A test device for remote control of pitch, sideslip and roll angles of wind tunnel models

Abstract

The present invention relates to a test device for remotely controlling the pitch, sideslip and roll angles of a wind tunnel model, comprising an automatic variable pitch mechanism, an automatic variable roll assembly and an automatic variable sideslip mechanism. The automatic variable pitch mechanism realizes the overall pitch movement of the blade arm, the automatic variable roll assembly and the automatic variable sideslip mechanism under the drive of a second motor assembly. The transmission shaft is respectively fixedly connected to the rotor of the first motor assembly and the cylindrical section of the support arm, and realizes the overall roll movement of the support arm under the drive of the first motor assembly. One end of the automatic variable sideslip mechanism is fixedly connected to the transmission shaft, and the other end is fixedly connected to the tail support rod of the test model, guiding the test model and supporting radial force and normal force, driving the test model to realize sideslip angle transformation, and performing accurate feedback measurement of the sideslip angle. The present invention realizes remote control of the pitch, yaw and roll angles of the test model during the wind tunnel test, greatly improving the test efficiency and reducing the error caused by manual disassembly and assembly of the model.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind tunnel testing, and in particular relates to a testing device for remotely controlling the pitch, sideslip and roll angles of a wind tunnel model. Background Art

[0002] Currently, 1.2-meter-scale wind tunnels typically use a manual side-slip sequence with varying angles of attack to complete a set of test model state tests. This process uses an automatic angle-of-attack mechanism to obtain aerodynamic data for the test model at a specific side-slip angle and different angles of attack. With the development of aerospace, design departments are increasingly demanding aerodynamic data for various operating conditions to improve aircraft maneuverability and aerodynamic performance. This places high demands on the automation level and test accuracy of wind tunnel testing departments.

[0003] Current automated angle-of-attack mechanisms have numerous limitations for testing the aerodynamic performance of aircraft at different angles of attack, sideslip, and roll. Manually changing the sideslip and roll angles is required, making it impossible to test multiple angles of attack, sideslip, and roll in a single test. This results in low test efficiency, and manual state changes are prone to errors. Therefore, to achieve high efficiency and precision in wind tunnel testing, it is crucial to design a test device that allows for remote control of the wind tunnel model's pitch, sideslip, and roll angles. Summary of the Invention

[0004] The technical problem solved by the present invention is to overcome the deficiencies of the prior art and provide a test device for remotely controlling the pitch, sideslip and roll angles of a wind tunnel model.

[0005] The technical solution of the present invention is: a test device for remotely controlling the pitch, sideslip and roll angles of a wind tunnel model, wherein a second motor assembly is installed at a fixed position in the wind tunnel. The test device of the present invention includes an automatic pitch variable mechanism, an automatic roll variable assembly and an automatic sideslip variable mechanism; the rotating axes of the automatic pitch variable mechanism, the automatic roll variable assembly and the automatic sideslip variable mechanism intersect at a point and are perpendicular to each other;

[0006] The automatic pitch-variable mechanism is sleeved on the outside of the automatic roll-variable assembly and is connected to the output shaft of the second motor assembly. The automatic pitch-variable mechanism is driven by the second motor assembly to realize the overall pitch movement of the automatic pitch-variable mechanism, the automatic roll-variable assembly and the automatic sideslip mechanism.

[0007] The automatic roll-variable assembly includes a first motor assembly and a transmission shaft. The transmission shaft has a hollow structure. One end of the transmission shaft is fixedly connected to the first motor assembly, and the other end is fixedly connected to the automatic variable side-slip mechanism. The automatic roll-variable assembly realizes the overall roll motion of the automatic variable side-slip mechanism under the drive of the first motor assembly.

[0008] One end of the automatic variable sideslip mechanism is fixedly connected to the transmission shaft, and the other end is fixedly connected to the tail support rod of the test model. The automatic variable sideslip mechanism guides the test model and supports the radial force and normal force of the test model, drives the test model to achieve sideslip angle change, and performs precise feedback measurement of the sideslip angle.

[0009] Furthermore, the automatic pitch mechanism includes a knife arm assembly, a first arc-shaped rolling guide rail and a first gear transmission pair; the knife arm assembly includes an upper fan-shaped knife arm, a lower fan-shaped knife arm and an intermediate hollow shaft, and the first gear transmission pair includes a first gear and a first rack, and the first gear and the first rack are meshed;

[0010] The rear end of the hollow shaft of the knife arm of the automatic pitch mechanism is fixedly connected to the stator of the first motor assembly, the middle section of the hollow shaft of the knife arm is fitted with the transmission shaft, and the front end of the hollow shaft of the knife arm is fitted with the automatic side sliding mechanism; the output shaft of the second motor assembly is fixedly connected to the first gear, the first rack and the first arc-shaped rolling guide are both fixed on the lower fan-shaped knife arm, and one end of the first arc-shaped rolling guide is connected to the wind tunnel equipment through a slider; the second motor assembly drives the first gear transmission pair to rotate, driving the knife arm assembly to pitch, and the first arc-shaped rolling guide plays a supporting and guiding role in the elevation angle change of the knife arm assembly.

[0011] Furthermore, the middle section of the hollow shaft of the knife arm is sleeved with the transmission shaft through a first bearing.

[0012] Furthermore, the first motor assembly includes a hollow servo motor, a harmonic reducer, a first motor encoder and a first motor brake; one end of the output shaft of the hollow servo motor is connected to the harmonic reducer, and the other end of the output shaft is connected to the first motor brake, and the output of the first motor brake is connected to the first motor encoder; the output shaft of the harmonic reducer is fixedly connected to the transmission shaft.

[0013] Furthermore, the automatic variable side sliding mechanism includes a support arm, a scimitar, a worm gear pair, a third motor assembly, a second gear transmission pair, two second arc-shaped rolling guides, N arc-shaped sliding guides, a limit pin, an encoder, a second bearing, a third bearing and a fourth bearing, where N>2;

[0014] The support arm includes a cylindrical section and a U-shaped section, the scimitar includes a conical section, a sector section, and a limit groove, the worm gear pair includes a worm wheel and a worm, the second gear transmission pair includes a second arc-shaped rack and a second gear shaft, the second arc-shaped rack is meshed with the second gear shaft, a second arc-shaped rolling guide with different radius sizes is arranged on the upper and lower surfaces of the sector section of the scimitar, and no less than one arc-shaped sliding guide with different radius sizes is arranged on the upper and lower inner surfaces of the U-shaped section of the support arm; the conical section of the scimitar is connected to the tail support rod of the test model The upper surface of the fan-shaped segment of the scimitar is fixedly connected to the second arc-shaped rack and the worm gear, and the fan-shaped segment of the scimitar is located between the openings of the U-shaped segment of the support arm; the cylindrical segment of the support arm is fitted with the front end of the hollow shaft of the knife arm of the automatic pitch mechanism through the second bearing, the U-shaped segment of the support arm is connected to the worm through the third bearing, and is connected to the second gear shaft through the fourth bearing, and is fixedly connected to the limit pin, the third motor assembly and the arc-shaped sliding guide rail; the stator of the encoder is fixedly connected to the U-shaped segment of the support arm, and the rotor of the encoder is fixedly connected to the second gear shaft;

[0015] The scimitar guides the test model through the second arc-shaped rolling guide and supports the radial force of the test model. The arc-shaped sliding guide supports the normal force of the test model. The third motor assembly drives the worm gear pair to achieve the sideslip angle change of the test model. The second gear transmission pair is connected to the encoder to achieve accurate feedback measurement of the sideslip angle.

[0016] The end of the limiting pin is placed in the limiting groove of the scimitar. When the scimitar reaches the limit position, the limiting pin collides and interferes with the scimitar, thereby restricting the scimitar from continuing to move.

[0017] Furthermore, the sideslip angle change of the test model is defined as △β, the transmission ratio of the second gear transmission pair is i, and the rotation angle of the encoder is i×△β.

[0018] Furthermore, the cross section of the worm wheel in the worm gear pair is L-shaped, one working surface of the worm wheel is in contact with the arc surface of the upper surface of the scimitar sector, and the other working surface is in contact with the side end surface plane of the scimitar sector and in contact with the worm.

[0019] Furthermore, one end of the worm in the worm gear pair is fixedly connected to the output shaft of the third motor assembly, and a hexagonal hole is processed on the end face of the other end. When the third motor assembly fails, the worm is rotated by engaging the hexagonal hole of the worm with a wrench to achieve manual adjustment of the side slip angle of the test model.

[0020] Furthermore, the N arc-shaped sliding guide rails are all placed between the upper and lower surfaces of the scimitar fan-shaped section and the upper and lower inner surfaces of the U-shaped section of the support arm, and only cooperate and position the scimitar side sliding axis direction. The scimitar and the support arm are made of alloy steel, and the arc-shaped sliding guide rails are made of copper alloy or self-lubricating wear-resistant material.

[0021] Furthermore, when the automatic variable roll assembly drives the automatic variable sideslip mechanism to roll 90°, the automatic variable sideslip mechanism becomes an angle of attack mechanism, overlapping the functions of the automatic variable pitch mechanism, thereby expanding the pitch angle change range of the test model.

[0022] The beneficial effects of the present invention compared with the prior art are:

[0023] (1) The present invention provides a test device for remote control of the pitch, sideslip and roll angles of a wind tunnel model. By designing automatic roll and automatic sideslip mechanisms on the automatic angle of attack mechanism, remote control of the three postures of the test model is achieved.

[0024] (2) The present invention can realize the conversion of the automatic sideslip mechanism into an angle-of-attack auxiliary mechanism by means of an automatic rolling mechanism, thereby improving the motion range of the angle-of-attack mechanism; by designing a motor assembly with a brake and a worm gear with a self-locking transmission method, the self-locking functions of the model pitch and roll and the dual self-locking functions of the sideslip are realized respectively.

[0025] (3) The present invention realizes the accurate measurement of the amplified side slip angle error of the model by adopting a combination of a gear transmission pair and an encoder; and realizes the test requirements of large-scale model atmospheric dynamic load stress by adopting a combination of an arc-shaped sliding guide rail to support the normal force and an arc-shaped rolling guide rail to guide and position the radial force.

[0026] (4) The present invention protects the range of motion of the model by adopting the soft limit of the motor assembly with encoder and the gear transmission sub-encoder and the hard limit of the limit pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A two-dimensional cross-sectional view of a test device according to an embodiment of the present invention;

[0028] Figure 2 This is a cross-sectional view of the structure of the test device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to the accompanying drawings.

[0030] The present invention provides a wind tunnel force testing device that automatically switches between free and forced rotation. A second motor assembly (4) is mounted at a fixed position within the wind tunnel. The device comprises an automatic pitch mechanism, an automatic roll assembly, and an automatic sideslip mechanism. The rotating axes of the automatic pitch mechanism, the automatic roll assembly, and the automatic sideslip mechanism intersect at a single point and are perpendicular to each other, ensuring a single reference point for the test model's position changes during wind tunnel testing.

[0031] The automatic pitch variable mechanism is sleeved on the outside of the automatic roll variable assembly, and the automatic pitch variable mechanism is connected to the output shaft of the second motor assembly 4. Under the drive of the second motor assembly 4, the automatic pitch variable mechanism realizes the overall pitch movement of the automatic pitch variable mechanism, the automatic roll variable assembly and the automatic sideslip mechanism.

[0032] The automatic variable roll assembly includes a first motor assembly 1, a transmission shaft 2 and a first bearing 3. The transmission shaft 2 has a hollow structure. One end of the transmission shaft 2 is fixedly connected to the first motor assembly 1, and the other end is fixedly connected to the automatic variable side sliding mechanism. The automatic variable roll assembly realizes the overall rolling movement of the automatic variable side sliding mechanism under the drive of the first motor assembly 1.

[0033] One end of the automatic side-slip mechanism is fixedly connected to the transmission shaft 2, and the other end is fixedly connected to the tail support rod of the test model. The automatic side-slip mechanism guides the test model and supports the radial force and normal force of the test model, drives the test model to achieve side-slip angle change, and performs accurate feedback measurement of the side-slip angle.

[0034] like Figure 1 As shown, the automatic pitch mechanism includes a knife arm assembly 7, a first arc-shaped rolling guide 8 and a first gear transmission pair 5-6; the knife arm assembly 7 includes two upper and lower fan-shaped knife arms 71 and an intermediate hollow shaft 72, and the first gear transmission pair 5-6 includes a first gear 5 and a first rack 6, and the first gear 5 and the first rack 6 are meshed.

[0035] The rear end of the hollow shaft 72 of the knife arm of the automatic pitch mechanism is fixedly connected to the stator of the first motor assembly 1, the middle section of the hollow shaft 72 of the knife arm is fitted with the transmission shaft 2 through the first bearing 3, and the front end of the hollow shaft 72 of the knife arm is fitted with the automatic side sliding mechanism; the output shaft of the second motor assembly 4 is fixedly connected to the first gear 5, the first rack 6 and the first arc-shaped rolling guide 8 are both fixed on the lower fan-shaped knife arm, and one end of the first arc-shaped rolling guide 8 is connected to the wind tunnel equipment through a slider; the second motor assembly 4 drives the first gear transmission pair 5-6 to rotate, driving the knife arm assembly 7 to pitch, and the first arc-shaped rolling guide 8 plays a supporting and guiding role in the elevation angle change of the knife arm assembly 7.

[0036] In this embodiment, the first motor assembly 1 includes a hollow servo motor, a harmonic reducer, a first motor encoder and a first motor brake; the front end of the output shaft of the hollow servo motor is connected to the harmonic reducer, the rear end of the output shaft is connected to the first motor brake, and the output of the first motor brake is connected to the first motor encoder; the output shaft of the harmonic reducer is fixedly connected to the drive shaft 2.

[0037] like Figure 1 and Figure 2As shown, the automatic variable side sliding mechanism includes a support arm 9, a scimitar 26, a worm gear pair 10-11, a third motor assembly 23, a second gear transmission pair 18-19, a second arc-shaped rolling guide 15-16, an arc-shaped sliding guide 12-14, a limit pin 17, an encoder 20, a second bearing 22, a third bearing 25 and a fourth bearing 21.

[0038] The support arm 9 includes a cylindrical section and a U-shaped section, the scimitar 26 includes a conical section, a sector section, and a limit groove 24, the worm gear pair 10-11 includes a worm wheel 10 and a worm 11, the second gear transmission pair 18-19 includes a second arc-shaped rack 18 and a second gear shaft 19, and second arc-shaped rolling guides 15-16 of different radius sizes are arranged on the upper and lower surfaces of the sector section of the scimitar 26, and at least one arc-shaped sliding guide 12-14 of different radius sizes is arranged on the upper and lower inner surfaces of the U-shaped section of the support arm 9; in this embodiment, two arc-shaped sliding guides 12 and 14 are arranged on the upper inner surface of the U-shaped section of the support arm 9, and one arc-shaped sliding guide 13 is arranged on the lower inner surface. The arc-shaped sliding guides 12-14 only cooperate and position the scimitar 26 in the side sliding rotation axis direction.

[0039] The conical section of the scimitar 26 is fixedly connected to the tail support rod of the test model, and the upper surface of the fan-shaped section of the scimitar 26 is fixedly connected to the second arc-shaped rack 18 and the worm gear 10. The fan-shaped section of the scimitar 26 is located between the openings of the U-shaped section of the support arm 9. The cylindrical section of the support arm 9 is fitted with the front end of the hollow shaft 72 of the blade arm of the automatic pitch mechanism via the second bearing 22. The U-shaped section of the support arm 9 is connected to the worm 11 via the third bearing 25 and to the second gear shaft 19 via the fourth bearing 21. It is also fixedly connected to the limit pin 17, the third motor assembly 23, and the arc-shaped sliding guide rails 12-14. The stator of the encoder 20 is fixedly connected to the U-shaped section of the support arm 9, and the rotor of the encoder 20 is fixedly connected to the second gear shaft 19. The end of the limit pin 17 is placed in the limit slot 24 of the scimitar 26. When the scimitar 26 reaches the limit position, the limit pin 17 collides with the scimitar 26, thereby restricting the scimitar 26 from further movement.

[0040] The scimitar 26 guides the test model and supports the radial force of the test model through the second arc-shaped rolling guide rails 15-16, supports the normal force of the test model through the arc-shaped sliding guide rails 12-14, drives the worm gear pair through the third motor assembly 23 to realize the sideslip angle change of the test model, and is connected to the encoder 20 through the second gear transmission pair to realize accurate feedback measurement of the sideslip angle.

[0041] In this embodiment, the third motor assembly 23 includes a servo motor, a reducer, a second motor encoder and a second motor brake. The front end of the output shaft of the servo motor is connected to the reducer, the rear end of the output shaft is connected to the second motor brake, and the output of the second motor brake is connected to the second motor encoder; one end of the worm 11 is fixedly connected to the output shaft of the reducer.

[0042] Furthermore, the worm wheel 10 in the worm gear pair has an L-shaped cross-section. One working surface of the worm wheel 10 is in contact with the upper curved surface of the scimitar 26 segment, while the other working surface is in contact with the side end surface of the scimitar 26 segment and contacts the worm 11. One end of the worm 11 is fixedly connected to the output shaft of the third motor assembly 23, and the other end is machined with a hexagonal hole. In the event of failure of the third motor assembly 23, the worm 11 can be manually adjusted by rotating it with a wrench through the hexagonal hole to achieve the test model's side slip angle.

[0043] Furthermore, in this embodiment, the scimitar 26 and the support arm 9 are made of high-strength alloy steel, and the arc-shaped sliding guide rails 12-14 are made of copper alloy or self-lubricating wear-resistant material.

[0044] In this embodiment, the sideslip angle change of the test model is defined as Δβ, the transmission ratio of the second gear transmission pair is i, and the rotation angle of the encoder 20 is i×Δβ.

[0045] For the test device of the present invention, when the automatic variable roll assembly drives the automatic variable sideslip mechanism to roll 90°, the automatic variable sideslip mechanism becomes an angle of attack mechanism, overlapping the functions of the automatic variable pitch mechanism, and can expand the pitch angle change range of the test model. At the same time, the rotating axes of the automatic variable pitch mechanism, the automatic variable roll assembly, and the automatic variable sideslip mechanism intersect at a single point, ensuring that the test model's position change reference point during the wind tunnel test is unique. By providing the automatic variable pitch mechanism, the automatic variable roll assembly, and the automatic variable sideslip mechanism, remote control of the test model's pitch, yaw, and roll angles during the wind tunnel test is achieved.

[0046] Although the present invention has been disclosed above in terms of preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solutions of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the scope of protection of the technical solutions of the present invention.

Claims

1. A test device for remotely controlling the pitch, sideslip, and roll angles of a wind tunnel model, wherein a second motor assembly is installed at a fixed position in the wind tunnel, characterized in that: It includes an automatic pitch-variable mechanism, an automatic roll-variable assembly, and an automatic sideslip-variable mechanism; the rotating axes of the automatic pitch-variable mechanism, the automatic roll-variable assembly, and the automatic sideslip-variable mechanism intersect at one point and are perpendicular to each other; The automatic pitch-variable mechanism is sleeved on the outside of the automatic roll-variable assembly and is connected to the output shaft of the second motor assembly. The automatic pitch-variable mechanism is driven by the second motor assembly to realize the overall pitch movement of the automatic pitch-variable mechanism, the automatic roll-variable assembly and the automatic sideslip mechanism. The automatic roll-variable assembly includes a first motor assembly and a transmission shaft, one end of the transmission shaft is fixedly connected to the first motor assembly, and the other end is fixedly connected to the automatic variable side slip mechanism. The automatic roll-variable assembly realizes the overall roll motion of the automatic variable side slip mechanism under the drive of the first motor assembly; One end of the automatic side-slip mechanism is fixedly connected to the transmission shaft, and the other end is fixedly connected to the tail support rod of the test model; The automatic variable side sliding mechanism includes a support arm, a scimitar, a worm gear pair, a third motor assembly, a second gear transmission pair, an encoder, a second bearing, a third bearing and a fourth bearing; The support arm includes a cylindrical section and a U-shaped section, the scimitar includes a conical section, a sector section, and a limiting groove, the worm gear pair includes a worm wheel and a worm, the second gear transmission pair includes a second arc-shaped rack and a second gear shaft, the second arc-shaped rack is meshed with the second gear shaft, a second arc-shaped rolling guide rail with different radius sizes is arranged on the upper and lower surfaces of the sector section of the scimitar, and no less than one arc-shaped sliding guide rail with different radius sizes is arranged on the upper and lower inner surfaces of the U-shaped section of the support arm; the conical section of the scimitar is fixedly connected to the tail support rod of the test model, the upper surface of the sector section of the scimitar is fixedly connected to the second arc-shaped rack and the worm wheel, and the sector section of the scimitar is located between the openings of the U-shaped section of the support arm; the U-shaped section of the support arm is connected to the worm through a third bearing, connected to the second gear shaft through a fourth bearing, and fixedly connected to the third motor assembly and the arc-shaped sliding guide rail; the stator of the encoder is fixedly connected to the U-shaped section of the support arm, and the rotor of the encoder is fixedly connected to the second gear shaft; The scimitar guides the test model and supports the radial force of the test model through the second arc-shaped rolling guide, supports the normal force of the test model through the arc-shaped sliding guide, drives the worm gear pair through the third motor assembly to realize the sideslip angle change of the test model, and is connected to the encoder through the second gear transmission pair to realize accurate feedback measurement of the sideslip angle.

2. A wind tunnel model pitch, sideslip and roll angle remote control test device according to claim 1, characterized in that: The automatic pitch mechanism includes a knife arm assembly, a first arc-shaped rolling guide rail and a first gear transmission pair; the knife arm assembly includes an upper fan-shaped knife arm, a lower fan-shaped knife arm and a knife arm hollow shaft, and the first gear transmission pair includes a first gear and a first rack, and the first gear and the first rack are meshed; The rear end of the hollow shaft of the knife arm of the automatic pitch mechanism is fixedly connected to the stator of the first motor assembly, the middle section of the hollow shaft of the knife arm is fitted with the transmission shaft, and the front end of the hollow shaft of the knife arm is fitted with the automatic side sliding mechanism; the output shaft of the second motor assembly is fixedly connected to the first gear, the first rack and the first arc-shaped rolling guide are both fixed on the lower fan-shaped knife arm, and one end of the first arc-shaped rolling guide is connected to the wind tunnel equipment through a slider; the second motor assembly drives the first gear transmission pair to rotate, driving the knife arm assembly to pitch, and the first arc-shaped rolling guide plays a supporting and guiding role in the elevation angle change of the knife arm assembly.

3. A wind tunnel model pitch, sideslip and roll angle remote control test device according to claim 2, characterized in that: The middle section of the hollow shaft of the knife arm is sleeved with the transmission shaft through a first bearing.

4. The test device for remotely controlling the pitch, sideslip and roll angles of a wind tunnel model according to claim 1, characterized in that: The first motor assembly includes a hollow servo motor, a harmonic reducer, a first motor encoder and a first motor brake; one end of the output shaft of the hollow servo motor is connected to the harmonic reducer, and the other end of the output shaft is connected to the first motor brake, and the output of the first motor brake is connected to the first motor encoder; the output shaft of the harmonic reducer is fixedly connected to the transmission shaft.

5. The test device for remotely controlling the pitch, sideslip and roll angles of a wind tunnel model according to claim 1, characterized in that: The automatic variable side sliding mechanism also includes a limiting pin, the cylindrical section of the support arm is sleeved with the front end of the hollow shaft of the knife arm of the automatic variable pitch mechanism through a second bearing, and the U-shaped section of the support arm is also fixedly connected to the limiting pin; The end of the limiting pin is placed in the limiting groove of the scimitar. When the scimitar reaches the limit position, the limiting pin collides and interferes with the scimitar, thereby restricting the scimitar from continuing to move.

6. A wind tunnel model pitch, sideslip and roll angle remote control test device according to claim 5, characterized in that: Define the sideslip angle change of the test model as △β, the transmission ratio of the second gear transmission pair as i, and the rotation angle of the encoder as i×△β.

7. The test device for remotely controlling the pitch, sideslip and roll angles of a wind tunnel model according to claim 5, characterized in that: The cross section of the worm wheel in the worm gear pair is L-shaped, one working surface of the worm wheel is in contact with the arc surface of the upper surface of the scimitar sector, and the other working surface is in contact with the side end surface plane of the scimitar sector and in contact with the worm.

8. The test device for remotely controlling the pitch, sideslip and roll angles of a wind tunnel model according to claim 5, characterized in that: One end of the worm in the worm gear pair is fixedly connected to the output shaft of the third motor assembly, and the other end face is processed with an inner hexagonal hole. When the third motor assembly fails, the worm is rotated by engaging the inner hexagonal hole of the worm with a wrench to achieve manual adjustment of the sideslip angle of the test model.

9. The test device for remotely controlling the pitch, sideslip and roll angles of a wind tunnel model according to claim 5, characterized in that: The N arc-shaped sliding guide rails are all placed between the upper and lower surfaces of the scimitar fan-shaped segment and the upper and lower inner surfaces of the U-shaped segment of the support arm, and only cooperate and position the scimitar side sliding axis direction. The scimitar and the support arm are made of alloy steel, and the arc-shaped sliding guide rails are made of copper alloy or self-lubricating wear-resistant material.

10. The test device for remotely controlling the pitch, sideslip and roll angles of a wind tunnel model according to claim 1, characterized in that: When the automatic variable roll assembly drives the automatic variable sideslip mechanism to roll 90°, the automatic variable sideslip mechanism becomes an angle of attack mechanism, overlapping the functions of the automatic variable pitch mechanism, and expanding the pitch angle change range of the test model.

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