CN103353374A - 3*3 type three-point dynamometric center-of-mass table system - Google Patents
3*3 type three-point dynamometric center-of-mass table system Download PDFInfo
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- CN103353374A CN103353374A CN2013102890287A CN201310289028A CN103353374A CN 103353374 A CN103353374 A CN 103353374A CN 2013102890287 A CN2013102890287 A CN 2013102890287A CN 201310289028 A CN201310289028 A CN 201310289028A CN 103353374 A CN103353374 A CN 103353374A
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Abstract
The invention discloses a 3*3 type three-point dynamometric center-of-mass table system, which is prepared by combining multiple sensors. Three sensors with low standard measuring ranges are combined to form a sensor assembly with a higher precision and a non-standard measuring range; and three sensor assemblies with non-standard measuring ranges are assembled to form a center-of-mass table with a wide measuring range. According to the invention, errors caused by non-linear bearing of the sensors during multi-point test are prevented, and relatively large redundancy of measuring range and low precision caused by selection of wide-range sensors are avoided.
Description
Technical field
The invention belongs to the spacecraft technical field of measurement and test, specifically, relate to a kind of system for the measurement of Large Spacecraft quality center of mass.
Background technology
The mass property parameter is the object a series of mechanics parameters relevant with quality.Mass property comprises quality, centroid position, with respect to moment of inertia and the product of inertia of given coordinate system, be the basic inherent characteristic parameter of describing the product mechanical characteristic.In the development of spacecraft, need to determine these parameters by test, and according to designing requirement these parameters be carried out necessary adjustment.
3 at present domestic force-measuring type barycenter testing apparatus ranges are lower, can not satisfy Large Spacecraft quality center of mass test assignment (such as weight 17000kg, weighing precision 1kg, torgue measurement precision 1kgm).In order to enlarge the testing range of barycenter platform, if the sensor of selection standard wide range (range 10000kg, precision 0.03%) then can produce larger range redundant (range is 3*10000=30000kg), and measuring accuracy lower (weighing precision 7.4kg, torgue measurement precision 4.2kgm).If select multiple spot (greater than 3 points) to survey centroid method, can cause the non-linear force of sensor because sensor is out of shape the factors such as inconsistent or the distortion of barycenter platform table top, produce larger error even mistake.Therefore, can realize that the testing apparatus that wide range, high precision barycenter are measured becomes the bottleneck that domestic barycenter power of test improves.
Summary of the invention
In order to satisfy wide range, high-precision barycenter testing requirement, the inventor improves existing 3 dynamometry modes dexterously, by circumferentially three satellite force-detecting positions being set replaces this force-detecting position together in its vicinity as the center of circle take former force-detecting position, thereby finished the present invention.
Of the present invention 3 take advantage of 3 dynamometry barycenter of 3 formulas platform system, comprise the upper table surface for carrying test specimen weight, three sensor combinations bodies, supplemental support reaches the following table that is used for fixation of sensor assembly and supplemental support, three sensor combinations bodies and supplemental support are arranged between upper table surface and the 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, the upper table surface structure is the steel combined with aluminum table top, the steel table top provides the connecting interface of carrying test specimen and its upper surface, it is lower to be the aluminium table top, carrying test specimen weight accurate transfer is on three sensor combinations bodies of 120o angle distribution to same circumference, 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 form, main supporting component comprises that being screwed onto the upper table surface lower surface regulates the lifting regulating mechanism that upper table surface moves 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, is delivered on the upper junction plate by supporting seat the upper surface of barycenter platform upper table surface institute is stressed; Upper junction plate is as the load parts of small-range standard transducer, and the power that it is suffered on average decomposes on it; Three small-range standard transducers carry upper junction plate by supporting component, and are the distribution of 120o angle with supporting component at same circumference; Lower connecting plate is connected on the barycenter platform following table, with installation, the adjustment and fixing that is used for the small-range standard transducer.
Wherein, the small-range standard transducer is the standard transducer of range 2200kg, precision 0.01%.
Wherein, upper lower connecting plate is identical shaped set square, and three small-range standard transducers are L-shaped, and L shaped long limit is parallel respectively with three limits of set square.
Wherein, the quantity of supplemental support also is three, is arranged on equally on the same circumference upper table surface is supported.
Wherein, three of each sensor combinations body small-range standard transducers are connected to accordingly and carry out the quality center of mass position calculation on the corresponding measuring instrument.
The invention has the advantages that, the sensor combinations body structure that the small-range standard transducer that arranges by three concentrics consists of, enlarged the measurement range (range 19800kg) of barycenter platform, guaranteed higher precision (quality precision 1kg, torque accuracy 1kgm), satisfy the Large Spacecraft quality center of mass and measured needs.
Description of drawings
Fig. 1 of the present invention 3 takes advantage of the synoptic diagram of 3 dynamometry barycenter of 3 formulas platform system;
Wherein, 1 is upper table surface; 2 is following table; 3 is the sensor combinations body; 4 is supplemental support.
Fig. 2 of the present invention 3 takes advantage of the structural representation of sensor combinations body in 3 dynamometry barycenter of 3 formulas platform system;
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 of the present invention 3 takes advantage of the test synoptic diagram of 3 dynamometry barycenter of 3 formulas platform system.
Embodiment
Take advantage of 3 dynamometry barycenter of 3 formulas platform system to be elaborated referring to accompanying drawing to of the present invention 3, but this description only is exemplary, is not intended to protection scope of the present invention is carried out any restriction.
With reference to Fig. 1, illustrated that Fig. 1 example of the present invention 3 take advantage of 3 dynamometry barycenter of 3 formulas platform system.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 the steel combined with aluminum table top, the steel table top provides the connecting interface of test specimen and its upper surface, it is lower to be the aluminium table top, and carrying test specimen weight accurate transfer is on three sensor combinations bodies of 120o angle distribution to same circumference.Sensor combinations body 3 is the weight accurate transfer on the small-range standard transducer of 120o angle distribution to same circumference, carries out the quality center of mass position calculation by sensor combinations body 3.The impact failure sensor that supplemental support 4 prevents when being used for test specimen and the upper barycenter platform of frock lifting, the transverse force that prevents causes the skew of barycenter platform position etc.Following table 2 is used for the fixing of sensor combinations body 3 and supplemental support 4.
Sensor combinations body 3 is comprised of main supporting component 21, upper junction plate 22, small-range standard transducer 23 and supporting component 24 thereof, lower connecting plate 25, synoptic diagram as shown in Figure 2, wherein, main supporting component 21 comprises lifting regulating mechanism, steel ball and three parts of supporting seat, 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 the upper junction plate 22 by supporting seat barycenter platform institute is stressed.Upper junction plate 22 is as the load parts of sensor combinations body, and the power that it is suffered on average decomposes three small-range standard transducer 23(range 2200kg, precision 0.01%) on; Three small-range standard transducers 23 and supporting component 24 thereof are the 120o angle at same circumference and distribute.Lower connecting plate 25 is connected with barycenter platform following table, is mainly used in installation, the adjustment and fixing of small-range standard transducer.The sensor combinations body is the weight accurate transfer on the small-range standard transducer of 120o angle distribution to same circumference, carries out the quality center of mass position calculation.
Fig. 3 of the present invention 3 takes advantage of the test synoptic diagram of 3 dynamometry barycenter of 3 formulas platform system, 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 the formula: P
11~ P
33Be respectively the test mass of 9 small-range standard transducers.
Utilize formula (2), (3) to calculate the barycenter Y of Large Spacecraft
CAnd Z
C
-----------（3）
In the formula: R is sensor combinations body distribution radius of a circle.
Although above the specific embodiment of the present invention is described in detail and illustrates, but what should indicate is, we can make various changes and modifications above-mentioned embodiment, but these do not break away from the scope that spirit of the present invention and appended claim are put down in writing.
Claims (5)
1. take advantage of 3 dynamometry barycenter platform systems of 3 formulas for one kind 3, comprise the upper table surface for carrying test specimen weight, three sensor combinations bodies, supplemental support reaches the following table that is used for fixation of sensor assembly and supplemental support, three sensor combinations bodies and supplemental support are arranged between upper table surface and the 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, the upper table surface structure is the steel combined with aluminum table top, the steel table top provides the connecting interface of carrying test specimen and its upper surface, it is lower to be the aluminium table top, carrying test specimen weight accurate transfer is on three sensor combinations bodies of 120o angle distribution to same circumference, 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 form, main supporting component comprises that being screwed onto the upper table surface lower surface regulates the lifting regulating mechanism that upper table surface moves 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, is delivered on the upper junction plate by supporting seat the upper surface of barycenter platform upper table surface institute is stressed; Upper junction plate is as the load parts of small-range standard transducer, and the power that it is suffered on average decomposes on it; Three small-range standard transducers carry upper junction plate by supporting component, and are the distribution of 120o angle with supporting component at same circumference; Lower connecting plate is connected on the barycenter platform following table, with installation, the adjustment and fixing that is used for the small-range standard transducer.
2. 3 dynamometry barycenter platform systems claimed in claim 1, wherein, the small-range standard transducer is the standard transducer of range 2200kg, precision 0.01%.
3. claim 1 or 2 described 3 dynamometry barycenter platform systems, wherein, upper lower connecting plate is identical shaped set square, and three small-range standard transducers are L-shaped, L shaped long limit is parallel respectively with three limits of set square.
4. claim 1 or 2 described 3 dynamometry barycenter platform systems, wherein, the quantity of supplemental support is three, is arranged on equally on the same circumference upper table surface is supported.
5. claim 1 or 2 described 3 dynamometry barycenter platform systems, wherein, three small-range standard transducers of each sensor combinations body are connected to accordingly and carry out the quality center of mass position calculation on the corresponding measuring instrument.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592078A (en) * | 2013-11-28 | 2014-02-19 | 航天科工哈尔滨风华有限公司 | Large-size large-tonnage cylindrical or column-shaped workpiece radial mass center measuring instrument |
| CN103604469A (en) * | 2013-12-06 | 2014-02-26 | 郑州机械研究所 | Mass and mass center measuring system with redundancy function |
| CN105466635A (en) * | 2015-11-23 | 2016-04-06 | 上海卫星装备研究所 | Novel mass and center of mass test system used for spacecraft |
| CN105806562A (en) * | 2016-05-16 | 2016-07-27 | 北京航天发射技术研究所 | Mass and center three-point supporting redundancy measuring equipment |
| 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 |
| CN106153253A (en) * | 2016-06-16 | 2016-11-23 | 上海交通大学 | Disk-shaped part center mass measuring device and measuring method |
| 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 |
| CN108051142A (en) * | 2017-11-30 | 2018-05-18 | 北京卫星环境工程研究所 | 3 force-measuring type centroid measurement platform multistage integral calibrating methods |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN106153253A (en) * | 2016-06-16 | 2016-11-23 | 上海交通大学 | Disk-shaped part center mass measuring device and measuring method |
| CN108051142A (en) * | 2017-11-30 | 2018-05-18 | 北京卫星环境工程研究所 | 3 force-measuring type centroid measurement platform multistage integral calibrating methods |
| 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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