CN103308233A - Three-dimensional force measuring platform device - Google Patents
Three-dimensional force measuring platform device Download PDFInfo
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- CN103308233A CN103308233A CN2013102408311A CN201310240831A CN103308233A CN 103308233 A CN103308233 A CN 103308233A CN 2013102408311 A CN2013102408311 A CN 2013102408311A CN 201310240831 A CN201310240831 A CN 201310240831A CN 103308233 A CN103308233 A CN 103308233A
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Abstract
The invention belongs to the field of aeronautic dynamic tests, and relates to a three-dimensional force measuring platform device which mainly comprises a friction tabletop, a mounting tabletop, three-dimensional force sensors, sensor mounting flanges, a mounting bottom plate, connecting auxiliary parts and the like. The device is used on equipment for drop tests and shimmy tests for aircraft landing gears, drop tests for integral aircrafts and aircraft frame section landing impact tests, ground load testing requirements in the tests are met by the three-dimensional force measuring platform device, test errors are smaller than or equal to 0.5%F.S, cross interference errors are smaller than or equal to +/-3.0%, the degree of nonlinearity is smaller than or equal to 1.0%F.S, the repeatability is smaller than or equal to 1.0%F.S, the zero drift is smaller than or equal to +/-1.0%F.S, and lags F<x>, F<y> and F<z> are smaller than or equal to +/-1.0%F.S. The three-dimensional force measuring platform device has the advantages that the sizes of the tabletops, the measurement ranges of the sensors and the quantity of the sensors can be computed and determined according to dimensions of required test pieces and a load range during actual design, for example, four sensor structures can be utilized if the sizes of the tabletops and a load are small.
Description
Technical field
Patent of the present invention belongs to aeronautical dynamics test field, relates to a kind of three-dimensional platform device for force measurement, has that inertial load is little, self natural frequency is high, the advantages such as measuring accuracy is high, good reliability.
Background technology
This device is used for Aircraft Landing Gear Drop Test, shimmy test, ship-board aircraft complete machine drop-test and Airplane frame section pendant and hits test landing load testing apparatus.Because the testpieces size is large and three direction load when needing that testing experiment spare makes impact with the ground simultaneously, existing single force cell can't meet the demands and be domestic without corresponding ripe high precision three-dimensional device for measuring force in above-mentioned test.And, existing force plate/platform all relatively heavy, measuring error is large, do not possess three-dimensional simultaneously yet and survey loading capability.In certain model military aircraft gear test, 20 tonnes of three-dimensional force plate/platforms of once independent research of certain scientific research institution, group sensors (four sensors of vertical direction, two of side direction, two in course) more than it adopts respectively three direction shock loads of measuring table carry out data fitting again.Because it is split-type structural, assemblage gap more greatly between each parts, each installation of sensors position degree, the depth of parallelism, verticality all are difficult to ensure card in addition, the larger need of its measurement data curve burr carry out filtering by data acquisition equipment to be processed, the disadvantages affect test figure measuring accuracies such as simultaneously its three direction load error of crosstalking is larger, and the natural frequency of three-dimensional platform device for force measurement own is lower.
Summary of the invention
Goal of the invention: in order to solve landing load test problem in Aircraft Landing Gear Drop Test, the complete machine drop-test, improve measuring accuracy, the invention provides a kind of simple in structure, cheap, measuring accuracy is high, the three-dimensional platform device for force measurement of good reliability.
Technical scheme: a kind of three-dimensional platform device for force measurement, comprise table top 1, several three-dimensional force cells 2 and mounting base 3 are installed, described installation table top 1 is fixed on the three-dimensional force cell 2, and described installing floor board 3 is fixed in the below of three-dimensional force cell 2.
The quantity 2N of described three-dimensional force cell 2, equidistantly be installed in and install between table top 1 and the installing floor board 3, wherein, N 〉=2.
Described three-dimensional force cell 2 is fixed with table top 1 is installed by upper mounting flange 4 and erection bolt 5, and is fixing with installing floor board 3 by lower mounting flange 6 and erection bolt 5.
Described friction table top 7 and erection bolt 5 are fixing with installation table top 1.
Described installation table top 1 is hollow structure, is made by extra super duralumin alloy.
Be provided with locating device on described upper mounting flange 4 and the lower mounting flange 6.
Beneficial effect: three-dimensional platform device for force measurement of the present invention can satisfy Aircraft Landing Gear Drop Test, shimmy test, ship-board aircraft complete machine drop-test and Airplane frame section pendant hits landing load problem in the test, and that this device has advantages of is simple in structure, easy to use, reliability is higher, measuring accuracy is high, cost is lower, practical.According to capacity of equipment and the level of European and American developed countries, the three-dimensional force plate/platform testing apparatus of development China.Independent research of the present invention have 36 tons of international advanced vertical loading, level and load 18 tons, side direction and load 36 tonnes of impact platforms of 18 tons, the technical indicator of this platform has reached international most advanced level, and some index is a little more than the technical indicator of U.S. AMTI company.Equipment is crosstalked error apparently higher than U.S.'s product among comprehensive relatively the present invention, and it is for affecting experimental measurement precision key parameter; Secondly, it is larger than the table top quality is installed among the present invention that U.S.'s platform is installed table top, and its inertial load more also affects measuring accuracy; U.S.'s platform natural frequency is much larger than apparatus of the present invention, but the testpieces natural frequency generally all is lower than 60Hz in the test, just can meet the demands greater than 3 times of tested spare natural frequencys according to test request.
This device is fully used in certain emphasis model experimental test of country.This device extend to each machine the shake that falls, shimmy, Airplane frame section pendant hits, the correlation test checking application of impact and space flight and the product for civilian use.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is side view of the present invention;
Fig. 3 is partial sectional view of the present invention;
Fig. 4 is partial enlarged drawing of the present invention.
Wherein, 1-installs table top, 2-three-dimensional sensor, 3-mounting base, the upper mounting flange of 4-, mounting flange under the 5-, 6-erection bolt, the 7-table top that rubs.
Embodiment
Below in conjunction with accompanying drawing the present invention is done to describe in further detail, see also Fig. 1 to Fig. 4.
A kind of three-dimensional platform device for force measurement comprises table top 1, several three-dimensional force cells 2 and mounting base 3 is installed that described installation table top 1 is fixed on the three-dimensional force cell 2, and described installing floor board 3 is fixed in the below of three-dimensional force cell 2.
The quantity 2N of described three-dimensional force cell 2, equidistantly be installed in and install between table top 1 and the installing floor board 3, wherein, N 〉=2.
Described three-dimensional force cell 2 is fixed with table top 1 is installed by upper mounting flange 4 and erection bolt 5, and is fixing with installing floor board 3 by lower mounting flange 6 and erection bolt 5.
Described friction table top 7 and erection bolt 5 are fixing with installation table top 1.
Described installation table top 1 is hollow structure, is made by extra super duralumin alloy.
Be provided with locating device on described upper mounting flange 4 and the lower mounting flange 6.
Can be according to required test block size and load range during the design of this device, its mesa dimensions of calculative determination, transducer range and quantity.Adopt four sensor constructions such as mesa dimensions and load than I, namely remove middle two sensors of three-dimensional force plate/platform shown in Figure 1.More also can adopt eight sensor constructions such as mesa dimensions and load, eight sensors need be equally spaced and table top are installed and mounting base is connected.
During the real work of this device (detailed operation process) with this device be installed on test specimen direction of motion under, this device mounting base is connected fastening with the level ground, sensor connects with data acquisition unit by data line, (simulation test specimen colliding surface operating mode) can draw vertical direction and the horizontal direction load that bump produces by sensor output signal when test specimen impinges upon three-dimensional platform device for force measurement upper surface.
The main body of three-dimensional force plate/platform cuts into hollow structure by the Imported Aluminium alloy monolithic, before the processing starting material are carried out x-ray inspection, require general processing around the platform, finishing is carried out on its upper and lower surface, guarantees the upper and lower surperficial depth of parallelism ≯ 0.1mm, rough surface ≯ 3.2 μ m.This design has significantly reduced the platform quality, improved platform and supported rigidity, Effective Raise the natural frequency of platform itself, got rid of the coupled interference of natural frequency to test signal, be a kind of advanced person's method for designing.In the three-dimensional force plate/platform development by to the analysis discussion of foreign data and sum up existing design and use experience, Effective Raise the natural frequency of platform itself.
It is inserted physical construction that the present invention adopts sensor and terminal pad, the three-dimensional force cell is connected with upper and lower table top by card extender, the Design Orientation boss cooperates with positioning round orifice on the upper and lower table top on the exchanging structure, to guarantee sensor with respect to the accuracy of force plate/platform position, make Platform Machinery connected mode optimization.This advanced person's design effectively reduces platform self three-dimensional intersection mushing error.
Platform base of the present invention is that the modifier treatment of 45# steel board processes, finishing has been adopted in processing, guarantee the upper and lower surperficial depth of parallelism ≯ 0.1mm, rough surface ≯ 3.2 μ m, blackout or zinc-plated processing are adopted in the surface, this method for designing has been dwindled the gap between the mechanical connection, effectively reduces the additional interference error of platform inertial load.
In order to guarantee the wearing quality of top layer table top, adopt duralumin, hard alumin ium alloy plate (material: 2A12) processing, table top process the upper and lower surperficial depth of parallelism all≤0.1mm, processing step hole on the table top, be spirally connected by interior six square bolts and main body table top, the roughness of surface working adopts rhombic-shaped grid decorative pattern pattern, can satisfy the required roughness of various friction factor by the degree of depth and the width that changes the grid decorative pattern, and this roughness design processing can be satisfied the demand of all drop-tests.
Independent research of the present invention have 36 tons of international advanced vertical loading, level and load 18 tons, side direction and load 36 tonnes of impact platforms of 18 tons, the technical indicator of this platform has reached international most advanced level, some index is a little more than the technical indicator of U.S. AMTI company, shown in table 1 and table 2.Equipment is crosstalked error apparently higher than U.S.'s product among comprehensive relatively the present invention, and it is for affecting experimental measurement precision key parameter; Secondly, it is larger than the table top quality is installed among the present invention that U.S.'s platform is installed table top, and its inertial load more also affects measuring accuracy; U.S.'s platform natural frequency is much larger than apparatus of the present invention, but the testpieces natural frequency generally all is lower than 60Hz in the test, just can meet the demands greater than 3 times of tested spare natural frequencys according to test request.
This device is fully used in certain emphasis model experimental test of country.This device extend to each machine the shake that falls, shimmy, Airplane frame section pendant hits, the correlation test checking application of impact and space flight and the product for civilian use.
Table 1
U.S. AMTI company 35 tons of three-dimensional platform device for force measurements the key technical indexes
Table 2
36 tons of three-dimensional force plate/platforms of the present invention the key technical indexes
| Specification | ? |
| Full weight range | ? |
| Vertical load | 360kN |
| Course load | 180kN |
| Side load | 180kN |
| Overload is held | 150%of?F.S. |
| Output sensitivity | 2.0mV/V?F.S. |
| Driving voltage | 5V--10V |
| Bridge is pressed cloudy anti- | 350?0hms |
| Nonlinearity | ≤1%F.S. |
| Hysteresis error | ≤1%F.S |
| Temperature range | -20℃～60℃ |
| The error of crosstalking | ≤3%F.S |
| Natural frequency | ＞200H z |
Claims (7)
1. three-dimensional platform device for force measurement, it is characterized in that, comprise table top [1], several three-dimensional force cells [2] and mounting base [3] are installed, described installation table top [1] is fixed on the three-dimensional force cell [2], and described installing floor board [3] is fixed in the below of three-dimensional force cell [2].
2. a kind of three-dimensional platform device for force measurement according to claim 1 is characterized in that, the quantity 2N of described three-dimensional force cell [2], and equidistantly be installed in and install between table top [1] and the installing floor board [3], wherein, N 〉=2.
3. a kind of three-dimensional platform device for force measurement according to claim 2, it is characterized in that, described three-dimensional force cell [2] is fixed with table top [1] is installed by upper mounting flange [4] and erection bolt [5], and is fixing with installing floor board [3] by lower mounting flange [6] and erection bolt [5].
4. a kind of three-dimensional platform device for force measurement according to claim 3 is characterized in that, described friction table top [7] is fixing by erection bolt [5] and installation table top [1].
5. a kind of three-dimensional platform device for force measurement according to claim 4 is characterized in that, described installation table top [1] is hollow structure, is made by extra super duralumin alloy.
6. a kind of three-dimensional platform device for force measurement according to claim 5 is characterized in that, described friction table top [5] is special grid pattern structure, is made by extra super duralumin alloy.
7. a kind of three-dimensional platform device for force measurement according to claim 6 is characterized in that, is provided with locating device on described upper mounting flange [4] and the lower mounting flange [6].
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| CN2013102408311A CN103308233A (en) | 2013-06-17 | 2013-06-17 | Three-dimensional force measuring platform device |
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| CN2013102408311A CN103308233A (en) | 2013-06-17 | 2013-06-17 | Three-dimensional force measuring platform device |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103604543A (en) * | 2013-11-21 | 2014-02-26 | 北京卫星环境工程研究所 | Three-dimensional general force measuring platform for satellite force limit vibration test |
| CN103645027A (en) * | 2013-11-28 | 2014-03-19 | 江西洪都航空工业集团有限责任公司 | General-purpose plane vertical crash test device and test method |
| CN103759872A (en) * | 2014-01-02 | 2014-04-30 | 上海交通大学 | Multi-freedom-degree force measuring device for vibration test of ocean platform model |
| CN103822769A (en) * | 2014-02-28 | 2014-05-28 | 北京卫星环境工程研究所 | Three-direction force-measuring loop |
| CN104614108A (en) * | 2015-01-12 | 2015-05-13 | 清华大学 | Device and method for measuring ground hauling load of aircraft |
| CN106441774A (en) * | 2016-10-28 | 2017-02-22 | 武汉理工大学 | Shipboard aircraft undercarriage test device and test method |
| CN107884108A (en) * | 2017-11-30 | 2018-04-06 | 江西洪都航空工业集团有限责任公司 | A kind of triaxial residual stresses based on uniaxially pull pressure sensor |
| CN109100107A (en) * | 2018-08-17 | 2018-12-28 | 中航飞机起落架有限责任公司 | A kind of lateral slip three-dimensional force plate/platform |
| CN111516899A (en) * | 2020-04-30 | 2020-08-11 | 中国飞机强度研究所 | Large-size high-range reinforced concrete table force measuring device, system and method |
| CN115034049A (en) * | 2022-05-26 | 2022-09-09 | 中国航空工业集团公司沈阳飞机设计研究所 | Method for determining overall load state and evaluating structural strength of aircraft landing state |
| CN117007267A (en) * | 2023-10-07 | 2023-11-07 | 中国飞机强度研究所 | Three-way ground load measuring device and measuring method for ship-borne aircraft drop test |
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| CN101122611A (en) * | 2006-08-09 | 2008-02-13 | 日立金属株式会社 | Multi-range three-axis acceleration sensor device |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103604543A (en) * | 2013-11-21 | 2014-02-26 | 北京卫星环境工程研究所 | Three-dimensional general force measuring platform for satellite force limit vibration test |
| CN103645027A (en) * | 2013-11-28 | 2014-03-19 | 江西洪都航空工业集团有限责任公司 | General-purpose plane vertical crash test device and test method |
| CN103759872A (en) * | 2014-01-02 | 2014-04-30 | 上海交通大学 | Multi-freedom-degree force measuring device for vibration test of ocean platform model |
| CN103759872B (en) * | 2014-01-02 | 2015-10-14 | 上海交通大学 | For the multiple degrees of freedom device for measuring force of offshore platform model shaking test |
| CN103822769A (en) * | 2014-02-28 | 2014-05-28 | 北京卫星环境工程研究所 | Three-direction force-measuring loop |
| CN104614108A (en) * | 2015-01-12 | 2015-05-13 | 清华大学 | Device and method for measuring ground hauling load of aircraft |
| CN106441774A (en) * | 2016-10-28 | 2017-02-22 | 武汉理工大学 | Shipboard aircraft undercarriage test device and test method |
| CN107884108A (en) * | 2017-11-30 | 2018-04-06 | 江西洪都航空工业集团有限责任公司 | A kind of triaxial residual stresses based on uniaxially pull pressure sensor |
| CN107884108B (en) * | 2017-11-30 | 2020-01-31 | 江西洪都航空工业集团有限责任公司 | three-dimensional force measuring platform based on single axial tension pressure sensor |
| CN109100107A (en) * | 2018-08-17 | 2018-12-28 | 中航飞机起落架有限责任公司 | A kind of lateral slip three-dimensional force plate/platform |
| CN109100107B (en) * | 2018-08-17 | 2020-06-30 | 中航飞机起落架有限责任公司 | Lateral slidable three-dimensional force measuring platform |
| CN111516899A (en) * | 2020-04-30 | 2020-08-11 | 中国飞机强度研究所 | Large-size high-range reinforced concrete table force measuring device, system and method |
| CN115034049A (en) * | 2022-05-26 | 2022-09-09 | 中国航空工业集团公司沈阳飞机设计研究所 | Method for determining overall load state and evaluating structural strength of aircraft landing state |
| CN117007267A (en) * | 2023-10-07 | 2023-11-07 | 中国飞机强度研究所 | Three-way ground load measuring device and measuring method for ship-borne aircraft drop test |
| CN117007267B (en) * | 2023-10-07 | 2024-01-09 | 中国飞机强度研究所 | Three-way ground load measuring device and measuring method for ship-borne aircraft drop test |
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Application publication date: 20130918 |