CN114593868B - Self-adaptive high-precision moment of inertia measuring device - Google Patents
Self-adaptive high-precision moment of inertia measuring device Download PDFInfo
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- CN114593868B CN114593868B CN202210126536.2A CN202210126536A CN114593868B CN 114593868 B CN114593868 B CN 114593868B CN 202210126536 A CN202210126536 A CN 202210126536A CN 114593868 B CN114593868 B CN 114593868B
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- 230000005540 biological transmission Effects 0.000 claims abstract description 33
- 230000001133 acceleration Effects 0.000 claims abstract description 17
- 238000005259 measurement Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 6
- 230000003044 adaptive effect Effects 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 15
- 238000009434 installation Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
Classifications
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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
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/10—Determining the moment of inertia
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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
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/02—Details of balancing machines or devices
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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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The application provides a self-adaptive high-precision moment of inertia measuring device which relates to the field of mechanical design and testing, and the self-adaptive high-precision moment of inertia measuring device comprises a mounting platform, a base, a small-range torsion spring mechanism, a medium-range torsion spring mechanism, a large-range torsion spring mechanism, a bearing, an angular acceleration sensor, a supporting spring and a rotating shaft, wherein the angular acceleration sensor is connected to the upper part of the mounting platform, the lower part of the mounting platform is connected to the base, the bearing is respectively arranged on the mounting platform and the base and is connected through the rotating shaft, the supporting spring is sleeved on the rotating shaft, the small-range torsion spring mechanism, the medium-range torsion spring mechanism and the large-range torsion spring mechanism are connected to the base, and the small-range torsion spring mechanism, the medium-range torsion spring mechanism and the large-range torsion spring mechanism are correspondingly connected with an outer convex transmission block on the mounting platform. According to the application, the mounting platform is stretched out and drawn back through the supporting spring, the convex transmission block is in matched contact with the torsion spring mechanism with the matched range, and the torsion springs with different ranges are selected in a self-adaptive manner, so that the high-precision moment of inertia is measured.
Description
Technical Field
The application relates to the field of mechanical design and test, in particular to a self-adaptive high-precision moment of inertia measuring device.
Background
The moment of inertia measurement has important application in scientific experiments, engineering technology, aerospace, mechanical industry and the like. As aircraft performance continues to increase, quality characterization techniques for aircraft are becoming increasingly important. For the high-speed moving aircraft, the moment of inertia is out of tolerance, more capability is required to control the flight direction and attitude, and the deviation of the aircraft from trajectory and the like are easily caused.
The existing measuring method comprises a compound pendulum method, a falling body method, a three-wire torsion method, a single-wire torsion method and a mass line method. The compound pendulum method is not suitable for large objects, the mass center of the objects needs to be accurately measured, the falling body method and the single-line torsion pendulum method are suitable for the construction of symmetrical distribution, and the three-line torsion method and the mass line method are complex in calculation.
According to the search of the prior art, the Chinese patent publication number is CN106338325A, and a method for measuring the mass and the rotational inertia of a small satellite in three directions is disclosed, but a test device and a scheme are complex. The Chinese patent publication No. CN102692264A discloses a method for measuring mass, mass center and rotational inertia, but the measuring method has larger error. CN206945219U discloses a moment of inertia meter, but it is difficult to meet the measurement of a high-precision wide moment of inertia range.
Based on the above requirements, it is currently needed to provide a high-precision moment of inertia test bench and a measurement method suitable for a wide moment of inertia range.
Disclosure of Invention
Aiming at the defects in the prior art, the application aims to provide a self-adaptive high-precision moment of inertia measuring device.
The application provides a self-adaptive high-precision moment of inertia measuring device, which comprises a mounting platform, a base, a small-range torsion spring mechanism, a medium-range torsion spring mechanism, a large-range torsion spring mechanism, a bearing, an angular acceleration sensor, a supporting spring and a rotating shaft, wherein the angular acceleration sensor is connected to the upper part of the mounting platform;
the supporting spring is pressed downwards through the weight of an object to be detected on the mounting platform, the outer protruding transmission block is driven to be in contact with the small-range torsion spring mechanism or the medium-range torsion spring mechanism or the large-range torsion spring mechanism, the angle of the mounting platform is adjusted, the angular acceleration of the mounting platform is calculated through the angular acceleration sensor, and the rotational inertia of the object to be detected is obtained.
In some embodiments, the small-range torsion spring mechanism, the medium-range torsion spring mechanism and the large-range torsion spring mechanism are consistent in structure and comprise a mounting shell, a torsion spring and a rotating shell, wherein the rotating shell is connected to the mounting shell to form a sealing cavity, the torsion spring is fixed in the sealing cavity, one end of the torsion spring is connected with the mounting shell, and the other end of the torsion spring is connected with the rotating shell.
In some embodiments, the rotary housing is provided with inner wall grooves disposed at 90 ° intervals.
In some embodiments, the male driving block is in corresponding contact with the inner wall groove.
In some embodiments, the base is provided with a fixing groove, and the small-range torsion spring mechanism, the medium-range torsion spring mechanism and the large-range torsion spring mechanism are respectively installed in the corresponding fixing grooves.
In some embodiments, the outer convex driving block comprises an upper outer convex driving block, a middle outer convex driving block and a lower outer convex driving block, and the upper outer convex driving block, the middle outer convex driving block and the lower outer convex driving block are arranged on the mounting platform at intervals of 90 degrees.
In some embodiments, the mounting platform comprises an upper mounting platform and a lower mounting platform, the bottom of the upper mounting platform is connected with the lower mounting platform, and the upper convex transmission block, the middle convex transmission block and the lower convex transmission block are arranged on the lower mounting platform at intervals of 90 degrees.
In some embodiments, the upper mounting platform is disc-shaped, the upper surface of the upper mounting platform is provided with a measuring and mounting threaded hole, and the lower surface of the upper mounting platform is connected with the angular acceleration sensor.
In some embodiments, the lower mounting platform is conical, and the bearing is mounted on an opening in the bottom of the lower mounting platform.
In some embodiments, the male driving block: fixing grooves: the number ratio of the inner wall grooves is 1:1:1.
compared with the prior art, the application has the following beneficial effects:
according to the application, the mounting platform is stretched out and drawn back through the supporting spring, the convex transmission block is in matched contact with the torsion spring mechanism with the matched range, and the torsion springs with different ranges are selected in a self-adaptive manner, so that the high-precision moment of inertia is measured.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is a schematic cross-sectional view of an adaptive high-precision moment of inertia measurement apparatus of the present application;
FIG. 2 is a schematic diagram of a self-adaptive high-precision moment of inertia measurement device according to the present application;
FIG. 3 is a schematic view of the structure of the mounting platform of the present application;
FIG. 4 is a schematic diagram of the torsion spring mechanism of the present application;
FIG. 5 is a cross-sectional view of the torsion spring mechanism of the present application;
FIG. 6 is a schematic view of a base of the present application;
FIG. 7 is a schematic cross-sectional view of a base of the present application.
Reference numerals in the drawings:
the device comprises a mounting platform 1, an upper mounting platform 11, a lower mounting platform 12, a convex transmission block 13, an upper convex transmission block 131, a middle convex transmission block 132, a lower convex transmission block 133, a base 2, a fixed groove 21, a small-range torsion spring mechanism 3, a mounting shell 31, a torsion spring 32, a rotating shell 33, an inner wall groove 34, a middle-range torsion spring mechanism 4, a large-range torsion spring mechanism 5, a bearing 6, an angular acceleration sensor 7, a supporting spring 8 and a rotating shaft 9.
Detailed Description
The present application will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present application, but are not intended to limit the application in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present application.
Examples
According to the self-adaptive high-precision moment of inertia measuring device provided by the application, as shown in figures 1-7, the self-adaptive high-precision moment of inertia measuring device comprises a mounting platform 1, a base 2, a small-range torsion spring mechanism 3, a medium-range torsion spring mechanism 4, a large-range torsion spring mechanism 5, a bearing 6, an angular acceleration sensor 7, a supporting spring 8 and a rotating shaft 9;
the mounting platform 1 comprises an upper mounting platform 11 and a lower mounting platform 12, the bottom of the upper mounting platform 11 is connected with the lower mounting platform 12, and the lower mounting platform 12 is connected to the base 2. The upper mounting platform 11 is discoid, and the upper surface of upper mounting platform 11 is equipped with the measurement installation screw hole, and angular acceleration sensor 7 is connected to the upper mounting platform 11 lower surface. The lower mounting platform 12 is conical, and a bearing 6 is arranged at an opening at the bottom of the lower mounting platform 12. Preferably, the bottom of the lower mounting platform 12 is circular. The upper convex transmission block 131, the middle convex transmission block 132 and the lower convex transmission block 133 are arranged on the lower mounting platform 12 at intervals of 90 degrees.
The bottom of the base 2 is provided with a circular groove for installing a bearing 6, and preferably, the bearing 6 is a high-precision low-friction commercial bearing. The two ends of the rotating shaft 9 are respectively connected with the bearing 6 on the lower mounting platform 12 and the bearing 6 on the base 2, and the supporting spring 8 is sleeved on the rotating shaft 9. Three fixing grooves 21 are formed in the base 2, and the small-range torsion spring mechanism 3, the medium-range torsion spring mechanism 4 and the large-range torsion spring mechanism 5 are fixedly mounted on the corresponding fixing grooves 21 through pins. The small-range torsion spring mechanism 3 is correspondingly connected with the upper outer convex transmission block 131, the middle-range torsion spring mechanism 4 is correspondingly connected with the middle outer convex transmission block 132, and the large-range torsion spring mechanism 5 is correspondingly connected with the lower outer convex transmission block 133.
The small-range torsion spring mechanism 3, the medium-range torsion spring mechanism 4 and the large-range torsion spring mechanism 5 are identical in structure and comprise a mounting shell 31, a torsion spring 32 and a rotating shell 33, wherein the rotating shell 33 is connected to the mounting shell 31 to form a sealing cavity, the torsion spring 32 is fixed in the sealing cavity, one end of the torsion spring 32 is connected with the mounting shell 31, and the other end of the torsion spring 32 is connected with the rotating shell 33. The rotary housing 33 is provided with inner wall grooves 34, preferably, the inner wall grooves 34 are disposed at intervals of 90 °. The outer convex transmission block 13 is correspondingly contacted with the inner wall groove 34.
Working principle:during operation, a measuring object is mounted on the upper surface of the upper mounting platform 11, the mounting platform 1 of the moment of inertia measuring platform descends to the corresponding position under the action of the supporting spring 8 according to the mass of the measuring object, and one of the upper convex transmission block 131, the middle convex transmission block 132 and the lower convex transmission block 131 on the lower mounting platform 12 is clamped into the small-range torsion spring mechanism 3 or the middle-range torsion spring mechanism 4 or the large-range torsion spring mechanism 5 with matched range. The installation platform 1 is stirred to a certain angle, the angular acceleration of the installation platform 1 is measured through the angular acceleration sensor 7, and the moment of inertia of the measured object can be obtained through calculation.
In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
The foregoing describes specific embodiments of the present application. It is to be understood that the application is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the application. The embodiments of the application and the features of the embodiments may be combined with each other arbitrarily without conflict.
Claims (10)
1. The self-adaptive high-precision moment of inertia measuring device is characterized by comprising a mounting platform (1), a base (2), a small-range torsion spring mechanism (3), a medium-range torsion spring mechanism (4), a large-range torsion spring mechanism (5), a bearing (6), an angular acceleration sensor (7), a supporting spring (8) and a rotating shaft (9), wherein the angular acceleration sensor (7) is connected to the upper part of the mounting platform (1), the lower part of the mounting platform (1) is connected to the base (2), the bearing (6) is respectively arranged on the mounting platform (1) and the base (2), the bearing (6) is connected through the rotating shaft (9), the supporting spring (8) is sleeved on the rotating shaft (9), the small-range torsion spring mechanism (3), the medium-range torsion spring mechanism (4) and the large-range torsion spring mechanism (5) are connected to the base (2), and the small-range torsion spring mechanism (4) and the large-range torsion spring mechanism (5) are correspondingly connected to a transmission block (13) on the mounting platform (1);
the supporting spring (8) is pressed downwards through the weight of an object to be detected on the mounting platform (1), the outer protruding transmission block (13) is driven to be in contact with the small-range torsion spring mechanism (3) or the medium-range torsion spring mechanism (4) or the large-range torsion spring mechanism (5), the angle of the mounting platform (1) is adjusted, the angular acceleration of the mounting platform (1) is calculated through the angular acceleration sensor (7), and the rotational inertia of the object to be detected is obtained.
2. The self-adaptive high-precision moment of inertia measuring device according to claim 1, wherein the small-range torsion spring mechanism (3), the medium-range torsion spring mechanism (4) and the large-range torsion spring mechanism (5) are identical in structure and comprise a mounting shell (31), a torsion spring (32) and a rotating shell (33), the rotating shell (33) is connected to the mounting shell (31) to form a sealing cavity, the torsion spring (32) is fixed in the sealing cavity, one end of the torsion spring (32) is connected with the mounting shell (31), and the other end of the torsion spring (32) is connected with the rotating shell (33).
3. The self-adaptive high-precision moment of inertia measuring device according to claim 2, wherein the rotating housing (33) is provided with inner wall grooves (34), and the inner wall grooves (34) are arranged at 90 ° intervals.
4. A self-adaptive high precision moment of inertia measuring device according to claim 3, characterized in that the male driving block (13) is in corresponding contact with the inner wall groove (34).
5. The self-adaptive high-precision moment of inertia measuring device according to claim 4, wherein a fixed groove (21) is formed on the base (2), and the small-range torsion spring mechanism (3), the medium-range torsion spring mechanism (4) and the large-range torsion spring mechanism (5) are respectively installed in the corresponding fixed groove (21).
6. The self-adaptive high-precision moment of inertia measurement device according to claim 1, wherein the outer convex transmission block (13) comprises an upper outer convex transmission block (131), a middle outer convex transmission block (132) and a lower outer convex transmission block (133), and the upper outer convex transmission block (131), the middle outer convex transmission block (132) and the lower outer convex transmission block (133) are arranged on the mounting platform (1) at intervals of 90 °.
7. The self-adaptive high-precision moment of inertia measurement device according to claim 6, wherein the mounting platform (1) comprises an upper mounting platform (11) and a lower mounting platform (12), the lower mounting platform (12) is connected to the bottom of the upper mounting platform (11), and the upper outer convex transmission block (131), the middle outer convex transmission block (132) and the lower outer convex transmission block (133) are arranged on the lower mounting platform (12) at intervals of 90 °.
8. The self-adaptive high-precision moment of inertia measuring device according to claim 7, wherein the upper mounting platform (11) is disc-shaped, a measuring mounting threaded hole is formed in the upper surface of the upper mounting platform (11), and the lower surface of the upper mounting platform (11) is connected with the angular acceleration sensor (7).
9. The self-adaptive high-precision moment of inertia measuring device according to claim 7, wherein the lower mounting platform (12) is conical, and the bearing (6) is mounted on a bottom opening of the lower mounting platform (12).
10. An adaptive high-precision moment of inertia measurement apparatus according to claim 5, wherein the male driving block (13): the fixing groove (21): the number ratio of the inner wall grooves (34) is 1:1:1.
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| CN202210126536.2A CN114593868B (en) | 2022-02-10 | 2022-02-10 | Self-adaptive high-precision moment of inertia measuring device |
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| CN202210126536.2A CN114593868B (en) | 2022-02-10 | 2022-02-10 | Self-adaptive high-precision moment of inertia measuring device |
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| CN114593868B true CN114593868B (en) | 2023-09-19 |
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