism, and the gravity balance is one of effective methods.
At present, there are many gravity balancing methods, mainly including a falling method, a parabolic flight method, a buoyancy method, an air cushion method and a hanging method. According to the test characteristics of aerospace products, the method mainly applied is a buoyancy method, an air floatation method and a suspension method. By combining the characteristic of the expansion of the load platform, the buoyancy method is difficult to control, and the unstable factors are more; the air floatation method is mainly used for one-dimensional unfolding, and most satellite solar cell wing unfolding tests adopt the method, but the air floatation method needs an air floatation platform, has higher cost and cannot adapt to high-temperature and low-temperature working conditions; the suspension system can adapt to translation, rotation and even three-dimensional compound motion, but no suspension test system which can adapt to rotary expansion of a tonnage large-scale load platform is found at present, and similar domestic data are not collected.
Disclosure of Invention
The technical problem solved by the invention is as follows: the ground expansion test system for the large-scale load platform has the advantages that the requirement on the driving torque of a product is low, the weight and gravity center deviation of a load to be expanded have good adaptability, multiple times of expansion verification can be quickly carried out, the ground expansion test system can be applied to normal temperature and high and low temperature environments, the problem that the expansion performance of a tonnage large-scale load platform is difficult to verify on the ground is solved, and the ground expansion test system for the large-scale load platform has high efficiency.
The purpose of the invention is realized by the following technical scheme: a ground deployment test system for large load platforms, comprising: the device comprises an installation platform, a gravity balance device, a large-scale load platform, a connection unlocking device, a rotating speed measuring system and a timing system; the large-scale load platform is a test object and has the functions of unfolding and locking; the large-scale load platform is connected with the gravity balance device, and the gravity balance device realizes the gravity balance of the large-scale load platform in the whole unfolding process; the connecting and unlocking device is arranged on the large-scale load platform, the large-scale load platform is fixed on the surface of the mounting platform before the connecting and unlocking device is tested, and the connecting and unlocking device is used for removing the connection between the large-scale load platform and the mounting platform during the test; when the large-scale load platform is unfolded and locked around the rotating shaft of the large-scale load platform, the rotating speed measuring system measures the unfolding speed, and the timing system measures the time required by the whole unfolding process.
In the ground expansion test system of the large-scale load platform, the mounting platform is made of a frame made of steel materials and a covering.
In the ground unfolding test system of the large-scale load platform, the gravity balance device comprises a swing rod, a lifting rope, a first counter weight, a rotating unit, a base and a second counter weight; the swing rod is connected with the base through the rotating unit; one end of the swing rod is provided with a first balance weight, and the other end of the swing rod is connected with one end of the lifting rope; the other end of the lifting rope is provided with a second balance weight; the rotating unit is arranged in the middle of the swing rod and can be used for carrying out position adjustment in the horizontal direction on the base.
In the ground unfolding test system for the large-scale load platform, the outer surface of the rotating unit is coated with lubricating grease.
In the ground expansion test system of the large-scale load platform, the lubricating grease is EF lubricating grease.
In the ground unfolding test system of the large-scale load platform, the large-scale load platform comprises a load platform, a driving assembly, a lock seat and a lock hook; wherein the load platform is connected with the gravity balancing device; one end of the driving assembly is connected with the mounting platform, and the other end of the driving assembly is connected with the load platform to provide driving force; the lock seat is arranged on the mounting platform, the lock hook is arranged on the load platform, and the lock seat and the lock hook are matched to complete a locking function.
In the ground unfolding test system for the large-scale load platform, the connecting and unlocking device is used for connecting the mounting platform and the large-scale load platform.
In the ground unfolding test system of the large-scale load platform, the rotating speed measuring system comprises a laser tracker and a target; before the test, the target is fixed on the large-scale load platform, and the target and the laser tracker perform light path calibration; during the test, the light path of the target and the laser tracker continuously exists along with the rotation of the large-scale load platform.
In the ground unfolding test system of the large-scale load platform, the connecting and unlocking device is an electromagnet device, wherein the electromagnet device comprises an electromagnet, an adjustable adapter plate and an adhesive; the electromagnet is fixed on the mounting platform through the adhesive, the adjustable adapter plate is fixed on the large-scale load platform through the adhesive, and the adjustable adapter plate can be attached to the electromagnet through adjustment.
In the ground unfolding test system of the large-scale load platform, the connecting and unlocking device is an initiating device, wherein the initiating device comprises initiating explosive devices, a loading device, a collecting device and a fastening piece; the collecting device is fixed on the mounting platform through a fastener, the loading device is fixed on the large-scale load platform through a fastener, the initiating explosive device is installed in the collecting device, and the large-scale load platform is connected with the mounting platform through connection with the loading device.
Compared with the prior art, the invention has the following beneficial effects:
the method has low requirement on the driving torque of the product, has good adaptability to the weight and gravity center deviation of the load to be unfolded, can quickly carry out multiple unfolding verification, can be applied to normal temperature and high and low temperature environments, solves the problem of difficult ground verification of the unfolding performance of a ton-level large-scale load platform, and has high efficiency.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic structural diagram of a ground deployment test system for a large load platform according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a gravity balance device according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a large load platform according to an embodiment of the present invention;
FIG. 4 is a schematic view of an electromagnet apparatus according to an embodiment of the present invention;
fig. 5 is a schematic view of an initiating device according to an embodiment of the invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Fig. 1 is a schematic structural diagram of a ground deployment test system of a large-scale loading platform according to an embodiment of the present invention. As shown in fig. 1, the ground deployment test system of the large loading platform is characterized by comprising: the device comprises an installation platform 1, a gravity balance device 2, a large-scale load platform 3, a connecting and unlocking device 4, a rotating speed measuring system 5 and a timing system 6; wherein the content of the first and second substances,
the large-scale load platform 3 is a test object and has the functions of unfolding and locking; the large-scale load platform 3 is connected with the gravity balance device 2, and the gravity balance device 2 realizes the gravity balance of the large-scale load platform 3 in the whole unfolding process; the connecting and unlocking device 4 is arranged on the large-scale load platform 3, the large-scale load platform 3 is fixed on the surface of the mounting platform 1 before the connecting and unlocking device 4 is tested, and the connecting and unlocking device 4 is used for removing the connection between the large-scale load platform 3 and the mounting platform 1 during the test; during the process of unfolding and locking the large-scale load platform 3 around the rotating shaft thereof, the rotating speed measuring system 5 measures the unfolding speed, and the timing system 6 measures the time required by the whole unfolding process.
The installation platform provides a large-scale load platform and an installation interface for connecting the unlocking device, the interface can be designed according to actual conditions, the installation platform has good bearing capacity and strong rigidity, formal cabin body products can be used, and simulated cabin body tools can also be used. Specifically, the mounting platform 1 is made of a frame made of a steel material and a skin using a simulated cabin fixture. Referring to fig. 3, the large load platform 3 is composed of a load platform 301, a driving assembly 302, a lock base 303 and a lock hook 304, the connection unlocking device 4 uses an electromagnet scheme, and the suction force reaches 80N; the rotating speed measuring system 5 consists of a laser tracker and a target and can realize speed measurement within the range of 0-160 degrees; the timing system 6 adopts an artificial stopwatch timing mode and adopts multi-person timing to average.
As shown in fig. 2, the gravity balance device 2 includes a swing lever 201, a lifting rope 202, a first weight 203, a rotating unit 204, a base 205, and a second weight 206; wherein the content of the first and second substances,
the swing link 201 is connected with the base 205 through the rotating unit 204; one end of the swing rod 201 is provided with a first counterweight 203, and the other end of the swing rod 201 is connected with one end of the lifting rope 202; the other end of the lifting rope 202 is provided with a second counterweight 206; the rotating unit 204 is disposed in the middle of the swing link 201, and can perform horizontal direction position adjustment on the base 205.
The lifting rope is connected with the platform assembly in a four-point lifting mode, and can adapt to the change of the gravity center of the load assembly in a four-point enclosed area; the balance lifting point of the large-scale load platform can be led out to a proper position outside the cabin wall by arranging the second balance weight, so that the lifting space of the lifting rope is ensured; all the balance weights can be adjusted according to actual conditions, so that the adaptability of the gravity balance device to the weight of the load to be unfolded is enhanced; the rotating unit is a rotating shaft of the gravity balancing device, can adapt to normal temperature and high and low temperature environments by coating low-temperature lubricating grease, and ensures that the rotating shaft of the gravity balancing device and a rotating shaft of a product have good coaxiality through proper adjustment measures. Specifically, the lifting rope 202 is lifted by four points, the counterweight 203 is determined according to the weight of the large-scale load platform 3, and finally, a proper lifting point can be set to ensure the gravity balance of the large-scale load platform 3; the rotary unit 204 is arranged in the middle of the swing rod 201 and can be horizontally adjusted on the base 205, 601EF lubricating grease is coated on the rotary unit 204 to adapt to a low-temperature working condition, and the self resistance moment is only 3.5 N.m when the weight of a load to be expanded reaches 1 t; the base 205 provides a stable platform for the gravity balance device 2 and can adjust the levelness of the mounting surface of the rotating unit 204. Furthermore, the 601EF lubricating grease is adopted as the lubricating grease, so that the lubricating grease can better adapt to normal temperature and high and low temperature environments.
As shown in fig. 3, the large load platform 3 is composed of a load platform 301, a driving assembly 302, a lock base 303 and a lock hook 304; wherein the content of the first and second substances,
the load platform 301 is connected with the gravity balance device 2; one end of the driving assembly 302 is connected with the mounting platform 1, and the other end of the driving assembly 302 is connected with the load platform 301 to provide driving force; the lock base 303 is mounted on the mounting platform 1, and the lock hook 304 is mounted on the load platform 301, and the two cooperate to complete a locking function.
The connecting and unlocking device 4 is used for connecting the mounting platform 1 and the large-scale load platform 3, and the adopted scheme comprises an electromagnet device and an initiating explosive device.
As shown in fig. 4, the connection unlocking device is an electromagnet scheme, and includes an electromagnet 41, an adjustable adapter plate 42, and an adhesive 43; the electromagnet 41 is fixed on the mounting platform 1 through an adhesive 43, the adjustable adapter plate 42 is fixed on the large-scale load platform 3 through the adhesive 43, and the adjustable adapter plate 42 can be well attached to the electromagnet 41 through adjustment. Before the test, the electromagnet 41 is powered off, so that the large-scale load platform 3 is kept in a closed state; during the test, the electromagnet 41 is electrified without attraction force, the connection between the large-scale load platform 3 and the mounting platform 1 is released, and the large-scale load platform rotates and unfolds under the action of driving force.
As shown in fig. 5, the connection unlocking device is an initiating explosive device, and comprises an initiating explosive device 410, a loading device 420, a collecting device 430 and a fastener 440; the collecting device 430 is fixed on the mounting platform 1 through a fastener 440, the loading device 420 is fixed on the large-scale load platform 3 through a fastener 440, the initiating explosive device 410 is installed in the collecting device 430, and the large-scale load platform 3 is connected with the mounting platform 1 through connection with the loading device 420. Before the test, the initiating explosive device 410 is not electrified, and the large-scale load platform 3 keeps a closed state; during the test, the initiating explosive device 410 is electrified and detonated, the connection between the large-scale load platform 3 and the mounting platform 1 is released, and the large-scale load platform rotates and expands under the action of driving force.
As shown in fig. 1, the rotational speed measuring system 5 includes a laser tracker 51 and a target 52; before the test, the target 52 is fixed on the large-scale loading platform 3, and the target 52 and the laser tracker 51 perform light path calibration; during the test, as the large loading platform 3 rotates, the optical path between the target 52 and the laser tracker 51 continuously exists.
Fixing the target at a proper position on a large-scale load platform before testing, placing a laser tracker at a proper position, and completing light path calibration of the target and the laser tracker; in the test process, the target is dynamically adjusted in a manual or intelligent control mode along with the rotation of the large-scale load platform, so that the target and the light path of the laser tracker continuously exist.
The timing system starts timing at the initial moment of the large-scale load platform unfolding and stops timing after locking. According to different precision requirements, the method can be realized by adopting manual stopwatch timing or automatic timing.
The test procedure was as follows: firstly, temporarily connecting a large-scale load platform 3 with an installation platform 1 through a fastener, then roughly adjusting a counterweight 203 of a gravity balance device 2 according to the weight of the large-scale load platform 3, connecting the gravity balance device 2 with the large-scale load platform 3, and then finely adjusting the counterweight 203 of the gravity balance device 2 to realize accurate gravity balance of the large-scale load platform 3; the connection unlocking device 4 is in a state of power failure and suction, and then the temporary connection is released; after the test starting instruction is issued, the connecting unlocking device 4 is powered on and has no suction force, the large-scale load platform 3 rotates and unfolds, and finally the lock hook 303 and the lock seat 304 are locked. The speed of deployment is measured by the tachometer system 5 and the time required for the entire deployment is measured by the timing system 6.
The test system of the embodiment has small resistance moment, and can still have certain capacity to complete the unfolding test under the working conditions that the weight of a large-scale load platform reaches the ton level and the unfolding driving moment is small. The specific structural form of the test system can be designed according to specific requirements, fields and other conditions, and the test system is convenient to assemble and disassemble; the system adopts a lubricating measure for resisting high and low temperatures in each rotating link, and can meet the requirements of high and low temperature development.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Claims (2)
1. A ground expansion test system of a large-scale load platform is characterized by comprising: the device comprises an installation platform (1), a gravity balance device (2), a large-scale load platform (3), a connecting and unlocking device (4), a rotating speed measuring system (5) and a timing system (6); wherein the content of the first and second substances,
the large-scale load platform (3) is a test object and has the functions of unfolding and locking;
the large-scale load platform (3) is connected with the gravity balance device (2), and the gravity balance device (2) realizes the gravity balance of the large-scale load platform (3) in the whole unfolding process;
the connecting and unlocking device (4) is arranged on the large-scale load platform (3), the large-scale load platform (3) is fixed on the surface of the mounting platform (1) before the connecting and unlocking device (4) is tested, and the connecting and unlocking device (4) is used for removing the connection between the large-scale load platform (3) and the mounting platform (1) during the test;
when the large-scale load platform (3) is unfolded around the rotating shaft and locked, the rotating speed measuring system (5) measures the unfolding speed, and the timing system (6) measures the time required by the whole unfolding process;
the mounting platform (1) is made of a frame made of steel materials and a skin;
the gravity balance device (2) comprises a swing rod (201), a lifting rope (202), a first counterweight (203), a rotating unit (204), a base (205) and a second counterweight (206); wherein the content of the first and second substances,
the swing rod (201) is connected with the base (205) through the rotating unit (204);
one end of the swing rod (201) is provided with a first counterweight (203), and the other end of the swing rod (201) is connected with one end of the lifting rope (202);
the other end of the lifting rope (202) is provided with a second counterweight (206);
the rotating unit (204) is arranged in the middle of the swing rod (201) and can be horizontally adjusted on the base (205);
the outer surface of the rotating unit (204) is coated with grease; the lubricating grease adopts 601EF lubricating grease;
the large-scale load platform (3) comprises a load platform (301), a driving assembly (302), a lock seat (303) and a lock hook (304); wherein the content of the first and second substances,
the load platform (301) is connected with the gravity balancing device (2);
one end of the driving assembly (302) is connected with the mounting platform (1), and the other end of the driving assembly (302) is connected with the load platform (301) to provide driving force; the lock base (303) is arranged on the mounting platform (1), the lock hook (304) is arranged on the load platform (301), and the lock base and the lock hook are matched to complete a locking function;
the rotational speed measuring system (5) comprises a laser tracker (51) and a target (52); before the test, the target (52) is fixed on the large-scale load platform (3), and the target (52) and the laser tracker (51) perform light path calibration; during the test, the light path of the target (52) and the laser tracker (51) continuously exists along with the rotation of the large-scale load platform (3);
the connection unlocking device is an electromagnet device, wherein the electromagnet device comprises an electromagnet (41), an adjustable adapter plate (42) and an adhesive (43); the electromagnet (41) is fixed on the installation platform (1) through the adhesive (43), the adjustable adapter plate (42) is fixed on the large-scale load platform (3) through the adhesive (43), and the adjustable adapter plate (42) can be attached to the electromagnet (41) through adjustment;
the connection unlocking device is an initiating explosive device, wherein the initiating explosive device comprises an initiating explosive device (410), a loading device (420), a collecting device (430) and a fastening piece (440); the collecting device (430) is fixed on the mounting platform (1) through a fastener (440), the loading device (420) is fixed on the large-scale load platform (3) through the fastener (440), the initiating explosive device (410) is mounted in the collecting device (430), and the large-scale load platform (3) is connected with the mounting platform (1) through connection with the loading device (420);
fixing the target at a proper position on a large-scale load platform before testing, placing a laser tracker at a proper position, and completing light path calibration of the target and the laser tracker; in the test process, the target is dynamically adjusted in a manual or intelligent control mode along with the rotation of the large-scale load platform, so that the light paths of the target and the laser tracker continuously exist;
the timing system starts timing at the initial moment of the expansion of the large-scale load platform and stops timing after locking; according to different precision requirements, the method can be realized by adopting manual stopwatch timing or automatic timing;
the test procedure was as follows: firstly, temporarily connecting a large-scale load platform (3) with an installation platform (1) through a fastener, then roughly adjusting a counterweight (203) of a gravity balancing device (2) according to the weight of the large-scale load platform (3), connecting the gravity balancing device (2) with the large-scale load platform (3), and finely adjusting the counterweight (203) of the gravity balancing device (2) to realize accurate gravity balance of the large-scale load platform (3); the connection unlocking device (4) is in a state of power failure and suction, and then the temporary connection is released; after a test starting instruction is issued, the connecting unlocking device (4) is electrified without suction force, the large-scale load platform (3) is rotated and unfolded, and finally the lock hook (304) and the lock seat (303) are locked; the rotating speed measuring system (5) measures the unfolding speed, and the timing system (6) measures the time required by the whole unfolding process.
2. The ground deployment test system for large load platforms of claim 1, wherein: the connecting and unlocking device (4) is used for connecting the mounting platform (1) and the large-scale load platform (3).
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| CN106812400B (en) * | 2017-03-13 | 2018-09-04 | 江苏美龙航空部件有限公司 | A kind of aircraft door lifting device |
| CN107246862B (en) * | 2017-05-19 | 2020-01-07 | 上海宇航系统工程研究所 | Gravity balance method for ground test of heavy satellite-borne deployable antenna |
| CN108001713B (en) * | 2017-11-20 | 2020-07-14 | 上海卫星装备研究所 | On-orbit separation ground test device and detection method for double-star combined spacecraft |
| CN108871065B (en) * | 2018-04-27 | 2023-08-22 | 中国科学院沈阳自动化研究所 | Space effective load compressing and releasing device suitable for lunar surface environment |
| CN109050981A (en) * | 2018-08-31 | 2018-12-21 | 上海宇航系统工程研究所 | It is a kind of have can open up and the Flight Vehicle Structure of fixed platform |
| CN109649697B (en) * | 2019-01-14 | 2020-10-09 | 上海卫星工程研究所 | Satellite cabin connection method under over-constrained condition |
| CN110027732B (en) * | 2019-03-29 | 2020-11-20 | 北京卫星制造厂有限公司 | Gravity unloading device in assembling and debugging process of light parts of spacecraft |
| CN110146274B (en) * | 2019-06-13 | 2021-08-17 | 上海航天设备制造总厂有限公司 | Cabin door mechanism unfolding test device and implementation method thereof |
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