CN102323007A - Flutter model center of gravity positioner - Google Patents
Flutter model center of gravity positioner Download PDFInfo
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- CN102323007A CN102323007A CN201110232713A CN201110232713A CN102323007A CN 102323007 A CN102323007 A CN 102323007A CN 201110232713 A CN201110232713 A CN 201110232713A CN 201110232713 A CN201110232713 A CN 201110232713A CN 102323007 A CN102323007 A CN 102323007A
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Abstract
The invention belongs to aviation measurement technology, and relates to a flutter model center of gravity positioner. The flutter model center of gravity positioner is characterized by comprising a bearing framework, two level meters (7), a center of gravity positioning assembly (8), two model spacing assemblies (9) and a center of gravity locating lever (10). The flutter model center of gravity positioner has the characteristics of a small error of a measured value and small discreteness. By utilizing a static balance principle and a model spacing device to restricting degree of freedom of model rotation, by utilizing the center of gravity locating lever to substitute a plumb, measurement stability is effectively guaranteed.
Description
Technical field
The invention belongs to the airborne survey technology, relate to a kind of flutter model center of gravity locating device.
Background technology
Focus position data is extremely important as far as flutter model, is directly connected to the accuracy of the true aircraft of simulation.But, never have the equipment that a cover specialty is measured the flutter model centre of gravity place for a long time.Can only rely on simple " suspension method " to measure the center of gravity of flutter model at present; Flutter model is hung up with the fine rule single-point; After model was static, the fine rule of the lift heavy that hangs down in sling point position hammer utilized the conllinear principle to obtain the relative centre of gravity place line of model.The conversion hoisting point position repeats above-mentioned steps, obtains the relative centre of gravity place line of second, and the intersection point of getting these two relative centre of gravity place lines is relative centre of gravity place.This measuring method, the sum of errors discreteness of operational measure value is very big.
Summary of the invention
The objective of the invention is: the little flutter model center of gravity locating device of sum of errors discreteness that proposes a kind of measured value.
Technical solution of the present invention is: a kind of flutter model center of gravity locating device is characterized in that it is made up of load-bearing frame, two level meters 7, center of gravity positioning component 8, two model limit assemblies 9 and center of gravity backstay 10;
(1) load-bearing frame is made up of with rectangular base plate 1 identical top board 2, four root posts 3 and four adjustable support legs 4 rectangular base plate 1, size; Four root posts 3 are parallel to each other; The lower end of four root posts 3 respectively with four jiaos of rectangular base plate 1 through bolt or be welded to connect and be integral body; The upper end of four root posts 3 respectively with four jiaos of top board 2 through bolt or be welded to connect and be integral body, hook is installed on the top board center, four adjustable support legs 4 are installed in four jiaos of rectangular base plate 1 lower surface; The center of gravity backstay chute 11 of run-through board face that a broad ways stretches, vertical is arranged at the center of base plate 1 length direction, and the xsect of center of gravity backstay chute 11 is an inverted T-shaped, along the length direction and the Width of base plate 1 level meter 7 is installed respectively;
(2) center of gravity positioning component 8 is made up of two identical back vertical plate 8a, transverse slat 8b, pilot pin assembly 8c and band handle bolt 8f of structure; Back vertical plate 8a is a rectangular slab; The upper surface of the downside of back vertical plate 8a and base plate 1 perhaps is welded to connect through bolt and is integral body; The length direction of back vertical plate 8a is vertical with base plate 1; Two back vertical plate 8a lay respectively at base plate 1 near antemarginal both sides and position symmetry, and the plate face coplane of two back vertical plate 8a has the transverse slat through hole of a vertical run-through board face in the plate face middle and upper part of back vertical plate 8a; Transverse slat 8b is a rectangular slab; In the both sides of transverse slat 8b length direction a locking screw pit is arranged respectively, that vertically stretch, as to connect a pilot pin gathering sill 8d is arranged on transverse slat 8b, the position of two locking screw pits respectively with two back vertical plate 8a on the position of transverse slat through hole corresponding; Be screwed in two locking screw pits on the transverse slat 8b after two band handle bolt 8f pass two transverse slat through holes respectively, transverse slat 8b is fixed on the back vertical plate 8a; Pilot pin assembly 8c is made up of pilot pin 8c1, positioning round table 8c2, thread segment 8c 3 and set nut 8c4; Pilot pin 8c1 is the round bar of a head band point; The front surface center of positioning round table 8c2 and the rear end of pilot pin 8c1 are connected to integral body; The back centre of surface of the front end of thread segment 8c 3 and positioning round table 8c2 is connected to integral body, and the rear end of thread segment 8c 3 combines with clamp nut 8c4 after passing pilot pin gathering sill 8d backward in the past, and pilot pin assembly 8c is vertically fixed on the transverse slat 8b;
(3) model limit assembly 9 is made up of cant board 9a and two gag lever post assemblies; Cant board 9a is a rectangular slab, and lower surface and base plate 1 are linked as integral body, and the length direction of cant board 9a is vertical with base plate; The through hole that two horizontal arrangement are arranged in the middle and upper part of cant board; But the gag lever post assembly is made up of gag lever post 9c and locking axle sleeve 9b, but locking axle sleeve 9b be installed in the above-mentioned through hole, but gag lever post 9c passes the center pit of locking axle sleeve 9b and keeps clearance fit; The structure of two model limit assemblies 9 is identical; Two model limit assemblies 9 lay respectively at the both sides of base plate 1 length direction, and the plate face of model limit assembly 9 is parallel with the Width of base plate 1, the position symmetry of two model limit assemblies 9;
(4) center of gravity backstay 10 is made up of backstay 10a, inverted T-shaped web member and attaching nut 10d; Backstay 10a is an oval bar, and there is external thread its lower end, and the hypomere of inverted T-shaped web member is square countersunk head 10b; The length of side of square countersunk head 10b is slightly less than the width of the horizontal segment of center of gravity backstay chute 11 inverted T-shapeds; The epimere of inverted T-shaped web member is the cylinder 10c that has internal and external screw thread, and the center of the lower end of this cylinder 10c and square countersunk head 10b upper surface is connected to integral body, and cylinder 10c combines with attaching nut 10d behind the vertical section of centroidal backstay chute 11 inverted T-shapeds from bottom to top; The inverted T-shaped web member is fixed on the base plate 1; The hypomere of inverted T-shaped web member is positioned at the horizontal segment of center of gravity backstay chute 11 inverted T-shapeds, and the external thread of backstay 10a lower end is screwed in the threaded hole of inverted T-shaped web member epimere, and backstay 10a is perpendicular to base plate 1.
Advantage of the present invention is: the sum of errors discreteness of measured value is very little; Flutter model center of gravity locating device of the present invention utilizes the statical equilibrium principle, and utilizes model stop means limited model rotational freedom; Utilize the center of gravity backstay to replace vertical, effectively guaranteed measurement stability.
Description of drawings
Fig. 1 is an axle side structure synoptic diagram of the present invention.
Fig. 2 is the shaft side figure at Fig. 1 back side.
The structural representation of pilot pin among Fig. 3 the present invention.
Fig. 4 is the structural representation of center of gravity backstay 10.
Embodiment
Explain further details in the face of the present invention down.Referring to Fig. 1 to Fig. 4, a kind of flutter model center of gravity locating device is characterized in that, it is made up of load-bearing frame, two level meters 7, center of gravity positioning component 8, two model limit assemblies 9 and center of gravity backstay 10;
(1) load-bearing frame is made up of with rectangular base plate 1 identical top board 2, four root posts 3 and four adjustable support legs 4 rectangular base plate 1, size; Four root posts 3 are parallel to each other; The lower end of four root posts 3 respectively with four jiaos of rectangular base plate 1 through bolt or be welded to connect and be integral body; The upper end of four root posts 3 respectively with four jiaos of top board 2 through bolt or be welded to connect and be integral body, hook is installed on the top board center, four adjustable support legs 4 are installed in four jiaos of rectangular base plate 1 lower surface; The center of gravity backstay chute 11 of run-through board face that a broad ways stretches, vertical is arranged at the center of base plate 1 length direction, and the xsect of center of gravity backstay chute 11 is an inverted T-shaped, along the length direction and the Width of base plate 1 level meter 7 is installed respectively;
(2) center of gravity positioning component 8 is made up of two identical back vertical plate 8a, transverse slat 8b, pilot pin assembly 8c and band handle bolt 8f of structure; Back vertical plate 8a is a rectangular slab; The upper surface of the downside of back vertical plate 8a and base plate 1 perhaps is welded to connect through bolt and is integral body; The length direction of back vertical plate 8a is vertical with base plate 1; Two back vertical plate 8a lay respectively at base plate 1 near antemarginal both sides and position symmetry, and the plate face coplane of two back vertical plate 8a has the transverse slat through hole of a vertical run-through board face in the plate face middle and upper part of back vertical plate 8a; Transverse slat 8b is a rectangular slab; In the both sides of transverse slat 8b length direction a locking screw pit is arranged respectively, that vertically stretch, as to connect a pilot pin gathering sill 8d is arranged on transverse slat 8b, the position of two locking screw pits respectively with two back vertical plate 8a on the position of transverse slat through hole corresponding; Be screwed in two locking screw pits on the transverse slat 8b after two band handle bolt 8f pass two transverse slat through holes respectively, transverse slat 8b is fixed on the back vertical plate 8a; Pilot pin assembly 8c is made up of pilot pin 8c1, positioning round table 8c2, thread segment 8c 3 and set nut 8c4; Pilot pin 8c1 is the round bar of a head band point; The front surface center of positioning round table 8c2 and the rear end of pilot pin 8c1 are connected to integral body; The back centre of surface of the front end of thread segment 8c 3 and positioning round table 8c2 is connected to integral body, and the rear end of thread segment 8c 3 combines with clamp nut 8c4 after passing pilot pin gathering sill 8d backward in the past, and pilot pin assembly 8c is vertically fixed on the transverse slat 8b;
(3) model limit assembly 9 is made up of cant board 9a and two gag lever post assemblies; Cant board 9a is a rectangular slab, and lower surface and base plate 1 are linked as integral body, and the length direction of cant board 9a is vertical with base plate; The through hole that two horizontal arrangement are arranged in the middle and upper part of cant board; But the gag lever post assembly is made up of gag lever post 9c and locking axle sleeve 9b, but locking axle sleeve 9b be installed in the above-mentioned through hole, but gag lever post 9c passes the center pit of locking axle sleeve 9b and keeps clearance fit; The structure of two model limit assemblies 9 is identical; Two model limit assemblies 9 lay respectively at the both sides of base plate 1 length direction, and the plate face of model limit assembly 9 is parallel with the Width of base plate 1, the position symmetry of two model limit assemblies 9;
(4) center of gravity backstay 10 is made up of backstay 10a, inverted T-shaped web member and attaching nut 10d; Backstay 10a is an oval bar, and there is external thread its lower end, and the hypomere of inverted T-shaped web member is square countersunk head 10b; The length of side of square countersunk head 10b is slightly less than the width of the horizontal segment of center of gravity backstay chute 11 inverted T-shapeds; The epimere of inverted T-shaped web member is the cylinder 10c that has internal and external screw thread, and the center of the lower end of this cylinder 10c and square countersunk head 10b upper surface is connected to integral body, and cylinder 10c combines with attaching nut 10d behind the vertical section of centroidal backstay chute 11 inverted T-shapeds from bottom to top; The inverted T-shaped web member is fixed on the base plate 1; The hypomere of inverted T-shaped web member is positioned at the horizontal segment of center of gravity backstay chute 11 inverted T-shapeds, and the external thread of backstay 10a lower end is screwed in the threaded hole of inverted T-shaped web member epimere, and backstay 10a is perpendicular to base plate 1.
Principle of work of the present invention is: through flutter model center of gravity locating device, and with center of gravity backstay 10, center of gravity pilot pin assembly 8, the flutter model messenger wire places in the same perpendicular, has avoided human error.
Measuring method of the present invention is:
(1) regulating adjustable support leg 4 makes two level meters be in level simultaneously
(2) choose a point on the flutter model as suspension centre, fasten cord;
(3) cord is tied up on the hook on the top board 2, the fine setting hanging point position makes pilot pin and backstay hang fine rule coplane, the fixedly position of hanging point;
(4) limit assembly that uses a model makes flutter model stop operating in the equipoise;
(5) slide up and down pilot pin, make pilot pin on flutter model, stay mark line 1;
(6) change suspension centre,, obtain mark line 2,3 according to step 2～5;
(7) intersection point of any two mark lines is relative focus point, and the another one intersection point is used to revise measurement result.
Claims (1)
1. a flutter model center of gravity locating device is characterized in that, it is made up of load-bearing frame, two level meters [7], center of gravity positioning component [8], two model limit assemblies [9] and center of gravity backstay [10];
(1) load-bearing frame is made up of rectangular base plate [1], top board [2], four root posts [3] and four adjustable support legs [4] that size is identical with rectangular base plate [1]; Four root posts [3] are parallel to each other; The lower end of four root posts [3] respectively with four jiaos of rectangular base plate [1] through bolt or be welded to connect and be integral body; The upper end of four root posts [3] respectively with four jiaos of top board [2] through bolt or be welded to connect and be integral body; Hook is installed on the top board center, and four adjustable support legs [4] are installed in four jiaos of rectangular base plate [1] lower surface; The center of gravity backstay chute [11] that run-through board face that a broad ways stretches, vertical is arranged at the center of base plate [1] length direction; The xsect of center of gravity backstay chute [11] is an inverted T-shaped, along the length direction and the Width of base plate [1] level meter [7] is installed respectively;
(2) center of gravity positioning component [8] is made up of two identical back vertical plate [8a], transverse slat [8b], pilot pin assembly [8c] and band handle bolts [8f] of structure; Back vertical plate [8a] is a rectangular slab; The upper surface of the downside of back vertical plate [8a] and base plate [1] perhaps is welded to connect through bolt and is integral body; The length direction of back vertical plate [8a] is vertical with base plate [1]; Two back vertical plates [8a] lay respectively at base plate [1] near antemarginal both sides and position symmetry, and the plate face coplane of two back vertical plates [8a] has the transverse slat through hole of a vertical run-through board face in the plate face middle and upper part of back vertical plate [8a]; Transverse slat [8b] is a rectangular slab; Respectively there is a locking screw pit both sides at transverse slat [8b] length direction, and that vertically stretch, as to connect a pilot pin gathering sill [8d] is arranged on transverse slat [8b], the position of two locking screw pits respectively with two back vertical plates [8a] on the position of transverse slat through hole corresponding; Be screwed in two locking screw pits on the transverse slat [8b] after two band handle bolts [8f] pass two transverse slat through holes respectively, transverse slat [8b] is fixed on the back vertical plate [8a]; Pilot pin assembly [8c] is made up of pilot pin [8c1], positioning round table [8c2], thread segment [8c 3] and set nut [8c4]; Pilot pin [8c1] is the round bar of a head band point; The rear end of the front surface center of positioning round table [8c2] and pilot pin [8c1] is connected to integral body; The front end of thread segment [8c 3] and the back centre of surface of positioning round table [8c2] are connected to integral body; The rear end of thread segment [8c 3] is passed pilot pin gathering sill [8d] back in the past backward and is combined with clamp nut [8c4], and pilot pin assembly [8c] is vertically fixed on the transverse slat [8b];
(3) model limit assembly [9] is made up of cant board [9a] and two gag lever post assemblies; Cant board [9a] is a rectangular slab, and lower surface and base plate [1] are linked as integral body, and the length direction of cant board [9a] is vertical with base plate; The through hole that two horizontal arrangement are arranged in the middle and upper part of cant board; The gag lever post assembly by gag lever post [9c] but and locking axle sleeve [9b] form, but locking axle sleeve [9b] be installed in the above-mentioned through hole, gag lever post [9c] but pass the center pit of locking axle sleeve [9b] and keep clearance fit; The structure of two model limit assemblies [9] is identical; Two model limit assemblies [9] lay respectively at the both sides of base plate [1] length direction, and the plate face of model limit assembly [9] is parallel with the Width of base plate [1], the position symmetry of two model limit assemblies [9];
(4) center of gravity backstay [10] is made up of backstay [10a], inverted T-shaped web member and attaching nut [10d]; Backstay [10a] is an oval bar; There is external thread its lower end; The hypomere of inverted T-shaped web member is square countersunk head [10b], and the length of side of square countersunk head [10b] is slightly less than the width of the horizontal segment of center of gravity backstay chute [11] inverted T-shaped, and the epimere of inverted T-shaped web member is the cylinder [10c] that has internal and external screw thread; The center of lower end of this cylinder [10c] and square countersunk head [10b] upper surface is connected to integral body; Cylinder [10c] combines with attaching nut [10d] behind the vertical section of centroidal backstay chute [11] inverted T-shaped from bottom to top, and the inverted T-shaped web member is fixed on the base plate [1], and the hypomere of inverted T-shaped web member is positioned at the horizontal segment of center of gravity backstay chute [11] inverted T-shaped; The external thread of backstay [10a] lower end is screwed in the threaded hole of inverted T-shaped web member epimere, and backstay [10a] is perpendicular to base plate [1].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110232713 CN102323007B (en) | 2011-08-15 | 2011-08-15 | Flutter model center of gravity positioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110232713 CN102323007B (en) | 2011-08-15 | 2011-08-15 | Flutter model center of gravity positioner |
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| CN102323007A true CN102323007A (en) | 2012-01-18 |
| CN102323007B CN102323007B (en) | 2013-05-08 |
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| CN 201110232713 Active CN102323007B (en) | 2011-08-15 | 2011-08-15 | Flutter model center of gravity positioner |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106482897A (en) * | 2016-11-18 | 2017-03-08 | 安徽江淮汽车集团股份有限公司 | A kind of measuring method of the mass centre of Special-shaped object |
| CN109341949A (en) * | 2018-09-03 | 2019-02-15 | 南京理工大学 | A kind of big object hanging method check weighing center device of experiment of machanics |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI490018B (en) * | 2013-08-20 | 2015-07-01 | Fong Bong Entpr Co Ltd | Adjusting device for calibrating center of gravity of remote control aircraft |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1855397A (en) * | 1930-12-15 | 1932-04-26 | Gustave T Johnson | Balancing machine |
| FR1380683A (en) * | 1963-10-22 | 1964-12-04 | Apparatus for measuring the moment of inertia of a body with respect to an axis | |
| CN1904573A (en) * | 2006-08-10 | 2007-01-31 | 郑州机械研究所 | Measuring mechanism used for measuring substance mass center, shape center and mass center deviation |
| CN101413840A (en) * | 2007-12-27 | 2009-04-22 | 奇瑞汽车股份有限公司 | Device and method for measuring object mass center |
| CN201327433Y (en) * | 2008-11-28 | 2009-10-14 | 中国航天空气动力技术研究院 | Centroid measuring device for unmanned aerial vehicles |
-
2011
- 2011-08-15 CN CN 201110232713 patent/CN102323007B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1855397A (en) * | 1930-12-15 | 1932-04-26 | Gustave T Johnson | Balancing machine |
| FR1380683A (en) * | 1963-10-22 | 1964-12-04 | Apparatus for measuring the moment of inertia of a body with respect to an axis | |
| CN1904573A (en) * | 2006-08-10 | 2007-01-31 | 郑州机械研究所 | Measuring mechanism used for measuring substance mass center, shape center and mass center deviation |
| CN101413840A (en) * | 2007-12-27 | 2009-04-22 | 奇瑞汽车股份有限公司 | Device and method for measuring object mass center |
| CN201327433Y (en) * | 2008-11-28 | 2009-10-14 | 中国航天空气动力技术研究院 | Centroid measuring device for unmanned aerial vehicles |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106482897A (en) * | 2016-11-18 | 2017-03-08 | 安徽江淮汽车集团股份有限公司 | A kind of measuring method of the mass centre of Special-shaped object |
| CN109341949A (en) * | 2018-09-03 | 2019-02-15 | 南京理工大学 | A kind of big object hanging method check weighing center device of experiment of machanics |
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| CN102323007B (en) | 2013-05-08 |
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