CN103353374B - 3 take advantage of 3 formula, 3 dynamometry barycenter platform systems - Google Patents
3 take advantage of 3 formula, 3 dynamometry barycenter platform systems Download PDFInfo
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- CN103353374B CN103353374B CN201310289028.7A CN201310289028A CN103353374B CN 103353374 B CN103353374 B CN 103353374B CN 201310289028 A CN201310289028 A CN 201310289028A CN 103353374 B CN103353374 B CN 103353374B
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Abstract
The invention discloses and a kind ofly adopt 3 of the manufacture of multi sensor combination technology to take advantage of 3 formula, 3 dynamometry barycenter platform systems.By integral for three little standard range sensors organic assembling, form the non-standard range sensors assembly that precision is higher, then be assembled into wide range barycenter platform by three non-standard range sensors assemblys.The present invention had both prevented the sensor nonlinear stressed mistake caused when adopting multi-point sampler, can not produce larger range redundancy and precision reduction again because of selection standard sensors of large measurement range.
Description
Technical field
The invention belongs to spacecraft technical field of measurement and test, specifically, relate to a kind of system measured for Large Spacecraft quality center of mass.
Background technology
Mass property parameter is object a series of mechanics parameters relevant with quality.Mass property comprise quality, centroid position, relative to the moment of inertia of given coordinate system and the product of inertia, be the basic inherent characteristic parameter describing product mechanical characteristic.In the development of spacecraft, need to determine these parameters by test, and according to designing requirement, necessary adjustment is carried out to these parameters.
3 domestic at present force-measuring type barycenter testing apparatus ranges are lower, can not meet Large Spacecraft quality center of mass test assignment (as weight 17000kg, weighing precision 1kg, torgue measurement precision 1kgm).In order to expand the testing range of barycenter platform, if the sensor of selection standard wide range (range 10000kg, precision 0.03%) then can produce larger range redundancy (range is 3*10000=30000kg), and measuring accuracy lower (weighing precision 7.4kg, torgue measurement precision 4.2kgm).If select multiple spot (being greater than 3 points) to survey centroid method, the factors such as inconsistent or the distortion of barycenter platform table top can be out of shape due to sensor, cause the non-linear force of sensor, produce larger error even mistake.Therefore, it is possible to realize wide range, the testing apparatus of high precision centroid measurement become domestic barycenter power of test improve bottleneck.
Summary of the invention
In order to meet wide range, high-precision barycenter testing requirement, the present inventor improves existing 3 dynamometry modes dexterously, by arranging three satellite force-detecting positions circumferentially replaces this force-detecting position together in its vicinity for the center of circle with former force-detecting position, thus complete the present invention.
Of the present invention 3 take advantage of 3 formula, 3 dynamometry barycenter platform systems, comprise the upper table surface for carrying test specimen weight, three sensor combinations bodies, supplemental support and the following table for fixation of sensor assembly and supplemental support, three sensor combinations bodies and supplemental support are arranged between upper table surface and following table, supplemental support prevents to impact and transverse force when being used for the upper table surface of test specimen and/or the upper barycenter platform of frock lifting, upper platform structure is steel combined with aluminum table top, steel table top provides the connecting interface of carrying test specimen and its upper surface, it is lower is aluminium table top, by carrying test specimen weight accurate transfer on three sensor combinations bodies of the same circumferentially distribution in 120o angle, wherein, each sensor combinations body is by main supporting component, upper junction plate, three small-range standard transducers and supporting component thereof and lower connecting plate composition, main supporting component comprises the lifting regulating mechanism being screwed onto upper table surface lower surface and regulating upper table surface to move up and down, the supporting seat of steel ball and support steel ball, steel ball contacts with lifting regulating mechanism lower surface ball-and-socket, the supporting seat that upper surface is forced through of barycenter platform upper table surface is delivered on upper junction plate, power suffered by it, as the load parts of small-range standard transducer, on average decomposes on it by upper junction plate, three small-range standard transducers carry upper junction plate by supporting component, and circumferentially distribute in 120o angle same with supporting component, lower connecting plate is connected on barycenter platform following table, for the installation of small-range standard transducer, adjustment and fixing.
Wherein, small-range standard transducer is the standard transducer of range 2200kg, precision 0.01%.
Wherein, upper lower connecting plate is the set square of same shape, and three small-range standard transducers are L-shaped, and the long limit of L shape is parallel respectively with three limits of set square.
Wherein, the quantity of supplemental support is also three, is arranged on equally samely circumferentially to support upper table surface.
Wherein, three small-range standard transducers of each sensor combinations body are connected to accordingly on corresponding measuring instrument and carry out quality center of mass position calculation.
The invention has the advantages that, the sensor combinations body structure that the small-range standard transducer arranged by three concentrics is formed, expand the measurement range (range 19800kg) of barycenter platform, ensure that higher precision (Mass accuracy 1kg, torque accuracy 1kgm), meet Large Spacecraft quality center of mass and measure needs.
Accompanying drawing explanation
Fig. 1 is of the present invention 3 schematic diagram taking advantage of 3 formula, 3 dynamometry barycenter platform systems;
Wherein, 1 is upper table surface; 2 is following table; 3 is sensor combinations body; 4 is supplemental support.
Fig. 2 is of the present invention 3 structural representations taking advantage of sensor combinations body in 3 formula, 3 dynamometry barycenter platform systems;
Wherein, 21 is main supporting component; 22 is upper junction plate; 23 is three small-range standard transducers; 24 is supporting component; 25 is lower connecting plate.
Fig. 3 is the of the present invention 3 test schematic diagram taking advantage of 3 formula, 3 dynamometry barycenter platform systems.
Embodiment
Take advantage of 3 formula, 3 dynamometry barycenter platform systems to be described in detail referring to accompanying drawing to of the present invention 3, but this description is only exemplary, is not intended to carry out any restriction to protection scope of the present invention.
Illustratively describe of the present invention 3 with reference to Fig. 1, Fig. 1 and take advantage of 3 formula, 3 dynamometry barycenter platform systems.This dynamometry barycenter platform comprises upper table surface 1, sensor combinations body 3, supplemental support 4 and following table 2, upper table surface 1 structure is steel combined with aluminum table top, steel table top provides the connecting interface of test specimen and its upper surface, it is lower is aluminium table top, by carrying test specimen weight accurate transfer on three sensor combinations bodies of the same circumferentially distribution in 120o angle.Weight accurate transfer on the small-range standard transducer of the same circumferentially distribution in 120o angle, is carried out quality center of mass position calculation by sensor combinations body 3 by sensor combinations body 3.The impact failure sensor that supplemental support 4 prevents when lifting upper barycenter platform for test specimen and frock, the transverse force prevented causes the skew etc. of barycenter platform position.Fixing for sensor combinations body 3 and supplemental support 4 of following table 2.
Sensor combinations body 3 is made up of main supporting component 21, upper junction plate 22, small-range standard transducer 23 and supporting component 24 thereof, lower connecting plate 25, schematic diagram as shown in Figure 2, wherein, main supporting component 21 comprises lifting regulating mechanism, steel ball and supporting seat three parts, lifting regulating mechanism and barycenter platform upper table surface lower surface are spirally connected, steel ball contacts with lifting regulating mechanism lower surface ball-and-socket, is delivered on upper junction plate 22 by barycenter supporting seat that platform is forced through.Power suffered by it, as the load parts of sensor combinations body, is on average decomposed three small-range standard transducer 23(range 2200kg, precision 0.01% by upper junction plate 22) on; Three small-range standard transducers 23 and supporting component 24 thereof are the distribution of 120o angle at same circumference.Lower connecting plate 25 is connected with barycenter platform following table, is mainly used in the installation of small-range standard transducer, adjustment and fixes.Weight accurate transfer on the small-range standard transducer of the same circumferentially distribution in 120o angle, is carried out quality center of mass position calculation by sensor combinations body.
Fig. 3 is the of the present invention 3 test schematic diagram taking advantage of 3 formula, 3 dynamometry barycenter platform systems, and quality center of mass method of testing of the present invention is as follows:
Measure the output of 9 small-range standard transducers, utilize formula (1) to calculate the mass M of Large Spacecraft.
----------（1）
In formula: P
11~ P
33be respectively the test mass of 9 small-range standard transducers.
Utilize the barycenter Y of formula (2), (3) calculating Large Spacecraft
cand Z
c.
-----------（2）
-----------（3）
In formula: R is sensor combinations body distribution radius of a circle.
Although be described in detail the specific embodiment of the present invention above and illustrate, but what should indicate is, we can make various changes and modifications above-mentioned embodiment, but these do not depart from spirit of the present invention and the scope described in appended claim.
Claims (4)
1. take advantage of 3 dynamometry barycenter platform systems of 3 formulas for 3 of Large Spacecraft quality center of mass measurement for one kind, comprise the upper table surface for carrying test specimen weight, three sensor combinations bodies, supplemental support and the following table for fixation of sensor assembly and supplemental support, three sensor combinations bodies and supplemental support are arranged between upper table surface and following table, supplemental support prevents to impact and transverse force when being used for the upper table surface of test specimen and/or the upper barycenter platform of frock lifting, upper platform structure is steel combined with aluminum table top, steel table top provides the connecting interface of carrying test specimen and its upper surface, it is lower is aluminium table top, by carrying test specimen weight accurate transfer on three sensor combinations bodies of the same circumferentially distribution in hexagonal angle, wherein, each sensor combinations body is by main supporting component, upper junction plate, three small-range standard transducers and supporting component thereof and lower connecting plate composition, main supporting component comprises the lifting regulating mechanism being screwed onto upper table surface lower surface and regulating upper table surface to move up and down, the supporting seat of steel ball and support steel ball, steel ball contacts with lifting regulating mechanism lower surface ball-and-socket, the supporting seat that upper surface is forced through of barycenter platform upper table surface is delivered on upper junction plate, power suffered by it, as the load parts of small-range standard transducer, on average decomposes on it by upper junction plate, three small-range standard transducers carry upper junction plate by supporting component, and circumferentially distribute in hexagonal angle same with supporting component, lower connecting plate is connected on barycenter platform following table, for the installation of small-range standard transducer, adjustment and fixing, wherein, small-range standard transducer is the standard transducer of range 2200kg, precision 0.01%, and described Large Spacecraft refers to that weight reaches the spacecraft of 17000kg.
2. 3 dynamometry barycenter platform systems according to claim 1, wherein, upper and lower web joint is the set square of same shape, and three small-range standard transducers are L-shaped, and the long limit of L shape is parallel with three limits of set square respectively.
3. 3 dynamometry barycenter platform systems described in claim 1 or 2, wherein, the quantity of supplemental support is three, is arranged on equally samely circumferentially to support upper table surface.
4. 3 dynamometry barycenter platform systems described in claim 1 or 2, wherein, three small-range standard transducers of each sensor combinations body are connected to accordingly on corresponding measuring instrument and carry out quality center of mass position calculation.
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| RU2593644C2 (en) * | 2012-11-06 | 2016-08-10 | Открытое акционерное общество "Информационные спутниковые системы" имени академика М.Ф. Решетнёва" | Stand for determining mass and coordinates of centre of mass of article |
| CN103592078B (en) * | 2013-11-28 | 2016-01-06 | 航天科工哈尔滨风华有限公司 | A kind of large-size large-tonnage cylindrical shape or the radial centroid measurement instrument of cylindrical work |
| CN103604469A (en) * | 2013-12-06 | 2014-02-26 | 郑州机械研究所 | Mass and mass center measuring system with redundancy function |
| CN105466635B (en) * | 2015-11-23 | 2018-04-17 | 上海卫星装备研究所 | Quality center of mass applied to spacecraft tests system |
| CN105806562B (en) * | 2016-05-16 | 2018-08-31 | 北京航天发射技术研究所 | A kind of quality center of mass supported at three point redundant measurement equipment |
| CN106153253A (en) * | 2016-06-16 | 2016-11-23 | 上海交通大学 | Disk-shaped part center mass measuring device and measuring method |
| CN108051142B (en) * | 2017-11-30 | 2019-07-05 | 北京卫星环境工程研究所 | 3 force-measuring type centroid measurement platform multistage integral calibrating methods |
| CN108007643A (en) * | 2018-01-22 | 2018-05-08 | 北京卫星环境工程研究所 | Multiple spot cloth standing posture center mass measuring device and measuring method |
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| US5081865A (en) * | 1990-06-29 | 1992-01-21 | The United States Of America As Represented By The Secretary Of The Air Force | Center of gravity locating method |
| JPH04283638A (en) * | 1991-03-12 | 1992-10-08 | Ishikawajima Kensa Keisoku Kk | Apparatus for measuring center of gravity |
| CN101398339B (en) * | 2008-10-23 | 2010-07-07 | 北京星达技术开发公司 | Component quality characteristic integration test equipment and test method |
| CN201497612U (en) * | 2009-08-22 | 2010-06-02 | 襄樊达安汽车检测中心 | Mass center position measuring device for power assembly of vehicle |
| CN102169040B (en) * | 2010-11-23 | 2012-11-14 | 中国航天科技集团公司第四研究院第四十四研究所 | Device for measuring quality center of mass by composite range sensor in cross-measuring range |
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