CN103630326A - Deformation-resisting measurement arm used in wind-tunnel balance body axis calibration and application of deformation-resisting measurement arm - Google Patents
Deformation-resisting measurement arm used in wind-tunnel balance body axis calibration and application of deformation-resisting measurement arm Download PDFInfo
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- CN103630326A CN103630326A CN201310679709.4A CN201310679709A CN103630326A CN 103630326 A CN103630326 A CN 103630326A CN 201310679709 A CN201310679709 A CN 201310679709A CN 103630326 A CN103630326 A CN 103630326A
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Abstract
The invention provides a deformation-resisting measurement arm used in wind-tunnel balance body axis calibration and an application of the deformation-resisting measurement arm. In the balance body axis calibration, a balance fixing end is connected with a balance base; a balance model end is connected with a loading beam and a force is applied to the loading beam to calibrate a balance. When the balance is subjected to the effect of the force, the balance deforms so as to change the position of the loading beam, at the same time, the balance needs to be adjusted to be at an original position to ensure that the force applied on the balance is not changed due to the change of the position of the loading beam. The deformation-resisting measurement arm comprises the loading beam (2), a laser reflection plate (4) and a measurement arm body (3); the measurement arm body comprises a laser range finder (5); the loading beam (2) is connected with the balance (1); the root part of the measurement arm body is connected with the root part of a beam arm of the loading beam; the laser reflection plate is connected with the tail end of the measurement arm body; a plate surface of the laser reflection plate (4) is mounted vertically and downwards; the laser range finder (5) is mounted on the fixed base and is used for emitting lasers to the laser reflection plate (4). The deformation-resisting measurement arm used in the wind-tunnel balance body axis calibration is used for laser ranging resetting in the wind-tunnel balance body axis calibration.
Description
Technical field
the present invention relates to the resistance to deformation gage beam of dummy vehicle in wind tunnel test in a kind of space industry, and the application in the calibration of wind-tunnel balance axon.
Background technology
wind-tunnel balance is mainly used in the dynamometry of dummy vehicle in wind tunnel test, balance precision is had relatively high expectations, accuracy is not less than 0.4%(rolling moment component and is not less than 0.5%), advanced index is not less than 0.1%(rolling moment component and is not less than 0.2%), this has just proposed higher requirement to the calibration of balance.
in the calibration of balance axon, balance stiff end is connected with balance pedestal, and balance model end is connected with loading beam, according to certain requirement, loading beam is applied to power, demarcates balance.Balance can deform when forces are applied, thereby causes loading beam position to change, and at this moment just balance need to be adjusted to initial position, to guarantee that the power that balance is subject to can not change because of the change of loading beam position.
in load hour, the distortion of loading beam is negligible, generally six laser ranging points is directly placed in to loading beam surface, gets final product parking position accuracy balance.
in order to coordinate the aerodynamic force demand that pressurized wind tunnel is larger, built the multi-functional large load static calibration of balance platform of pressurized wind tunnel, and designed a collection of large load balance, now half arm of loading beam has reached 3 meters, although loading beam stiffness is enough large, inevitably can produce certain distortion, if directly laser ranging point is placed in to loading beam surface, the measured deflection of laser range finder is a day stack for gentle loading beam distortion, but not balance distortion separately.Therefore cause reset not accurate enough, and then impact loading precision, cause balance calibration precision to decline.
Summary of the invention
the invention provides a kind of resistance to deformation gage beam, and the application in the calibration of wind-tunnel balance axon.
the present invention is mainly achieved by following technical proposals:
the resistance to deformation gage beam using in wind-tunnel balance axon calibration, comprises loading beam, laser reflection plate, gage beam body andbalance
, described gage beam body comprises laser range finder, describedloading beam is connected with balance
, described gage beam body root is connected with the beam arm root of described loading beam, and laser reflection plate is connected with described gage beam body tip, and described laser range finder is arranged on immobilizing foundation, and the laser vertical of generating laser transmitting is in laser reflection plate.
the described resistance to deformation gage beam using in the calibration of wind-tunnel balance axon, the direction that described laser reflection plate is larger with the beam arm distortion of described loading beam is vertical.
the described resistance to deformation gage beam using in the calibration of wind-tunnel balance axon, described loading beam is combined to form rood beam by girder, beam arm, described girder is connected with balance model end by balance mount pad, balance coupling sleeve, described gage beam body is connected with screw with beam arm root, and parallel with beam arm, but do not contact; Described laser reflection plate is arranged on the larger direction of beam arm distortion.
a kind of above-mentioned resistance to deformation gage beam is in the application in the calibration of wind-tunnel balance axon, described gage beam body extends out after being connected with loading beam beam arm root, during the beam arm stress deformation of loading beam, ignore beam arm root self-deformation, distortion is the displacement being caused by balance distortion, and now resistance to deformation gage beam, in free state, is not subject to loading beam deformation effect, by the laser reflection plate of gage beam end, realize Measurement accuracy and the accurate reset to balance to balance distortion.
beneficial effect:
the present invention mainly adopts loading beam center to draw the innovative approach of reset measurement point, and resistance to deformation gage beam, resets for laser ranging.
along with airplane design improves constantly the requirement of wind tunnel test data precision, wind tunnel test is towards the future development becoming more meticulous.As power/torque measuring device in wind tunnel test, the performance of wind-tunnel balance directly affects the accuracy of test figure.The invention provides effective solution path, having a extensive future of wind-tunnel balance axon calibration field.
structure of the present invention can be eliminated the impact for balance calibration by loading beam distortion, improves the precision of wind-tunnel balance axon calibration, thereby improves wind tunnel test data precision.
the present invention draws reset measurement point from loading beam center, and the distortion producing when the beam arm of evading loading beam is subject to more energetically has effectively improved the reset accuracy of balance axon calibration, thereby improved the precision of balance axon calibration.The present invention is successfully in the check of the loading beam by the multi-functional large load static calibration of balance platform of pressurized wind tunnel, and obtains good effect, successfully calibrated many large load balances that are applied to pressurized wind tunnel.
accompanying drawing explanation:
fig. 1 is that the installation of resistance to deformation gage beam and loading beam is related to schematic diagram.
wherein, the 1st, rod-type wind-tunnel balance, the 2nd, the beam arm of loading beam, the 3rd, resistance to deformation gage beam body, the 4th, laser reflection plate, the 5th, laser range finder.
embodiment:
embodiment 1:
a kind of resistance to deformation gage beam using in the calibration of wind-tunnel balance axon, comprise loading beam 2, laser reflection plate 4, gage beam body 3, described gage beam body comprises laser range finder 5, described loading beam 2 is connected with balance 1, described gage beam body root is connected with the beam arm root of described loading beam, the main body of gage beam 3 does not contact with the beam arm of loading beam 2, in semi-girder state, laser reflection plate is connected with described gage beam body tip, laser reflection plate 4 plate faces are installed straight down, laser range finder 5 is installed on fixed pedestal, Emission Lasers is to laser reflection plate 4.
embodiment 2:
the resistance to deformation gage beam using in the calibration of wind-tunnel balance axon described in embodiment 1, the direction that described laser reflection plate is larger with the beam arm distortion of described loading beam is vertical.In Fig. 1, the main deformation direction of the beam arm of loading beam 2 is downward.
embodiment 3:
the resistance to deformation gage beam using in the calibration of wind-tunnel balance axon described in embodiment 1 or 2, described loading beam is combined to form rood beam by girder, beam arm, and described girder is connected with balance model end by balance mount pad, balance coupling sleeve.
embodiment 4:
the resistance to deformation gage beam using in the calibration of wind-tunnel balance axon described in embodiment 1 or 2, is characterized in that: described gage beam body is connected with screw with beam arm root, and parallel with beam arm, but does not contact; Described laser reflection plate is arranged on the principal direction of beam arm distortion, as illustrated in accompanying drawing 1.
embodiment 5:
a kind of the above embodiments 1 or 2 or 3 or 4 resistance to deformation gage beams are in the application in the calibration of wind-tunnel balance axon, described gage beam body extends out after being connected with loading beam beam arm root, during the beam arm stress deformation of loading beam, ignore beam arm root self-deformation, distortion is the displacement being caused by balance distortion, now resistance to deformation gage beam is in free state, be not subject to loading beam deformation effect, by the laser reflection plate of gage beam end, realize Measurement accuracy and the accurate reset to balance to balance distortion.
embodiment 6:
resistance to deformation gage beam mainly forms 5 by loading beam 2, gage beam body 3, laser reflection plate 4, laser range finder, loading beam 2 is connected with balance 1, gage beam 3 roots are connected with the beam arm root of loading beam 2, the main body of gage beam 3 does not contact with the beam arm of loading beam 2, in semi-girder state, laser reflection plate 4 is installed on gage beam 3 ends, in figure, the main deformation direction of the beam arm of loading beam 2 is downward, laser reflection plate 4 plate faces are installed straight down, laser range finder 5 is installed on fixed pedestal, and Emission Lasers is to laser reflection plate 4.
when loading beam 2 beam arm right-hand members are subject to down load, balance 1, loading beam 2 are out of shape simultaneously, and gage beam 3 is connected in the beam arm root of loading beam 2, distortion is herein basically identical with balance 1 distortion, the displacement of gage beam 3 so, reflect the distortion of balance 1, by laser range finder 5, can measure the displacement of gage beam 3, again by the stage body resetting means of the 10 tons of quiet school of large load platforms, gage beam 3 is reset to initial position, balance can be reset to stressed front position, guarantee the stressed accuracy of balance 1.If laser reflection plate 4 is directly placed on the beam arm of loading beam 2, can cause balance 1 to reset excessively, cause balance 1 stressed inaccurate, reduce balance accuracy, gage beam 3 well addresses this problem.Gage beam 3 is connected with the beam arm root of loading beam 2, the distortion of beam arm root place is basic identical with balance 1 distortion, the displacement that can assert gage beam 3 directly reflects the distortion of balance 1, laser reflection plate 4 and laser range finder 5 by gage beam 3 ends, can measure the displacement of gage beam 3, the resetting means by the 10 tons of quiet school of large load platforms, resets to initial position by gage beam 3, balance 1 can be reset to initial position, improve the precision of balance calibration.
embodiment 7:
resistance to deformation gage beam is mainly comprised of loading beam, gage beam, laser reflection plate, laser range finder, loading beam is combined to form rood beam by girder, beam arm, girder is connected with balance model end by balance mount pad, balance coupling sleeve, and gage beam is connected with screw with beam arm root, and parallel with beam arm, but do not contact, laser reflection plate is installed on beam arm end, vertical with required direction of measurement, be generally the larger direction of beam arm distortion, laser range finder is installed on fixed pedestal, and Emission Lasers is perpendicular to laser reflection plate.
resistance to deformation gage beam of the present invention, be connected with loading beam beam arm root, and extend out, and do not contact with the beam arm of loading beam, during the beam arm stress deformation of loading beam, beam arm root self-deformation can be ignored substantially, be mainly the displacement being caused by balance distortion, now resistance to deformation gage beam, in free state, is not subject to loading beam deformation effect, by the laser reflection plate of gage beam end, can realize Measurement accuracy and the accurate reset to balance to balance distortion.
Claims (5)
1. the resistance to deformation gage beam using in wind-tunnel balance axon calibration, comprise loading beam, laser reflection plate, gage beam body, it is characterized in that: described gage beam body comprises laser range finder, described loading beam is connected with balance, described gage beam body root is connected with the beam arm root of described loading beam, laser reflection plate is connected with described gage beam body tip, described laser range finder is arranged on immobilizing foundation, and the laser vertical of generating laser transmitting is in laser reflection plate.
2. the resistance to deformation gage beam using in the calibration of wind-tunnel balance axon according to claim 1, is characterized in that: the direction that described laser reflection plate is larger with the beam arm distortion of described loading beam is vertical.
3. the resistance to deformation gage beam using in wind-tunnel balance axon calibration according to claim 1 and 2, it is characterized in that: described loading beam is combined to form rood beam by girder, beam arm, described girder is connected with balance model end by balance mount pad, balance coupling sleeve.
4. according to the resistance to deformation gage beam using in the calibration of wind-tunnel balance axon described in claim 1 or 2 or 3, it is characterized in that: described gage beam body is connected with screw with beam arm root, and parallel with beam arm, but does not contact; Described laser reflection plate is arranged on the principal direction of beam arm distortion.
5. the resistance to deformation gage beam described in a claim 1 or 2 or 3 or 4 is in the application in the calibration of wind-tunnel balance axon, it is characterized in that: described gage beam body extends out after being connected with loading beam beam arm root, during the beam arm stress deformation of loading beam, ignore beam arm root self-deformation, distortion is the displacement being caused by balance distortion, now resistance to deformation gage beam is in free state, be not subject to loading beam deformation effect, by the laser reflection plate of gage beam end, realize Measurement accuracy and the accurate reset to balance to balance distortion.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104316288A (en) * | 2014-08-26 | 2015-01-28 | 中国直升机设计研究所 | Rotor wing pneumatic testing stand lift force and bending moment calibration apparatus for large-tonnage rotor wing balance |
| CN104384241A (en) * | 2014-10-17 | 2015-03-04 | 北京航天益森风洞工程技术有限公司 | Device for protecting flexible jet pipe profile from excessive deformation |
| CN105222982A (en) * | 2015-11-06 | 2016-01-06 | 中国航空工业集团公司沈阳空气动力研究所 | A kind of wide range high rigidity loading head for balance calibration system |
| CN106053009A (en) * | 2016-07-05 | 2016-10-26 | 中国空气动力研究与发展中心超高速空气动力研究所 | Piezoelectric balance calibration loading sleeve |
| CN107091726A (en) * | 2017-05-27 | 2017-08-25 | 中国空气动力研究与发展中心高速空气动力研究所 | A kind of device and method for improving balance measurement uncertainty |
| CN107132123A (en) * | 2017-07-06 | 2017-09-05 | 中国航空工业集团公司西安飞机设计研究所 | A kind of Strength Test System and Strength Testing Methods of aircraft adhering film structure |
| CN108760227A (en) * | 2018-05-17 | 2018-11-06 | 中国航空工业集团公司哈尔滨空气动力研究所 | A kind of wind-tunnel balance angular flexibility calibration correction device and method |
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| JPH0735640A (en) * | 1993-07-21 | 1995-02-07 | Mitsubishi Heavy Ind Ltd | Apparatus for detecting/testing right and left balance of controlling system for boundary layer |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104316288A (en) * | 2014-08-26 | 2015-01-28 | 中国直升机设计研究所 | Rotor wing pneumatic testing stand lift force and bending moment calibration apparatus for large-tonnage rotor wing balance |
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| CN104384241A (en) * | 2014-10-17 | 2015-03-04 | 北京航天益森风洞工程技术有限公司 | Device for protecting flexible jet pipe profile from excessive deformation |
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| CN105222982A (en) * | 2015-11-06 | 2016-01-06 | 中国航空工业集团公司沈阳空气动力研究所 | A kind of wide range high rigidity loading head for balance calibration system |
| CN105222982B (en) * | 2015-11-06 | 2017-12-15 | 中国航空工业集团公司沈阳空气动力研究所 | A kind of wide range high rigidity loading head for balance calibration system |
| CN106053009A (en) * | 2016-07-05 | 2016-10-26 | 中国空气动力研究与发展中心超高速空气动力研究所 | Piezoelectric balance calibration loading sleeve |
| CN106053009B (en) * | 2016-07-05 | 2018-04-10 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of piezoelectric balance calibrates loading sleeve |
| CN107091726A (en) * | 2017-05-27 | 2017-08-25 | 中国空气动力研究与发展中心高速空气动力研究所 | A kind of device and method for improving balance measurement uncertainty |
| CN107132123A (en) * | 2017-07-06 | 2017-09-05 | 中国航空工业集团公司西安飞机设计研究所 | A kind of Strength Test System and Strength Testing Methods of aircraft adhering film structure |
| CN108760227A (en) * | 2018-05-17 | 2018-11-06 | 中国航空工业集团公司哈尔滨空气动力研究所 | A kind of wind-tunnel balance angular flexibility calibration correction device and method |
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