CN111473945A - Six-component ring balance - Google Patents
Six-component ring balance Download PDFInfo
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- CN111473945A CN111473945A CN202010337115.5A CN202010337115A CN111473945A CN 111473945 A CN111473945 A CN 111473945A CN 202010337115 A CN202010337115 A CN 202010337115A CN 111473945 A CN111473945 A CN 111473945A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
- G01M9/062—Wind tunnel balances; Holding devices combined with measuring arrangements
Abstract
The invention discloses a six-component ring type balance which is of an integrated structure and comprises a balance fixing section, a balance measuring section and a balance cantilever connecting section, wherein the balance fixing section is used for fixing the balance, the balance measuring section is provided with six component measuring elements, the balance cantilever connecting section is used for connecting a force measuring model, the balance fixing section is arranged at one end of the balance measuring section, and the balance cantilever connecting section is arranged at the other end of the balance measuring section. The invention has unique structure, breaks through the limitation of the traditional rod type wind tunnel balance structure, effectively shortens the size of the balance measuring section, reduces the difference between the inner diameter and the outer diameter of the balance, reduces the requirement of the balance mounting space and can meet the requirements of more wind tunnel force measurement tests; the balance has relatively good rigidity, the force measurement in a vibration test environment is more advantageous, the resistance measurement has stronger anti-interference capability, the balance has high measurement accuracy, and the balance has very high engineering application value.
Description
Technical Field
The invention relates to the technical field of wind tunnel aerodynamic load force-measuring balances, in particular to a six-component ring type balance.
Background
The wind tunnel balance (balance for short) is a key measuring device in the wind tunnel force test, is used for measuring the size, direction and action point of aerodynamic load (force and moment) acted on a model, when the jet flow is involved, the propeller and the like need to be ventilated at the middle part or a force test of installing a rotating shaft is carried out, due to the limitation of model space, the balance can only adopt an annular structure, the traditional six-component annular balance is formed by transformation on the basis of a conventional wind tunnel balance, the six-component annular balance is generally formed by punching the middle part of the conventional balance, a multi-section series rod type structure is adopted, the length of the balance is larger, the needed space between the inner diameter and the outer diameter of the balance is more, the size of a middle hole is greatly limited, the balance is large in deformation in the test, the vibration is easy to occur, many tests can only change the original structure of the model or even can not.
Disclosure of Invention
The invention aims to solve the problems and provide a six-component ring balance, the length of a measuring section of the six-component ring balance designed by the invention is greatly reduced, the requirement on the space between the inner diameter and the outer diameter of the balance is reduced, the size limitation of a middle hole is small, the six-component ring balance has the same level of accuracy as a conventional six-component force measuring balance, particularly has stronger resistance to other component load interference, and can finish the accurate measurement of aerodynamic load in a wind tunnel test.
The invention realizes the purpose through the following technical scheme:
a six-component ring balance is of an integrated structure and comprises a balance fixing section, a balance measuring section and a balance cantilever connecting section, wherein the balance fixing section is used for fixing the balance, the balance measuring section is provided with six component measuring elements, and the balance cantilever connecting section is used for connecting a force measuring model; the balance is characterized in that the balance fixing section is arranged on one side of the balance measuring section, and the balance cantilever connecting section is arranged on the other side of the balance measuring section.
Further setting: the balance measuring section comprises a lateral force measuring element, a yawing moment measuring element, a rolling moment measuring element, a lifting force measuring element, a pitching moment measuring element and a resistance measuring element, wherein the lateral force measuring element, the yawing moment measuring element and the rolling moment measuring element are positioned on the same longitudinal section, the resistance measuring elements are mutually nested and separated through a curve groove, the lateral force measuring element, the yawing moment measuring element and the rolling moment measuring element are in vertical symmetry, and the lifting force measuring element and the pitching moment measuring element are in horizontal symmetry and are four rectangular beams.
Further setting: the resistance measuring element consists of four rectangular beams which are respectively positioned in the directions of +/-45 degrees and +/-135 degrees of the central axis, and the four rectangular beams are symmetrical at the periphery and respectively inclined +/-45 degrees with the horizontal plane.
Further setting: the curve groove is vertical to the horizontal plane of the balance, is vertically symmetrical and is formed by combining 3 linear grooves, the middle linear groove is parallel to the longitudinal section, the two linear grooves on the two sides and the middle linear groove form a certain angle and are bilaterally symmetrical, and the 3 linear grooves are in arc transition.
Further setting: the balance fixing section, the balance measuring section and the balance cantilever connecting section are made of a whole block of alloy steel material and are of an integral structure.
Further setting: resistance strain gauges are symmetrically adhered to the front side surface and the rear side surface of four rectangular beams of the resistance measuring element, 4 strain gauges are adhered to each rectangular beam and are respectively positioned in the middle positions of the upper end and the lower end of the front side surface and the rear side surface, the directions of the strain gauges are parallel to the long edges of the rectangular beams, the top ends of the strain gauges are overlapped with the radius edges of the root parts of the rectangular beams, and a resistance measuring Wheatstone bridge is formed by 16 resistance strain gauges; resistance strain gauges are pasted on the side faces of 8 column beams of the yaw moment and roll moment measuring element and the lift force and pitching moment measuring element respectively to form a Wheatstone bridge for measuring the lift force, the lateral force, the yaw moment, the pitching moment and the roll moment.
Further setting: the balance fixing section is fixedly connected with the supporting device in a flange connection or column connection mode.
Further setting: a key groove is formed in the outer side of the balance cantilever connecting section, and the balance cantilever connecting section is connected with the force measuring model in a conical surface connection or column connection mode; when the conical surface connection is adopted, the front end of the balance cantilever connecting section is provided with threads for conical surface disassembly and assembly.
Further setting: the balance fixing section, the balance measuring section and the balance cantilever connecting section are of an axial structure in overall appearance, and a middle hole penetrates through the whole.
The six-component ring balance is characterized in that: the balance comprises a six-component ring type balance, wherein a support rod is arranged on one side of a balance fixing section of the six-component ring type balance, the six-component ring type balance is connected with the support rod in a key positioning and cylindrical connection mode and locked by a cylindrical pin and a screw, an air duct is arranged on the inner side of the support rod and can be in contact with the balance fixing section, and a circumferential gap is reserved between the air duct and a balance measuring section as well as a balance cantilever connecting section; a force measuring model is installed at one end of a balance cantilever connecting section of the six-component ring type balance, and the six-component ring type balance is connected with the force measuring model in a key positioning and conical connecting mode and is pressed tightly through a fastening piece; the six-component ring type balance is characterized in that a balance protective sleeve is arranged on the outer side of the six-component ring type balance, the balance protective sleeve is in contact with the balance fixing section, and a gap is reserved between the balance protective sleeve and the balance measuring section and between the balance protective sleeve and the balance cantilever connecting section.
Further setting: the balance protective sleeve is connected to the six-component ring balance through threads.
Compared with the prior art, the invention has the following beneficial effects:
the balance has a unique structure, the limitation of the traditional rod type wind tunnel balance structure is broken through, the size of a balance measuring section is effectively shortened, the difference between the inner diameter and the outer diameter of the balance is reduced, the requirement on the installation space of the balance is lowered, and the requirements of more wind tunnel force measurement tests can be met; the balance has relatively good rigidity, the force measurement in a vibration test environment is more advantageous, the resistance measurement has stronger anti-interference capability, the balance has high measurement accuracy, the defects of the traditional ring balance can be effectively overcome, and the application value is very high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a front view of a six component ring balance according to the present invention;
FIG. 2 is a top view of a six component ring balance according to the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is a cross-sectional view B-B of FIG. 2;
FIG. 5 is a cross-sectional view C-C of FIG. 2;
FIG. 6 is a cross-sectional view D-D of FIG. 2;
FIG. 7 is a schematic view of an assembly structure of a six-component ring balance according to the present invention;
FIG. 8 is a structural diagram of the sticking positions of strain gauges of a six-component ring-type balance resistance measuring element according to the present invention (the numbers in parentheses represent the numbers of the strain gauges stuck at the same positions on the other side);
FIG. 9 is a schematic diagram of a six-component ring balance resistance Wheatstone bridge bridging method according to the invention.
The reference numerals are explained below:
1. a balance fixing section; 2. a balance measuring section; 3. a balance cantilever connecting section; 4. a curved groove; 5. lateral force, yaw moment and roll moment measuring elements; 6. lift and pitching moment measuring elements; 7. a resistance measuring element; 8. a strut; 9. an air duct; 10. a balance protective sleeve; 11. a force measurement model; 12. a fastener; 13. a six-component ring balance.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The invention will be further described with reference to the accompanying drawings in which:
as shown in fig. 1, 2, 3, 4, 5, 6, 8, and 9, a six-component ring balance is an integrated structure, and includes a balance fixing section 1 for fixing the balance, a balance measuring section 2 provided with six component measuring elements, and a balance cantilever connecting section 3 for connecting a force-measuring model; a balance fixing section 1 is arranged on one side of the balance measuring section 2, and a balance cantilever connecting section 3 is arranged on the other side of the balance measuring section 2.
Further setting: the balance measuring section 2 comprises a side force, yaw moment and roll moment measuring element 5, a lift force and pitch moment measuring element 6 and a resistance measuring element 7, wherein the side force, yaw moment and roll moment measuring element 5 and the lift force and pitch moment measuring element 6 are positioned on the same longitudinal section, are nested with the resistance measuring element 7 and are separated by a curved groove 4, the side force, yaw moment and roll moment measuring element 5 are vertically symmetrical, and the lift force and pitch moment measuring element 6 are horizontally symmetrical and are all four rectangular beams; the resistance measuring element 7 consists of four rectangular beams which are respectively positioned in the directions of +/-45 degrees and +/-135 degrees of a central shaft, the four rectangular beams are symmetrical at the periphery and respectively inclined +/-45 degrees with the horizontal plane; the curve groove 4 is vertical to the horizontal plane of the balance, is vertically symmetrical and is formed by combining 3 linear grooves, the middle linear groove is parallel to the longitudinal section, two linear grooves on two sides and the middle linear groove form a certain angle and are bilaterally symmetrical, and the 3 linear grooves are in arc transition; the balance fixing section 1, the balance measuring section 2 and the balance cantilever connecting section 3 are made of a whole block of alloy steel material and are of an integral structure; resistance strain gauges are symmetrically adhered to the front side surface and the rear side surface of four rectangular beams of the resistance measuring element 7, 4 strain gauges are adhered to each rectangular beam and are respectively positioned in the middle positions of the upper end and the lower end of the front side surface and the rear side surface, the directions of the strain gauges are parallel to the long edges of the rectangular beams, the top ends of the strain gauges are overlapped with the radius edges of the root parts of the rectangular beams, and a resistance measuring Wheatstone bridge is formed by 16 resistance strain gauges; resistance strain gauges are pasted on the side surfaces of 8 column beams of the yaw moment and roll moment measuring element 5 and the lift force and pitching moment measuring element 6 to respectively form a Wheatstone bridge for measuring lift force, lateral force, yaw moment, pitching moment and roll moment; a key groove is formed in the inner side of the balance fixing section 1, and the balance fixing section 1 is fixedly connected with the supporting device in a flange connection or column connection mode; a key groove is formed in the outer side of the balance cantilever connecting section 3, and the balance cantilever connecting section 3 is connected with the force measuring model in a conical surface connection or column connection mode; when the conical surface connection is adopted, the front end of the balance cantilever connecting section 3 is provided with threads for conical surface disassembly and assembly; the balance fixing section 1, the balance measuring section 2 and the balance cantilever connecting section 3 are of an axial structure in overall appearance, and a middle hole penetrates through the whole.
As shown in fig. 7, an applied six-component ring balance includes a six-component ring balance 13, a support rod 8 is installed at one side of a balance fixing section 1 of the six-component ring balance 13, the six-component ring balance 13 is connected with the support rod 8 through key positioning and cylindrical connection modes, and is locked through a cylindrical pin and a screw, an air duct 9 is arranged at the inner side of the support rod 8, the air duct 9 can be in contact with the balance fixing section 1, and a circumferential gap is reserved between the air duct 9 and a balance measuring section 2 and a balance cantilever connecting section 3; one end of a balance cantilever connecting section 3 of a six-component ring balance 13 is provided with a force measuring model 11, and the six-component ring balance 13 is connected with the force measuring model 11 in a key positioning and conical connection mode and is pressed tightly by a fastener 12; a balance protective sleeve 10 is arranged on the outer side of the six-component ring type balance 13, the balance protective sleeve 10 is in contact with the balance fixing section 1, and a gap exists between the balance protective sleeve 10 and the balance measuring section 2 and between the balance cantilever connecting sections 3.
Further setting: balance cover 10 is threaded to a six-component ring balance 13.
In a typical application case of the six-component ring balance, the design load of the balance is as follows: 2000N of lift force, 2000N of lateral force, 3000N of resistance, 300 N.m of pitching moment, 200 N.m of yawing moment and 50 N.m of rolling moment, and the length of the balance measuring section 2 is 68mm, the diameter phi of an inner hole is 108mm, and the outer diameter phi is 144 mm. If a traditional ring balance structure is used, the length of the measuring section 2 of the balance is not less than 100mm, and the diameter of an inner hole is not more than phi 80 mm.
Working principle and working process of the invention
The six-component ring balance is a strain wind tunnel balance and is used for measuring each component aerodynamic force borne by a force measurement model 11, in a wind tunnel test, the aerodynamic force acting on the force measurement model 11 is transmitted to a balance measurement section 2 through a balance cantilever connecting section 3, so that a lateral force, yaw moment and roll moment measurement element 5, a lift force and pitch moment measurement element 6 and a resistance measurement element 7 are deformed, a Wheatstone bridge stuck on the surface loses the original balance to generate a voltage signal increment, and the aerodynamic force measurement is completed through the corresponding relation between the output voltage of the bridge and the borne load;
the four resistance measuring beams are inclined at +/-45 degrees and are completely symmetrical relative to the longitudinal axis and the transverse axis, so that the four resistance measuring beams have better capacity of resisting other load interference, when the four resistance measuring beams bear resistance, the deformation of the four resistance measuring beams is vertically symmetrical, and when the four resistance measuring beams bear lift force, lateral force, pitching moment and yawing moment, the deformation of the four resistance measuring beams is either vertically antisymmetric or horizontally antisymmetric, can be balanced through a Wheatstone bridge, does not generate output, and when the four resistance measuring beams bear rolling moment, does not generate output due to high rigidity in the rolling direction.
The four resistance measuring beams of the six-component ring balance 13 are staggered with the combined measuring elements for measuring the lift force, the lateral force, the pitching moment, the yawing moment and the rolling moment, can be embedded with each other, and are balanced in rigidity through the curved groove 4, so that the length of the balance measuring section 2 is effectively shortened;
the six-component ring balance 13 is shorter in length, so that on one hand, a cantilever is shorter in force measurement, better in rigidity and small in generated deformation, and model installation and test force measurement are facilitated; on the other hand, the center of the balance is close to the pressure center of the force measuring model 11, the generated aerodynamic loads are relatively matched, the balance output is more balanced, and the precision is better;
the connection and measurement elements of the six-component ring balance 13 can be located in a narrow circular space, the required model installation space is small, the center hole can be large, so that the middle ventilation or the installation of the rotating shaft is easier, the test capability is enhanced, and the balance protective sleeve 10 plays a role in protecting the balance and isolating the influence of cross flow.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (11)
1. A six-component ring balance characterized by: the six-component ring balance is of an integrated structure and comprises a balance fixing section (1) for fixing the balance, a balance measuring section (2) provided with six component measuring elements and a balance cantilever connecting section (3) for connecting a force measuring model; the balance is characterized in that one side of the balance measuring section (2) is provided with the balance fixing section (1), and the other side of the balance measuring section (2) is provided with the balance cantilever connecting section (3).
2. A six-component ring balance according to claim 1 wherein: balance measurement section (2) are including side power, driftage moment and roll moment measuring element (5), lift and pitch moment measuring element (6), resistance measuring element (7), side power, driftage moment and roll moment measuring element (5) lift and pitch moment measuring element (6) are in same longitudinal section, with resistance measuring element (7) have carried out the nestification each other, separate through curve groove (4), side power, driftage moment and roll moment measuring element (5) longitudinal symmetry, lift and pitch moment measuring element (6) bilateral symmetry, and be four rectangular beam.
3. A six-component ring balance according to claim 2 wherein: the resistance measuring element (7) is composed of four rectangular beams which are respectively positioned in the directions of +/-45 degrees and +/-135 degrees of the central axis, and the four rectangular beams are symmetrical around and respectively inclined +/-45 degrees with the horizontal plane.
4. A six-component ring balance according to claim 2 wherein: the curve grooves (4) are vertical to the horizontal plane of the balance, are vertically symmetrical and are formed by combining 3 linear grooves, the middle linear groove is parallel to the longitudinal section, the two linear grooves on the two sides and the middle linear groove form a certain angle and are bilaterally symmetrical, and the 3 linear grooves are in arc transition.
5. A six-component ring balance according to claim 1 wherein: the balance fixing section (1), the balance measuring section (2) and the balance cantilever connecting section (3) are made of a whole block of alloy steel material and are of an integrated structure.
6. A six-component ring balance according to claim 2 wherein: resistance strain gauges are symmetrically adhered to the front side surface and the rear side surface of four rectangular beams of the resistance measuring element (7), 4 strain gauges are adhered to each rectangular beam and are respectively positioned in the middle positions of the upper end and the lower end of the front side surface and the rear side surface, the directions of the strain gauges are parallel to the long sides of the rectangular beams, the top ends of the strain gauges are overlapped with the radius edges of the roots of the rectangular beams, and a resistance measuring Wheatstone bridge is formed by 16 resistance strain gauges; and resistance strain gauges are adhered to the side surfaces of 8 column beams of the yaw moment and roll moment measuring element (5) and the lift force and pitch moment measuring element (6) to respectively form a Wheatstone bridge for measuring lift force, lateral force, yaw moment, pitch moment and roll moment.
7. A six-component ring balance according to claim 1 wherein: the balance fixing section (1) is provided with a key groove on the inner side, and the balance fixing section (1) is fixedly connected with the supporting device in a flange connection or column connection mode.
8. A six-component ring balance according to claim 1 wherein: a key groove is formed in the outer side of the balance cantilever connecting section (3), and the balance cantilever connecting section (3) is connected with the force measuring model in a conical surface connection or column connection mode; when the conical surface connection is adopted, the front end of the balance cantilever connecting section (3) is provided with threads for conical surface disassembly and assembly.
9. A six-component ring balance according to claim 1 wherein: the balance fixing section (1), the balance measuring section (2) and the balance cantilever connecting section (3) are of an axial structure in overall appearance, and a middle hole penetrates through the whole.
10. The six-component ring balance is characterized in that: the device comprises a six-component ring balance (13), wherein a supporting rod (8) is installed on one side of a balance fixing section (1) of the six-component ring balance (13), the six-component ring balance (13) is connected with the supporting rod (8) in a key positioning and cylinder connecting mode and locked by a cylindrical pin and a screw, an air duct (9) is arranged on the inner side of the supporting rod (8), the air duct (9) can be in contact with the balance fixing section (1), and a circumferential gap is reserved between the air duct (9) and a balance measuring section (2) and between the air duct (9) and a balance cantilever connecting section (3); one end of a balance cantilever connecting section (3) of the six-component ring balance (13) is provided with a force measuring model (11), and the six-component ring balance (13) is connected with the force measuring model (11) in a key positioning and conical connection mode and is pressed tightly through a fastener (12); the six-component ring type balance (13) is provided with a balance protective sleeve (10) on the outer side, the balance protective sleeve (10) is in contact with the balance fixing section (1), and a gap is reserved between the balance protective sleeve (10) and the balance measuring section (2) and between the balance cantilever connecting sections (3).
11. A six-component ring balance according to claim 10 wherein: the balance protective sleeve (10) is connected to the six-component ring balance (13) through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010337115.5A CN111473945A (en) | 2020-04-26 | 2020-04-26 | Six-component ring balance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010337115.5A CN111473945A (en) | 2020-04-26 | 2020-04-26 | Six-component ring balance |
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| CN111473945A true CN111473945A (en) | 2020-07-31 |
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| CN202010337115.5A Pending CN111473945A (en) | 2020-04-26 | 2020-04-26 | Six-component ring balance |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112345198A (en) * | 2020-10-29 | 2021-02-09 | 中国航天空气动力技术研究院 | Six-component rod type strain balance for aircraft landing gear force measurement test |
| CN112504619A (en) * | 2020-11-25 | 2021-03-16 | 西南科技大学 | Balance S/N phase-locked amplification detection system and method of six-component balance bridge |
| CN112781826A (en) * | 2020-12-24 | 2021-05-11 | 中国航空工业集团公司西安飞机设计研究所 | Integrated design method for force measuring balance of lifting surface component |
| CN114235321A (en) * | 2022-02-25 | 2022-03-25 | 中国空气动力研究与发展中心高速空气动力研究所 | Wind tunnel force measurement experimental device integrating gas rudder and spray pipe |
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2020
- 2020-04-26 CN CN202010337115.5A patent/CN111473945A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112345198A (en) * | 2020-10-29 | 2021-02-09 | 中国航天空气动力技术研究院 | Six-component rod type strain balance for aircraft landing gear force measurement test |
| CN112345198B (en) * | 2020-10-29 | 2022-03-04 | 中国航天空气动力技术研究院 | Six-component rod type strain balance for aircraft landing gear force measurement test |
| CN112504619A (en) * | 2020-11-25 | 2021-03-16 | 西南科技大学 | Balance S/N phase-locked amplification detection system and method of six-component balance bridge |
| CN112504619B (en) * | 2020-11-25 | 2022-05-06 | 西南科技大学 | Balance S/N phase-locked amplification detection system and method of six-component balance bridge |
| CN112781826A (en) * | 2020-12-24 | 2021-05-11 | 中国航空工业集团公司西安飞机设计研究所 | Integrated design method for force measuring balance of lifting surface component |
| CN112781826B (en) * | 2020-12-24 | 2023-06-23 | 中国航空工业集团公司西安飞机设计研究所 | Integrated design method for lifting surface part force measurement balance |
| CN114235321A (en) * | 2022-02-25 | 2022-03-25 | 中国空气动力研究与发展中心高速空气动力研究所 | Wind tunnel force measurement experimental device integrating gas rudder and spray pipe |
| CN114235321B (en) * | 2022-02-25 | 2022-04-26 | 中国空气动力研究与发展中心高速空气动力研究所 | Wind tunnel force measurement experimental device integrating gas rudder and spray pipe |
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