Rod type six-component high-precision trace rolling moment wind tunnel balance and measuring method

Abstract

The invention discloses a rod type six-component high-precision trace rolling moment wind tunnel balance and a measurement method, and belongs to the technical field of aerospace force measurement test power measurement. According to the invention, the problems of large processing difficulty, long processing period and incapability of meeting aviation tests in research and development of micro rolling moment balances at present are solved. A longitudinal column beam, a transverse column beam and a roll-on *-shaped beam are connected between a front cone and a combined element and between a rear cone and the combined element respectively, a resistance beam is arranged on the combined element, the thickness range of sheet beams of a multi-sheet structure of the longitudinal column beam is 0.5 mm-0. 8mm, the gap range of the sheet beams is 0.5 mm-1mm, the thickness range of sheet beams of a multi-sheet structure of the transverse column beam is 0.5 mm-0. 8mm, and the gap range of the sheet beams is 0.5 mm-1mm. According to the rod type six-component high-precision trace rolling moment wind tunnel balance and the measurement method, rolling output is effectively increased, and matching output of small rolling moment and loads in other directions is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of dynamic measurement of aerospace force measurement tests, and specifically relates to a rod-type six-component high-precision micro-rolling moment wind tunnel balance and a measurement method. Background Art

[0002] The rod-type six-component balance used in wind tunnel force measurement tests can directly measure the aerodynamic force and torque acting on the aviation model, and is one of the most critical high-precision sensors in force measurement wind tunnel tests. For certain types of aircraft tests, such as tactical missile model wind tunnel tests, the measurement of micro-rolling torque caused by the appearance of asymmetric vortices at large angles of attack, and the measurement of micro-rolling torque of small asymmetric warheads and ablated shapes, there is a situation where the model rolling torque is too small and does not match other loads.

[0003] At present, although there have been preliminary theoretical results in the research and development of micro-roll moment balances, these solutions are difficult to process and have long processing cycles, and cannot meet the urgent needs of aviation testing. The specific technical disadvantages are mainly as follows: Patent publication number CN114323546B discloses a high-sensitivity rod-type six-component wind tunnel test balance inlaid with different materials. The patent uses different materials to improve the sensitivity of the balance rolling element, but has the following disadvantages: 1) The processing requirements are extremely high, and the geometric tolerance deviation of the assembly surface has an adverse effect on the measurement of the balance; 2) The sensitivity improvement effect is limited, and the use of materials such as 7075 described in the patent reduces the strength of the balance.

[0004] Patent publication number CN112525481A discloses a six-component high-precision micro-rolling torque measurement device and measurement method. The patent mainly uses an air bearing method, but the complexity of the key component air bearing structure and its own characteristics are difficult to implement, and the space of the high-speed test model is limited, making it basically difficult to implement the air bearing solution.

[0005] Therefore, the present application proposes a rod-type six-component high-precision micro-rolling moment wind tunnel and a measurement method to solve the above-mentioned problems. Summary of the invention

[0006] The purpose of the present invention is to solve the problems that the current research and development of micro-roll moment balances is difficult to process, has a long processing cycle, and cannot meet the requirements of aviation tests. A brief overview of the present invention is given below to provide a basic understanding of certain aspects of the present invention. It should be understood that this overview is not an exhaustive overview of the present invention. It is not intended to identify the key or important parts of the present invention, nor is it intended to limit the scope of the present invention.

[0007] The technical solution of the present invention: Scheme 1: A rod-type six-component high-precision micro-rolling moment wind tunnel balance, comprising a front cone, a rear cone and a combined element, wherein the front cone and the rear cone are arranged on both sides of the combined element respectively, and a longitudinal column beam, a transverse column beam and a rolling cross beam are connected between the front cone and the combined element respectively, and a longitudinal column beam, a transverse column beam and a rolling cross beam are connected between the rear cone and the combined element. A resistance beam is arranged on the combined element, and resistance support beams are arranged on both sides of the resistance beam. The longitudinal column beam adopts a multi-piece structure and is arranged longitudinally, and the thickness of each beam of the multi-piece structure ranges from 0.5mm to 0.8mm, and the gap between the beams ranges from 0.5mm to 1mm. The transverse column beam adopts a multi-piece structure and is arranged transversely, and the thickness of each beam of the multi-piece structure ranges from 0.5mm to 0.8mm, and the gap between the beams ranges from 0.5mm to 1mm.

[0008] Furthermore, the longitudinal column beams include a front upper longitudinal column beam, a front lower longitudinal column beam, a rear upper longitudinal column beam and a rear lower longitudinal column beam, the front upper longitudinal column beam and the front lower longitudinal column beam are arranged between the front cone and the combined element, and the rear upper longitudinal column beam and the rear lower longitudinal column beam are arranged between the rear cone and the combined element.

[0009] Furthermore, the transverse column beam includes a left front transverse column beam, a right front transverse column beam, a left rear transverse column beam and a right rear transverse column beam, the left front transverse column beam and the right front transverse column beam are arranged between the front cone and the combination element, and the left rear transverse column beam and the right rear transverse column beam are arranged between the rear cone and the combination element.

[0010] Furthermore, both sides of the rolling cross beam are provided with thin sheets, and the thickness of the thin sheets is in the range of 0.5mm to 0.8mm.

[0011] Furthermore, a plurality of first strain gauges are attached to the longitudinal column beam, a plurality of second strain gauges are attached to the resistance beam, a plurality of third strain gauges are attached to the transverse column beam, and a plurality of fourth strain gauges are attached to the rolling cross beam.

[0012] Solution 2: A rod-type six-component high-precision micro-rolling moment wind tunnel balance measurement method, which is based on the rod-type six-component high-precision micro-rolling moment wind tunnel balance described in Solution 1 and includes the following steps: Step 1: Paste four first strain gauges on the upper and lower end surfaces of the front upper longitudinal column beam and the front lower longitudinal column beam to form a Wheatstone bridge, which is defined as U1; Step 2: Paste four second strain gauges on the upper and lower end surfaces of the rear upper longitudinal column beam and the rear lower longitudinal main beam to form a Wheatstone bridge, which is defined as U2; Step 3: Paste four third strain gauges on the left and right end surfaces between the left front transverse main beam and the right front transverse column beam to form a Wheatstone bridge, which is defined as U3; Step 4: Paste four third strain gauges on the left and right end surfaces between the left rear transverse column beam and the right rear transverse main beam to form a Wheatstone bridge, which is defined as U4; Step 5: Paste 8 fourth strain gauges on the rolling crossbeam to form a Wheatstone bridge, which is located at U5; Step 6: Paste a total of 4 second strain gauges on the resistance beam to form a Wheatstone bridge, which is located at U6; Step 7: Calibrate the balance. The six-element load on the balance is determined by the following formula: ; ; ; ; ; ; Among them, Y is the balance lift, Mz is the balance pitch moment, Z is the balance side force, My is the balance yaw moment, Mx is the balance roll moment, and X is the balance drag.

[0013] The present invention has the following beneficial effects: 1. The rod-type six-component high-precision micro-rolling moment wind tunnel balance of the present invention effectively increases the rolling output and realizes the matching output of small rolling moment and loads in other directions by processing the multi-piece structure of the longitudinal longitudinal beam and the transverse longitudinal beam to ensure that the longitudinal and transverse stiffness remain basically unchanged. Compared with the existing technical solutions, the balance size will not change significantly, and the design of the force measurement model is easy to realize. The balance does not use additional assembly, welding and other processes, and will not generate additional interference stress; 2. A rod-type six-component high-precision micro-rolling moment wind tunnel balance of the present invention processes a thin plate on the rolling crossbeam for measuring the rolling moment, which can reduce the influence of loads in other directions on the rolling moment measurement and improve the accuracy of the rolling moment.

[0014] 3. The measuring method of the rod-type six-component high-precision micro-rolling moment wind tunnel balance of the present invention can realize the accurate measurement of the micro-rolling moment, and effectively solve the influence of loads in other directions on the measurement of the micro-rolling moment, avoiding the problem of high processing difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a main view of a rod-type six-component high-precision micro-roll moment wind tunnel balance; Figure 2 It is a top view of a rod-type six-component high-precision micro-roll moment wind tunnel balance; Figure 3 yes Figure 1 Sectional view of AA in the middle; Figure 4 It is a partial schematic diagram of the longitudinal column beam; Figure 5 It is a partial schematic diagram of the transverse column beam; Figure 6 A partial schematic diagram of a rolling M-beam; Figure 7 It is a schematic diagram of the longitudinal column beam and resistance beam and the strain gauge; Figure 8 is a schematic diagram of the transverse column beam and strain gauge; Fig. 9 It is a schematic diagram of the rolling PZ beam and the strain gauge; Fig.10 It is a longitudinal column and beam Wheatstone bridge road diagram; Fig.11 It is a transverse column and beam Wheatstone bridge road diagram; Fig.12 It is the rolling crossbeam Wheatstone Bridge road map; Fig.13 It is a resistance beam Wheatstone bridge diagram.

[0016] In the figure: 1-longitudinal column beam, 2-transverse column beam, 3-eliminating thin plate, 4-rolling M-beam, 5-resistance support beam, 6-resistance beam, 7-front cone, 8-rear cone, 9-combined element, 11-front upper longitudinal column beam, 12-front lower longitudinal column beam, 13-rear upper longitudinal column beam, 14-rear lower longitudinal column beam, 21-left front transverse column beam, 22-right front transverse column beam, 23-left rear transverse column beam, 24-right rear transverse column beam, 31-first strain gauge, 32-second strain gauge, 33-third strain gauge, 34-fourth strain gauge. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0018] The connection mentioned in the present invention is divided into fixed connection and detachable connection. The fixed connection (i.e., non-detachable connection) includes but is not limited to conventional fixed connection methods such as folding connection, rivet connection, bonding connection and welding connection. The detachable connection includes but is not limited to conventional detachable methods such as threaded connection, snap connection, pin connection and hinge connection. When the specific connection method is not clearly defined, it is assumed that at least one connection method can always be found in the existing connection methods to achieve the function. Those skilled in the art can choose according to their needs. For example: welding connection is selected for fixed connection, and hinge connection is selected for detachable connection.

[0019] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] Embodiment 1, combination Figure 1-Figure 9 The present embodiment is described. A rod-type six-component high-precision micro-rolling moment wind tunnel balance of the present embodiment comprises a front cone 7, a rear cone 8 and a combination element 9. The front cone 7 and the rear cone 8 are arranged on both sides of the combination element 9 respectively. A longitudinal column beam 1, a transverse column beam 2 and a rolling cross beam 4 are connected between the front cone 7 and the combination element 9 respectively. A longitudinal column beam 1, a transverse column beam 2 and a rolling cross beam 4 are connected between the rear cone 8 and the combination element 9. A resistance beam 6 is arranged on the combination element 9. Resistance support beams 5 are arranged on both sides of the resistance beam 6. The longitudinal column beam 1 is arranged longitudinally with a multi-piece structure. The thickness of each beam of the multi-piece structure is in the range of 0.5mm~0.8mm, and the gap between the beams is in the range of 0.5mm~1mm. The transverse column beam 2 is arranged transversely with a multi-piece structure. The thickness of each beam of the multi-piece structure is in the range of 0.5mm~0.8mm, and the gap between the beams is in the range of 0.5mm~1mm. Four second strain gauges 32 are pasted on the resistance beam 6 to form a Wheatstone bridge.

[0021] The longitudinal main beam 1 is arranged on the upper and lower sides of the axis, symmetrically arranged along the horizontal plane, and divided into two left and right parts, which plays the role of measuring the longitudinal load, that is, the lift and pitch moment. There are a total of 4 longitudinal column beams 1. The front upper longitudinal column beam 11 and the front lower longitudinal column beam 12 are arranged between the front cone 7 and the combined element 9, and the rear upper longitudinal column beam 13 and the rear lower longitudinal column beam 14 are arranged between the rear cone 8 and the combined element 9. The front and rear ends of the longitudinal main beam 1 are designed as a multi-piece structure, and the multi-piece structure is arranged longitudinally. The thickness of each beam of the multi-piece structure is 0.5mm~0.8mm, and the gap is 0.5mm~1mm. The number of multi-piece structures is determined according to the load. Four first strain gauges 31 are respectively pasted on the front upper longitudinal column beam 11 and the front lower longitudinal column beam 12 to form a Wheatstone bridge. Four first strain gauges 31 are also respectively pasted on the rear upper longitudinal column beam 13 and the rear lower longitudinal column beam 14 to form a Wheatstone bridge.

[0022] The transverse column beam 2 is arranged on the left and right sides of the axis, symmetrically arranged along the vertical plane, and divided into two parts, which play the role of measuring the lateral load, that is, the lateral force and the yaw moment. There are a total of 4 transverse column beams 2. The left front transverse column beam 21 and the right front transverse column beam 22 are arranged between the front cone 7 and the combined element 9, and the left rear transverse column beam 23 and the right rear transverse column beam 24 are arranged between the rear cone 7 and the combined element 9. The front and rear ends of the transverse column beam 2 are designed with a multi-piece structure, which is arranged horizontally. The thickness of each beam of the multi-piece structure is 0.5mm~0.8mm, and the gap is 0.5mm~1mm. The number of multi-piece structures is determined according to the load. Four third strain gauges 33 are respectively pasted on the left front transverse column beam 21 and the right front transverse column beam 22, and four third strain gauges 33 are also pasted on the left rear transverse column beam 23 and the right rear transverse column beam 24, forming a Wheatstone bridge.

[0023] There are four rolling crossbeams 4, which are arranged rotationally symmetrically along the central axis. The thickness is determined according to the load, and the length is greater than the length of the longitudinal column beam 1 and the transverse column beam 2, which plays a role in measuring the rolling moment. At the same time, the elimination sheet 3 is arranged on both sides of the rolling crossbeam 4. The thickness of the elimination sheet 3 is between 0.5mm and 0.8mm. The length of the elimination sheet 3 is determined according to the design space of the balance size, which plays a role in eliminating the interference of the load in other directions on the rolling crossbeam 4. Eight fourth strain gauges 34 are pasted on the end face of the rolling crossbeam 4 on the rear side to form a Wheatstone bridge.

[0024] Embodiment 1, combination Figure 1-Figure 13 This embodiment is described. A rod-type six-component high-precision micro-rolling moment wind tunnel balance measurement method of this embodiment includes the following steps: Step 1: Paste four first strain gauges 31 on the upper and lower end surfaces of the front upper longitudinal column beam 11 and the front lower longitudinal column beam 12 to form a Wheatstone bridge, which is defined as U1; Step 2: Paste four second strain gauges 32 on the middle upper and lower end surfaces of the rear upper longitudinal column beam 13 and the rear lower longitudinal main beam 14 to form a Wheatstone bridge, which is defined as U2; Step 3: Paste four third strain gauges 33 on the left and right end surfaces between the left front transverse main beam 21 and the right front transverse column beam 22 to form a Wheatstone bridge, which is defined as U3; Step 4: Paste four third strain gauges 33 on the left and right end surfaces between the left rear transverse column beam 23 and the right rear transverse main beam 24 to form a Wheatstone bridge, which is defined as U4; Step 5: Paste eight fourth strain gauges 34 on the rolling crossbeam 4 to form a Wheatstone bridge, and the bridge is positioned as U5; Step 6: A total of four second strain gauges 32 are pasted on the resistance beam 6 to form a Wheatstone bridge, and the bridge is positioned as U6; Step 7: Calibrate the balance. The six-element load on the balance is determined by the following formula: ; ; ; ; ; ; Among them, Y is the balance lift, Mz is the balance pitch moment, Z is the balance side force, My is the balance yaw moment, Mx is the balance roll moment, and X is the balance drag.

[0025] It should be noted that the attached Figure 10~Figure 13 R1~R28 on each Wheatstone bridge are all resistors on the Wheatstone bridge.

[0026] This embodiment is only an exemplary description of the present invention and does not limit its protection scope. Those skilled in the art may also make partial changes thereto. As long as they do not exceed the spirit of the present invention, they are within the protection scope of the present invention.

Claims

1. A rod-type six-component high-precision micro-roll moment wind tunnel balance, characterized in that: The invention comprises a front cone (7), a rear cone (8) and a combined element (9), wherein the front cone (7) and the rear cone (8) are arranged on both sides of the combined element (9), respectively; a longitudinal column beam (1), a transverse column beam (2) and a rolling cross beam (4) are connected between the front cone (7) and the combined element (9); a longitudinal column beam (1), a transverse column beam (2) and a rolling cross beam (4) are connected between the rear cone (8) and the combined element (9); a resistance beam (6) is arranged on the combined element (9), and resistance support beams (5) are arranged on both sides of the resistance beam (6); the longitudinal column beam (1) adopts a multi-piece structure for longitudinal arrangement, wherein each beam of the multi-piece structure has a thickness ranging from 0.5 mm to 0.8 mm, and a beam gap ranging from 0.5 mm to 1 mm; the transverse column beam (2) adopts a multi-piece structure for transverse arrangement, wherein each beam of the multi-piece structure has a thickness ranging from 0.5 mm to 0.8 mm, and a beam gap ranging from 0.5 mm to 1 mm.

2. A rod-type six-component high-precision micro-roll moment wind tunnel balance according to claim 1, characterized in that: The longitudinal column beam (1) comprises a front upper longitudinal column beam (11), a front lower longitudinal column beam (12), a rear upper longitudinal column beam (13) and a rear lower longitudinal column beam (14); the front upper longitudinal column beam (11) and the front lower longitudinal column beam (12) are arranged between the front cone (7) and the combined element (9), and the rear upper longitudinal column beam (13) and the rear lower longitudinal column beam (14) are arranged between the rear cone (8) and the combined element (9).

3. A rod-type six-component high-precision micro-roll moment wind tunnel balance according to claim 2, characterized in that: The transverse column beam (2) comprises a left front transverse column beam (21), a right front transverse column beam (22), a left rear transverse column beam (23) and a right rear transverse column beam (24); the left front transverse column beam (21) and the right front transverse column beam (22) are arranged between the front cone (7) and the combined element (9); the left rear transverse column beam (23) and the right rear transverse column beam (24) are arranged between the rear cone (8) and the combined element (9).

4. A rod-type six-component high-precision micro-roll moment wind tunnel balance according to claim 3, characterized in that: Dissipation sheets (3) are provided on both sides of the rolling crossbeam (4), and the thickness of the dissipation sheets (3) ranges from 0.5 mm to 0.8 mm.

5. A rod-type six-component high-precision micro-roll moment wind tunnel balance according to claim 4, characterized in that: A plurality of first strain gauges (31) are attached to the longitudinal column beam (1), a plurality of second strain gauges (32) are attached to the resistance beam (6), a plurality of third strain gauges (33) are attached to the transverse column beam (2), and a plurality of fourth strain gauges (34) are attached to the rolling crossbeam (4).

6. A rod-type six-component high-precision micro-rolling moment wind tunnel balance measurement method, which is based on the rod-type six-component high-precision micro-rolling moment wind tunnel balance described in claim 5, and is characterized in that: The following steps are involved: Step 1: Paste four first strain gauges (31) on the upper and lower end surfaces of the front upper longitudinal column beam (11) and the front lower longitudinal column beam (12) to form a Wheatstone bridge, which is defined as U1; Step 2: Paste four second strain gauges (32) on the upper and lower end surfaces of the rear upper longitudinal column beam (13) and the rear lower longitudinal column beam (14) to form a Wheatstone bridge, which is defined as U2; Step 3: Paste four third strain gauges (33) on the left and right end surfaces between the left front transverse column beam (21) and the right front transverse column beam (22) to form a Wheatstone bridge, which is defined as U3; Step 4: Paste four third strain gauges (33) on the left and right end surfaces between the left rear transverse column beam (23) and the right rear transverse column beam (24) to form a Wheatstone bridge, which is defined as U4; Step 5: Glue eight fourth strain gauges (34) on the rolling crossbeam (4) to form a Wheatstone bridge, which is located at U5; Step 6: A total of four second strain gauges (32) are pasted on the resistance beam (6) to form a Wheatstone bridge, and the bridge is positioned as U6; Step 7: Calibrate the balance. The six-element load on the balance is determined by the following formula: ； ； ； ； ； ； Among them, Y is the balance lift, Mz is the balance pitch moment, Z is the balance side force, My is the balance yaw moment, Mx is the balance roll moment, and X is the balance drag.

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