Multi-degree-of-freedom control and measurement system for high-speed wind tunnel test

Abstract

The invention provides a multi-degree-of-freedom control and measurement system for a high-speed wind tunnel test. The multi-degree-of-freedom control and measurement system comprises a pitching motion mechanism, a supporting device, a sideslip motion mechanism and a rolling motion mechanism, the rolling movement mechanism is connected with the mounting disc, the sideslip movement mechanism is connected with the rolling movement mechanism, one end of the supporting device is connected with the sideslip movement mechanism, and the other end of the supporting device penetrates through a through groove formed in the middle of the wind tunnel test model and then is connected with the pitching movement mechanism; one end of the wind tunnel measuring balance is fixedly connected with the interior of the wind tunnel test model, and the other end is connected with the pitching motion mechanism; wherein the rolling motion mechanism is used for allowing rolling motion of the wind tunnel test model, the sideslip motion mechanism is used for allowing sideslip motion of the wind tunnel test model, and the pitching motion mechanism is used for allowing pitching motion of the wind tunnel test model. The multi-degree-of-freedom flight simulation test of the high-speed wind tunnel can be met, single-degree-of-freedom or multi-degree-of-freedom controlled flight is controlled according to test requirements, and the motion state and aerodynamic characteristic parameters of the model are fed back in real time.

Description

Technical Field

[0001] The invention belongs to the technical field of wind tunnel tests and relates to a multi-degree-of-freedom control and measurement system for high-speed wind tunnel tests. Background Art

[0002] In order to verify the flight control rate under the conditions of aerodynamic / motion / control coupling of the aircraft, it is necessary to carry out simulated flight tests of the aircraft in the wind tunnel. In the traditional wind tunnel test, the test gas flows, the test model is fixed, and relative motion is generated between the test gas and the test model, so as to obtain the aerodynamic characteristics of the test model under the action of the current airflow. During the simulated flight test, the test model cannot be completely fixed, and measures need to be taken to control the attitude of the test model. When the speed is relatively low, the wind tunnel test model is large in size, the model is fixed in many ways, and the support interference is small. As the test speed increases, the model size becomes smaller due to the limitation of the wind tunnel caliber, and the support interference increases. Model design becomes a key issue in high-speed wind tunnel simulated flight tests. The test model has three rotational degrees of freedom and three translational degrees of freedom. Since the test model needs to complete the test in the fixed area of ​​the wind tunnel test section, the translation of the test model is difficult to achieve. In order to meet the needs of simulated flight tests, the rotational freedom of the test model needs to be achieved as much as possible. Due to the narrow internal space of the small-scale model, there is no mature motion mechanism for high-speed wind tunnel simulated flight tests. Summary of the invention

[0003] The present invention aims to solve at least one of the problems existing in the prior art.

[0004] To this end, the present invention provides a multi-degree-of-freedom control and measurement system for high-speed wind tunnel tests, which can meet the needs of high-speed wind tunnel multi-degree-of-freedom simulated flight tests, control single-degree-of-freedom or multi-degree-of-freedom controlled flight according to test needs, and provide real-time feedback on the model's motion state and aerodynamic characteristic parameters.

[0005] The technical solution of the present invention is:

[0006] A multi-degree-of-freedom control and measurement system for high-speed wind tunnel testing, comprising: a pitch motion mechanism, a support device, a side-slip motion mechanism, a roll motion mechanism and a mounting plate;

[0007] The peripheral equipment includes: a wind tunnel test model and a wind tunnel measurement balance; a through groove is processed in the middle of the wind tunnel test model;

[0008] The mounting plate is fixed in the wind tunnel test section; the rolling motion mechanism is connected to the mounting plate through a connecting component A, the side-slip motion mechanism is connected to the rolling motion mechanism through a connecting component B, one end of the supporting device is connected to the side-slip motion mechanism, and the other end of the supporting device is connected to the pitching motion mechanism; and the supporting device passes through the through slot of the wind tunnel test model; one end of the wind tunnel measurement balance is fixedly connected to the inside of the wind tunnel test model, and the other end is connected to the pitching motion mechanism; wherein the rolling motion mechanism is used to allow the wind tunnel test model to rotate around the horizontal axis under the action of the wind tunnel test airflow, thereby completing the rolling motion of the wind tunnel test model, the side-slip motion mechanism is used to allow the wind tunnel test model to rotate around the vertical axis under the action of the wind tunnel test airflow, thereby completing the side-slip motion of the wind tunnel test model, let the horizontal axis be the X-axis, the vertical axis be the Y-axis, then the axis perpendicular to the XY plane is the Z-axis, and the pitching motion mechanism is used to allow the wind tunnel test model to rotate around the Z-axis under the action of the wind tunnel test airflow, thereby completing the pitching motion of the wind tunnel test model.

[0009] Furthermore, the pitch motion mechanism comprises: a pitch connecting shaft, a pitch clamping sleeve, a pitch angle encoder and a brake assembly;

[0010] The axis of the pitch connection shaft is arranged along the Z axis; the pitch jacket is installed on the outside of the pitch connection shaft through the pitch bearing, and the pitch connection shaft and the pitch jacket rotate relative to each other through the pitch bearing; wherein the upper part of the pitch jacket is fixedly connected to the support device, and the outer circumferential surface of the pitch connection shaft is fixedly connected to the end of the wind tunnel measurement balance, and when the pitch jacket is kept fixed with the support device, under the action of the wind tunnel flow field, the fixed integral structure composed of the wind tunnel test model, the wind tunnel measurement balance and the pitch connection shaft can rotate around the axis direction of the pitch connection shaft, that is, rotate around the Z axis, to complete the pitch movement of the wind tunnel test model;

[0011] The pitch angle encoder is installed between the pitch connection shaft and the pitch jacket, and is used to measure the relative rotation angle between the pitch connection shaft and the pitch jacket, thereby obtaining the rotation angle of the pitch motion of the wind tunnel test model;

[0012] The brake assembly is used to brake the rotation of the pitch connection shaft, thereby controlling the opening and closing of the pitch rotation channel of the wind tunnel test model.

[0013] Furthermore, a gap is left between the support device and the inner surface of the through slot of the wind tunnel test model, so that the wind tunnel test model will not interfere with the support device when it is controlled to perform pitch motion.

[0014] Further, the brake assembly includes: a compressed air source, a brake cylinder, a return spring and a brake rod;

[0015] The outer circumferential surface of the pitch connection shaft is processed with a U-shaped braking groove, the longitudinal direction of the U-shaped braking groove is arranged along the circumferential direction of the pitch connection shaft, and the transverse direction of the U-shaped braking groove is arranged along the axial direction of the pitch connection shaft; the cross section of the U-shaped braking groove is a trapezoid, the longitudinal two side surfaces of the U-shaped braking groove are braking surfaces, and the transverse two side surfaces of the braking groove are protective surfaces;

[0016] The brake cylinder is integrally connected to the lower end surface of the support device, the rear end head of the brake rod is fixed in the brake cylinder through a return spring, the brake rod can slide along the brake cylinder, and the front end head of the brake rod is a trapezoidal friction head;

[0017] Initially, the return spring is at its original length, and the brake rod is retracted into the brake cylinder; when the pitch motion mechanism has a braking demand, the compressed gas source fills the compressed gas into the brake cylinder, and the compressed gas in the brake cylinder pushes the brake rod to overcome the pulling force of the return spring and then extend, and the front end of the brake rod contacts the brake groove, and the trapezoidal friction head of the brake rod cooperates with the braking surface of the brake groove to form a sliding friction pair, and the friction between the two forms a rotation brake on the pitch connection shaft, that is, the pitch connection shaft cannot rotate, and the pitch rotation channel of the wind tunnel test model is closed; when the pitch motion mechanism has no braking demand, the compressed gas in the brake cylinder is discharged, and the brake rod will return to the initial position under the pull of the return spring, and the brake rod will be out of contact with the brake groove, the brake is released, and the pitch rotation channel of the high-speed wind tunnel test model is opened, and the overall structure composed of the wind tunnel test model, the wind tunnel measurement balance and the pitch connection shaft can rotate around the axis direction of the pitch connection shaft to complete the pitch motion of the wind tunnel test model.

[0018] Furthermore, the side-slip motion mechanism includes: a side-slip jacket, a side-slip angle encoder, a side-slip electric clutch and a side-slip connecting shaft;

[0019] The axis of the side-slip connecting shaft is arranged along the Y axis, and the side-slip connecting shaft is fixedly connected to the upper end surface of the supporting device; the top of the side-slip jacket is connected to the rolling motion mechanism, and the side-slip jacket is the connecting component B; and the bottom of the side-slip jacket is installed on the outside of the side-slip connecting shaft through the side-slip bearing, and the side-slip jacket and the side-slip connecting shaft rotate relative to each other through the side-slip bearing; the side-slip electric clutch is installed on the outside of the side-slip connecting shaft, one end of the side-slip electric clutch is fixedly connected to the side-slip connecting shaft, and the other end of the side-slip electric clutch is fixedly connected to the side-slip jacket; the side-slip electric clutch is used to control the opening and closing of the side-slip channel of the wind tunnel test model;

[0020] The sideslip angle encoder is installed between the sideslip jacket and the sideslip connecting shaft, and is used to measure the relative rotation angle between the sideslip jacket and the sideslip connecting shaft, thereby obtaining the rotation angle of the sideslip motion of the wind tunnel test model.

[0021] Furthermore, when the sideslip electric clutch is closed, the two ends of the sideslip electric clutch are in a separated state, and the sideslip jacket and the sideslip connecting shaft can rotate relative to each other. When the pitch rotation channel of the wind tunnel test model is closed, the sideslip connecting shaft, the supporting device, the pitch connecting shaft, the wind tunnel measurement balance and the wind tunnel test model form a fixed overall structure, and the sideslip connecting shaft rotates around the Y axis, synchronously driving the wind tunnel test model to rotate around the Y axis to complete the sideslip motion of the wind tunnel test model; when the pitch rotation channel of the wind tunnel test model is opened, the sideslip connecting shaft, the supporting device, the pitch motion mechanism, the wind tunnel measurement balance and the wind tunnel test model form an overall structure in which the wind tunnel test model can undergo pitch motion, and the sideslip connecting shaft rotates around the Y axis, synchronously driving the wind tunnel test model to rotate around the Y axis to complete the sideslip + pitch motion of the wind tunnel test model; therefore, when the sideslip electric clutch is closed, the sideslip channel of the wind tunnel test model is opened;

[0022] When the side-slip electric clutch is opened, both ends of the side-slip electric clutch are in a connected state, the side-slip jacket and the side-slip connecting shaft are locked into an integrated structure, and the two cannot rotate relative to each other, thereby closing the side-slip channel of the wind tunnel test model.

[0023] Further, the rolling motion mechanism includes: a rolling electric clutch, a rolling bearing, a rolling angle encoder, a rolling sleeve and a rolling connecting shaft;

[0024] The roll connection shaft is an L-shaped rod, the vertical part of the L-shaped rod is arranged along the vertical axis and fixedly connected to the mounting plate, and the horizontal part of the L-shaped rod is arranged along the X-axis; the roll connection shaft is the connecting component A; the outer circumferential surface of the roll jacket is fixedly connected to the top of the side sliding jacket; and the roll jacket is installed on the outside of the horizontal part of the roll connection shaft through a roll bearing, and the roll jacket and the horizontal part of the roll connection shaft rotate relative to each other through the roll bearing; the roll electric clutch is installed on the outside of the horizontal part of the roll connection shaft, one end of the roll electric clutch is fixedly connected to the horizontal part of the roll connection shaft, and the other end of the roll electric clutch is fixedly connected to the roll jacket; the roll electric clutch is used to control the opening and closing of the roll channel of the wind tunnel test model;

[0025] The roll angle encoder is installed between the roll jacket and the horizontal part of the roll connection shaft, and is used to measure the relative rotation angle between the roll jacket and the horizontal part of the roll connection shaft, thereby obtaining the rotation angle of the roll motion of the wind tunnel test model.

[0026] Furthermore, when the roll electric clutch is closed, the two ends of the roll electric clutch are in a separated state, and the horizontal parts of the roll jacket and the roll connecting shaft can rotate relative to each other. When the pitch rotation channel and the sideslip channel of the wind tunnel test model are closed, the roll jacket, the sideslip jacket, the sideslip connecting shaft, the supporting device, the pitch connecting shaft, the wind tunnel measurement balance and the wind tunnel test model form a fixed overall structure, and the roll jacket rotates around the X-axis, synchronously driving the wind tunnel test model to rotate around the X-axis to complete the roll motion of the wind tunnel test model; when the pitch rotation channel and the sideslip channel of the wind tunnel test model are opened, the roll jacket, the sideslip motion mechanism, the supporting device, the pitch motion mechanism , the wind tunnel measurement balance and the wind tunnel test model constitute the overall structure of the wind tunnel test model that can undergo pitch + sideslip motion, the rolling jacket rotates around the X-axis, synchronously driving the wind tunnel test model to rotate around the X-axis, completing the roll + sideslip + pitch motion of the wind tunnel test model; when the pitch rotation channel of the wind tunnel test model is closed and the sideslip channel is opened, or the pitch rotation channel of the wind tunnel test model is opened and the sideslip channel is closed, the rolling jacket rotates around the X-axis, synchronously driving the wind tunnel test model to rotate around the X-axis, completing the roll + sideslip motion of the wind tunnel test model or the roll + pitch motion of the wind tunnel test model; therefore, when the roll electric clutch is closed, the roll channel of the wind tunnel test model is opened;

[0027] When the rolling electric clutch is opened, the two ends of the rolling electric clutch are in a connected state, the rolling jacket and the horizontal part of the rolling connecting shaft are locked into an integrated structure, and the two cannot rotate relative to each other, thereby closing the rolling channel of the wind tunnel test model.

[0028] Furthermore, the cross section of the support device is wedge-shaped, and the support device is swept back as a whole to form a preset angle with the wind tunnel test model.

[0029] By applying the above technical solution, the present invention has the following beneficial effects:

[0030] (1) The present invention arranges a rotational motion mechanism (i.e., a pitch motion mechanism, a sideslip motion mechanism, and a roll motion mechanism) and motion measurement (i.e., a pitch angle encoder, a sideslip angle encoder, and a roll angle encoder) and a control device (i.e., a brake assembly, a sideslip electric clutch, and a roll electric clutch) inside and on a support of a wind tunnel test model of an aircraft to realize rotation of the wind tunnel test model in multiple rotational degrees of freedom, thereby providing multi-degree-of-freedom controlled flight conditions for a high-speed wind tunnel simulated flight test.

[0031] (2) The three sets of rotational motion mechanisms of the present invention (i.e., the pitch motion mechanism, the sideslip motion mechanism, and the roll motion mechanism) can work individually or in combination, and can realize individual pitch motion control, individual sideslip motion control, individual roll motion control, pitch + sideslip motion control, pitch + roll motion control, sideslip + roll motion control, and pitch + sideslip + roll motion control, thus meeting the requirements of high-speed wind tunnel multi-degree-of-freedom simulated flight tests.

[0032] (3) The support device of the present invention passes through the through slot of the wind tunnel test model, and a gap is left between the support device and the inner surface of the through slot of the wind tunnel test model. When the wind tunnel test model is controlled to perform pitch motion, it will not interfere with the support device, thereby ensuring that the wind tunnel balance measurement is not affected by the support device, and achieving reliable pitch motion and accurate balance measurement.

[0033] (4) The present invention adopts a pneumatically controlled brake assembly to control the opening and closing of the pitch rotation channel of the wind tunnel test model, and utilizes compressed gas to drive a small telescopic brake assembly to solve the problem that the coaxial brake assembly cannot be installed in the narrow space inside the wind tunnel test model.

[0034] (5) The present invention adopts a side-slip electric clutch to control the opening and closing of the side-slip rotation channel of the wind tunnel test model, and adopts a rolling electric clutch to control the opening and closing of the rolling rotation channel of the wind tunnel test model, which can realize rapid braking of large-scale moving objects, and the motion execution control is simple and the feedback signal is stable.

[0035] (6) The wind tunnel balance used in the present invention has one end fixedly connected to the wind tunnel test model and the other end fixedly connected to the pitch connection axis of the pitch motion mechanism, thereby realizing the force / torque measurement of the wind tunnel test model while meeting the movement and braking requirements of the wind tunnel test model. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The included drawings are used to provide a further understanding of the embodiments of the present invention, which constitute a part of the specification, are used to illustrate the embodiments of the present invention, and together with the text description, explain the principles of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 It is a schematic diagram of the layout of the multi-degree-of-freedom control and measurement system;

[0038] Figure 2 It is a schematic diagram of the principle of multi-degree-of-freedom control and measurement system;

[0039] Figure 3 It is a schematic diagram of the working principle of the pitch motion mechanism;

[0040] Figure 4It is a schematic diagram of the working principle of the side sliding motion mechanism;

[0041] Figure 5 It is a schematic diagram of the working principle of the rolling motion mechanism.

[0042] Among them, 1-wind tunnel test model, 2-multi-degree-of-freedom control and measurement system, 3-wind tunnel measurement balance, 4-pitch motion mechanism, 5-support device, 6-side sliding motion mechanism, 7-roll motion mechanism, 8-mounting plate, 9-pitch jacket, 10-pitch connecting shaft, 11-pitch angle encoder, 12-mouth-shaped brake groove, 13-brake rod, 14-brake cylinder, 15-return spring, 16-side sliding jacket, 17-side sliding angle encoder, 18-side sliding bearing, 19-side sliding electric clutch, 20-side sliding connecting shaft, 21-roll electric clutch, 22-roll bearing, 23-roll angle encoder, 24-roll jacket, 25-roll connecting shaft, 26-pitch bearing. DETAILED DESCRIPTION

[0043] It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0045] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0046] This embodiment provides a multi-degree-of-freedom control and measurement system for high-speed wind tunnel testing. Figure 1 and Figure 2 , the multi-degree-of-freedom control and measurement system 2 includes: a pitch motion mechanism 4, a support device 5, a side-slip motion mechanism 6, a rolling motion mechanism 7 and a mounting plate 8;

[0047] The peripheral equipment includes: a wind tunnel test model 1 and a wind tunnel measurement balance 3; the multi-degree-of-freedom control and measurement system 2 is located in the middle of the high-speed test model 1 as a whole, and the multi-degree-of-freedom control and measurement system 2 is connected to the high-speed wind tunnel test model 1 through the wind tunnel measurement balance 3; a through groove is processed in the middle of the wind tunnel test model 1;

[0048] The mounting plate 8 is fixed in the wind tunnel test section; the rolling motion mechanism 7 is connected to the mounting plate 8 through the connecting component A, the side sliding motion mechanism 6 is connected to the rolling motion mechanism 7 through the connecting component B, one end of the supporting device 5 is connected to the side sliding motion mechanism 6, and the other end of the supporting device 5 is connected to the pitching motion mechanism 4; and the supporting device 5 passes through the through slot of the wind tunnel test model 1; one end of the wind tunnel measurement balance 3 is fixedly connected to the inside of the wind tunnel test model 1, and the other end is connected to the pitching motion mechanism 4; wherein the rolling motion mechanism 7 is used to allow the wind tunnel test model 1 to rotate around the horizontal axis under the action of the wind tunnel test airflow The wind tunnel test model 1 is configured to rotate around the vertical axis under the action of the wind tunnel test airflow, thereby completing the side sliding movement of the wind tunnel test model 1. The horizontal axis is the X-axis, the vertical axis is the Y-axis, and the axis perpendicular to the XY plane is the Z-axis. The pitching motion mechanism 4 is configured to allow the wind tunnel test model 1 to rotate around the Z-axis under the action of the wind tunnel test airflow, thereby completing the pitching movement of the wind tunnel test model 1. The wind tunnel measurement balance 3 is configured to measure the forces and moments in the rolling, side sliding and pitching movements of the wind tunnel test model 1.

[0049] The cross section of the support device 5 is wedge-shaped, and the support device 5 is swept back as a whole to form a certain angle with the wind tunnel test model 1 .

[0050] The specific structures of the pitch motion mechanism 4, the sideslip motion mechanism 6 and the rolling motion mechanism 7 are as follows:

[0051] See attached Figure 3 , the pitch motion mechanism 4 comprises: a pitch connecting shaft 10, a pitch bearing 26, a pitch jacket 9, a pitch angle encoder 11 and a brake assembly;

[0052] The axis of the pitch connection shaft 10 is arranged along the Z axis; there is a pitch bearing 26 on each side of the pitch connection shaft 10, and the pitch jacket 9 is installed outside the pitch connection shaft 10 through the pitch bearing 26, that is, the outer ring of the pitch bearing 26 is fixedly connected to the pitch jacket 9, and the inner ring of the pitch bearing 26 is fixedly connected to the pitch connection shaft 10, and the pitch connection shaft 10 and the pitch jacket 9 can rotate relative to each other through the pitch bearing 26; wherein, the upper part of the pitch jacket 9 is fixedly connected to the supporting device 5, and the outer circumferential surface of the pitch connection shaft 10 is fixedly connected to the end of the wind tunnel measurement balance 3. When the pitch jacket 9 is fixed with the support device 5, under the action of the wind tunnel test airflow, the fixed integral structure composed of the wind tunnel test model 1, the wind tunnel measurement balance 3 and the pitch connection shaft 10 can rotate around the axis direction of the pitch connection shaft 10, that is, around the Z axis, to complete the pitch movement of the wind tunnel test model 1. During this process, a gap is left between the support device 5 and the inner surface of the through groove of the wind tunnel test model 1, and the wind tunnel test model 1 will not interfere with the support device 5 when it is controlled to perform pitch movement;

[0053] The pitch angle encoder 11 is installed between the pitch connection shaft 10 and the pitch jacket 9, and is used to measure the relative rotation angle between the pitch connection shaft 10 and the pitch jacket 9, thereby obtaining the rotation angle of the pitch motion of the wind tunnel test model 1;

[0054] The brake assembly comprises: a compressed air source, a brake cylinder 14, a return spring 15 and a brake rod 13;

[0055] The outer circumferential surface of the pitch connection shaft 10 is processed with a U-shaped braking groove 12, the longitudinal direction of the U-shaped braking groove 12 is arranged along the circumferential direction of the pitch connection shaft 10, and the transverse direction of the U-shaped braking groove 12 is arranged along the axial direction of the pitch connection shaft 10; the cross section of the U-shaped braking groove 12 is a trapezoid, the longitudinal two side surfaces of the U-shaped braking groove 12 are braking surfaces, and the transverse two side surfaces of the braking groove 12 are protective surfaces;

[0056] The brake cylinder 14 is integrally connected to the lower end surface of the support device 5, and the rear end head of the brake rod 13 is fixed in the brake cylinder 14 through the return spring 15. The brake rod 13 can slide along the brake cylinder 14, and the front end head of the brake rod 13 is a trapezoidal friction head;

[0057] Initially, the return spring 15 is at its original length, and the brake rod 13 is retracted into the brake cylinder 14; when the pitch motion mechanism 4 has a braking demand, the compressed gas source fills the compressed gas into the brake cylinder 14, and the compressed gas in the brake cylinder 14 pushes the brake rod 13 to overcome the pulling force of the return spring 15 and then extend, and the front end of the brake rod 13 contacts the brake groove 12 until the trapezoidal friction head of the brake rod 13 contacts the brake surface of the brake groove 12 to form a sliding friction pair, and the friction between the two forms a rotation brake on the pitch connection shaft 10, that is, the pitch connection shaft 10 cannot rotate, and the pitch of the wind tunnel test model 1 is The rotation channel is closed; when the pitch motion mechanism 4 has no braking demand, the compressed gas in the brake cylinder 14 is discharged, and the brake rod 13 will return to the initial position under the pull of the return spring 15, and the brake rod 13 will be out of contact with the brake groove 12, and the brake is released. The pitch rotation channel of the high-speed wind tunnel test model 1 is opened, and the overall structure composed of the wind tunnel test model 1, the wind tunnel measurement balance 3 and the pitch connecting shaft 10 can rotate around the axial direction of the pitch connecting shaft 10 to complete the pitch movement of the wind tunnel test model 1; in this embodiment, the brake assembly and the wind tunnel measurement balance 3 are respectively located on two opposite sides of the pitch connecting shaft 10.

[0058] See attached Figure 4 The side-slip motion mechanism 6 includes: a side-slip jacket 16, a side-slip angle encoder 17, a side-slip bearing 18, a side-slip electric clutch 19 and a side-slip connecting shaft 20;

[0059] The axis of the side-sliding connecting shaft 20 is arranged along the Y axis, and the side-sliding connecting shaft 20 is fixedly connected to the upper end surface of the supporting device 5; the top of the side-sliding jacket 16 is connected to the rolling motion mechanism 7, and the side-sliding jacket 16 is the connecting component B; and the bottom of the side-sliding jacket 16 is installed on the outside of the side-sliding connecting shaft 20 through the side-sliding bearing 18, and the side-sliding jacket 16 and the side-sliding connecting shaft 20 can rotate relative to each other through the side-sliding bearing 18; the side-sliding electric clutch 19 is installed on the outside of the side-sliding connecting shaft 20, one end of the side-sliding electric clutch 19 is fixedly connected to the side-sliding connecting shaft 20, and the other end of the side-sliding electric clutch 19 is fixedly connected to the side-sliding jacket 16; the side-sliding electric clutch 19 is used to control the opening and closing of the side-sliding channel of the wind tunnel test model 1, specifically:

[0060] When the side-slip electric clutch 19 is closed, the two ends of the side-slip electric clutch 19 are in a separated state. At this time, the side-slip jacket 16 and the side-slip connecting shaft 20 can rotate relative to each other. When the pitch rotation channel of the wind tunnel test model 1 is closed, the side-slip connecting shaft 20, the supporting device 5, the pitch connecting shaft 10, the wind tunnel measurement balance 3 and the wind tunnel test model 1 form a fixed overall structure. The side-slip connecting shaft 20 rotates around the Y axis, synchronously driving the wind tunnel test model 1 to rotate around the Y axis to complete the side-slip movement of the wind tunnel test model 1. When the pitch rotation channel of the model 1 is opened, the side-slip connection shaft 20, the supporting device 5, the pitch motion mechanism 4 (the pitch connection shaft 10 and the pitch jacket 9 can rotate relative to each other), the wind tunnel measurement balance 3 and the wind tunnel test model 1 form an overall structure in which the wind tunnel test model 1 can undergo pitch motion, and the side-slip connection shaft 20 rotates around the Y axis, synchronously driving the wind tunnel test model 1 to rotate around the Y axis, thereby completing the side-slip + pitch motion of the wind tunnel test model 1; therefore, when the side-slip electric clutch 19 is closed, the side-slip channel of the wind tunnel test model 1 is opened;

[0061] When the side-slip electric clutch 19 is opened, both ends of the side-slip electric clutch 19 are in a connected state. At this time, the side-slip jacket 16 and the side-slip connecting shaft 20 are locked into an integrated structure, and the two cannot rotate relative to each other, thereby closing the side-slip channel of the wind tunnel test model 1.

[0062] The sideslip angle encoder 17 is installed between the sideslip jacket 16 and the sideslip connecting shaft 20 to measure the relative rotation angle between the sideslip jacket 16 and the sideslip connecting shaft 20 , thereby obtaining the rotation angle of the sideslip motion of the wind tunnel test model 1 .

[0063] See attached Figure 5 The rolling motion mechanism 7 includes: a rolling electric clutch 21, a rolling bearing 22, a rolling angle encoder 23, a rolling sleeve 24 and a rolling connecting shaft 25;

[0064] The roll connection shaft 25 is an L-shaped rod, the vertical part of the L-shaped rod is arranged along the vertical axis and fixedly connected to the mounting plate 8, and the horizontal part of the L-shaped rod is arranged along the X-axis; the roll connection shaft 25 is the connecting component A; the outer circumferential surface of the roll jacket 24 is fixedly connected to the top of the side sliding jacket 16; and the roll jacket 24 is installed on the outside of the horizontal part of the roll connection shaft 25 through the roll bearing 22, and the roll jacket 24 and the horizontal part of the roll connection shaft 25 can rotate relative to each other through the roll bearing 22; the roll electric clutch 21 is installed on the outside of the horizontal part of the roll connection shaft 25, one end of the roll electric clutch 21 is fixedly connected to the horizontal part of the roll connection shaft 25, and the other end of the roll electric clutch 21 is fixedly connected to the roll jacket 24; the roll electric clutch 21 is used to control the opening and closing of the roll channel of the wind tunnel test model 1, specifically:

[0065] When the roll electric clutch 21 is closed, the two ends of the roll electric clutch 21 are in a separated state. At this time, the horizontal parts of the roll jacket 24 and the roll connecting shaft 25 can rotate relative to each other. When the pitch rotation channel and the side sliding channel of the wind tunnel test model 1 are closed, the roll jacket 24, the side sliding jacket 16, the side sliding connecting shaft 20, the supporting device 5, the pitch connecting shaft 10, the wind tunnel measurement balance 3 and the wind tunnel test model 1 form a fixed overall structure. The roll jacket 24 rotates around the X-axis, synchronously driving the wind tunnel test model 1 to rotate around the X-axis to complete the roll motion of the wind tunnel test model 1; when the pitch rotation channel and the side sliding channel of the wind tunnel test model 1 are opened, the roll jacket 24, the side sliding motion mechanism 6 (the side sliding connecting shaft 20 and the side sliding jacket 16 can rotate relative to each other), the supporting device 5, the pitch motion mechanism 10, the wind tunnel measurement balance 3 and the wind tunnel test model 1 The dynamic mechanism 4 (the pitch connecting shaft 10 and the pitch jacket 9 can rotate relative to each other), the wind tunnel measurement balance 3 and the wind tunnel test model 1 constitute an overall structure in which the wind tunnel test model 1 can undergo pitch + sideslip motion. The rolling jacket 24 rotates around the X-axis, synchronously driving the wind tunnel test model 1 to rotate around the X-axis, completing the roll + sideslip + pitch motion of the wind tunnel test model 1; similarly, when the pitch rotation channel of the wind tunnel test model 1 is closed and the sideslip channel is opened, or the pitch rotation channel of the wind tunnel test model 1 is opened and the sideslip channel is closed, the rolling jacket 24 rotates around the X-axis, synchronously driving the wind tunnel test model 1 to rotate around the X-axis, completing the roll + sideslip motion of the wind tunnel test model 1 or the roll + pitch motion of the wind tunnel test model 1; therefore, when the roll electric clutch 21 is closed, the roll channel of the wind tunnel test model 1 is opened;

[0066] When the rolling electric clutch 21 is opened, both ends of the rolling electric clutch 21 are in a connected state. At this time, the rolling jacket 24 and the horizontal part of the rolling connecting shaft 25 are locked into an integral structure, and the two cannot rotate relative to each other, thereby closing the rolling channel of the wind tunnel test model 1.

[0067] The roll angle encoder 23 is installed between the roll jacket 24 and the horizontal part of the roll connection shaft 25 to measure the relative rotation angle between the roll jacket 24 and the horizontal part of the roll connection shaft 25, thereby obtaining the rotation angle of the roll motion of the wind tunnel test model 1.

[0068] The above three sets of rotational motion mechanisms (i.e., the pitch motion mechanism 4, the sideslip motion mechanism 6, and the rolling motion mechanism 7) can work individually or in combination, and can realize individual pitch motion control, individual sideslip motion control and individual rolling motion control, pitch + sideslip motion control, pitch + roll motion control, sideslip + roll motion control and pitch + sideslip + roll motion control, meeting the needs of high-speed wind tunnel multi-degree-of-freedom simulation flight tests.

[0069] Workflow:

[0070] The following takes pitch motion as an example to illustrate the implementation of the single degree of freedom control mode:

[0071] like Figure 1 , Figure 2 As shown, when only the pitch channel movement is to be opened, the side sliding motion channel and the rolling motion channel are closed, the wind tunnel test model 1 is fixed in the wind tunnel test section in a preset posture through the mounting plate 8, the side sliding electric clutch 19 is started, the side sliding electric clutch 19 locks the side sliding jacket 16 and the side sliding connecting shaft 20, and the side sliding channel of the wind tunnel test model 1 is closed. The rolling electric clutch 21 is started, the rolling electric clutch 21 locks the horizontal part of the rolling jacket 24 and the rolling connecting shaft 25, and the rolling channel of the wind tunnel test model 1 is closed. After the side sliding motion channel and the rolling motion channel are closed, compressed gas is passed to the upper part of the brake cylinder 14, and the compressed gas is filled into the brake cylinder 14. The compressed gas in the brake cylinder 14 will push the brake rod 13 to overcome the pulling force of the return spring 15 and then extend, and the front end of the brake rod 13 contacts the brake groove 12 to form a brake, and the pitch rotation channel of the high-speed wind tunnel test model 1 is closed.

[0072] The wind tunnel is started, and after the wind tunnel flow field is established, the compressed gas in the brake cylinder 14 is discharged, and the brake rod 13 returns to the initial position under the pull of the return spring 15, the brake rod 13 is disengaged from the brake groove 12, the brake is released, and the pitch rotation channel of the high-speed wind tunnel test model 1 is opened. The wind tunnel test model 1 rotates along the axis of the pitch connection shaft 10 of the pitch motion mechanism 4 under the action of high-speed airflow, the pitch angle encoder 11 measures the rotation angle in real time and feeds back to the wind tunnel data acquisition system, the wind tunnel measurement balance 3 measures the aerodynamic force / torque data of the wind tunnel test model 1 in real time and feeds back to the wind tunnel data acquisition system, the wind tunnel data acquisition system sends the data to the wind tunnel flight control system, the wind tunnel flight control system solves and sends the motion command to the wind tunnel test model 1 according to the control rate, the wind tunnel test model 1 is controlled to simulate flight, and after completing the established test objectives, compressed gas is filled into the brake cylinder 14, the compressed gas in the brake cylinder 14 will push the brake rod 13 to overcome the pulling force of the return spring 15 and then extend, the front end of the brake rod 13 contacts the brake groove 12, forming a brake, closing the pitch rotation channel of the high-speed wind tunnel test model 1, the wind tunnel is shut down, and the test is ended.

[0073] The following takes pitch+side slip+roll motion control as an example to illustrate the implementation method of the multi-degree-of-freedom control mode.

[0074] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, the wind tunnel test model 1 is first fixed in the wind tunnel test section in a preset posture through the mounting plate 8, and the side sliding electric clutch 19 is started. The side sliding electric clutch 19 locks the side sliding jacket 16 and the side sliding connecting shaft 20, and the side sliding channel of the wind tunnel test model 1 is closed. The rolling electric clutch 21 is started. The rolling electric clutch 21 locks the rolling jacket 24 and the horizontal part of the rolling connecting shaft 25, and the rolling channel of the wind tunnel test model 1 is closed. Compressed gas is passed to the upper part of the brake cylinder 14, and the compressed gas is filled into the brake cylinder 14. The compressed gas in the brake cylinder 14 will push the brake rod 13 to overcome the pulling force of the return spring 15 and then extend. The front end of the brake rod 13 contacts the brake groove 12, forming a brake, and the pitch rotation channel of the high-speed wind tunnel test model 1 is closed.

[0075] The wind tunnel is started. After the wind tunnel test airflow is established, the compressed gas in the brake cylinder 14 is discharged. The brake rod 13 will return to the initial position under the pull of the return spring 15. The brake rod 13 is disengaged from the brake groove 12, the brake is released, and the pitch rotation channel of the wind tunnel test model 1 is opened. The side slip electric clutch 19 is closed. The side slip electric clutch 19 separates the side slip jacket 16 from the side slip connecting shaft 20, and the side slip channel of the wind tunnel test model 1 is opened. The roll electric clutch 21 is closed. The roll electric clutch 21 separates the roll jacket 24 from the horizontal part of the roll connecting shaft 25, and the roll channel of the wind tunnel test model 1 is opened.

[0076] The pitch angle encoder 11 measures the pitch rotation angle of the wind tunnel test model 1 in real time, the sideslip angle encoder 17 measures the sideslip rotation angle of the wind tunnel test model 1 in real time, and the roll angle encoder 23 measures the roll rotation angle of the wind tunnel test model 1 in real time, and feeds back to the wind tunnel data acquisition system. The wind tunnel measurement balance 3 measures the aerodynamic force / torque data of the wind tunnel test model 1 in real time and feeds back to the wind tunnel data acquisition system. The wind tunnel data acquisition system sends the data to the wind tunnel flight control system. The wind tunnel flight control system solves and sends motion instructions to the wind tunnel test model 1 according to the control rate, and the wind tunnel test model 1 is controlled to simulate flight.

[0077] After the established test target is completed, the compressed gas is filled into the brake cylinder 14. The compressed gas in the brake cylinder 14 will push the brake rod 13 to overcome the pulling force of the return spring 15 and then extend. The front end of the brake rod 13 contacts the brake groove 12 to form a brake, close the pitch rotation channel of the high-speed wind tunnel test model 1, and start the side slip electric clutch 19 to close the side slip channel of the high-speed wind tunnel test model 1. Start the rolling electric clutch 21 to close the rolling channel of the high-speed wind tunnel test model 1. The wind tunnel is closed and the test is completed.

[0078] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0079] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0080] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-degree-of-freedom control and measurement system for high-speed wind tunnel testing, characterized in that: include: Pitch motion mechanism, support device, side-slip motion mechanism, roll motion mechanism and mounting plate; The peripheral equipment includes: a wind tunnel test model and a wind tunnel measurement balance; a through groove is processed in the middle of the wind tunnel test model; The mounting plate is fixed in the wind tunnel test section; the rolling motion mechanism is connected to the mounting plate through a connecting component A, the side-slip motion mechanism is connected to the rolling motion mechanism through a connecting component B, one end of the supporting device is connected to the side-slip motion mechanism, and the other end of the supporting device is connected to the pitching motion mechanism; and the supporting device passes through the through slot of the wind tunnel test model; one end of the wind tunnel measurement balance is fixedly connected to the inside of the wind tunnel test model, and the other end is connected to the pitching motion mechanism; wherein the rolling motion mechanism is used to allow the wind tunnel test model to rotate around the horizontal axis under the action of the wind tunnel test airflow, thereby completing the rolling motion of the wind tunnel test model, the side-slip motion mechanism is used to allow the wind tunnel test model to rotate around the vertical axis under the action of the wind tunnel test airflow, thereby completing the side-slip motion of the wind tunnel test model, let the horizontal axis be the X-axis, the vertical axis be the Y-axis, then the axis perpendicular to the XY plane is the Z-axis, and the pitching motion mechanism is used to allow the wind tunnel test model to rotate around the Z-axis under the action of the wind tunnel test airflow, thereby completing the pitching motion of the wind tunnel test model.

2. A multi-degree-of-freedom control and measurement system for high-speed wind tunnel testing as claimed in claim 1, characterized in that: The pitch motion mechanism comprises: a pitch connecting shaft, a pitch clamping sleeve, a pitch angle encoder and a brake assembly; The axis of the pitch connection shaft is arranged along the Z axis; the pitch jacket is installed on the outside of the pitch connection shaft through the pitch bearing, and the pitch connection shaft and the pitch jacket rotate relative to each other through the pitch bearing; wherein the upper part of the pitch jacket is fixedly connected to the support device, and the outer circumferential surface of the pitch connection shaft is fixedly connected to the end of the wind tunnel measurement balance, and when the pitch jacket is kept fixed with the support device, under the action of the wind tunnel flow field, the fixed integral structure composed of the wind tunnel test model, the wind tunnel measurement balance and the pitch connection shaft can rotate around the axis direction of the pitch connection shaft, that is, rotate around the Z axis, to complete the pitch movement of the wind tunnel test model; The pitch angle encoder is installed between the pitch connection shaft and the pitch jacket, and is used to measure the relative rotation angle between the pitch connection shaft and the pitch jacket, thereby obtaining the rotation angle of the pitch motion of the wind tunnel test model; The brake assembly is used to brake the rotation of the pitch connection shaft, thereby controlling the opening and closing of the pitch rotation channel of the wind tunnel test model.

3. A multi-degree-of-freedom control and measurement system for high-speed wind tunnel testing as claimed in claim 2, characterized in that: A gap is left between the support device and the inner surface of the through slot of the wind tunnel test model, so that the wind tunnel test model will not interfere with the support device when being controlled to perform pitching motion.

4. A multi-degree-of-freedom control and measurement system for high-speed wind tunnel testing as claimed in claim 2, characterized in that: The brake assembly comprises: a compressed air source, a brake cylinder, a return spring and a brake rod; The outer circumferential surface of the pitch connection shaft is processed with a U-shaped braking groove, the longitudinal direction of the U-shaped braking groove is arranged along the circumferential direction of the pitch connection shaft, and the transverse direction of the U-shaped braking groove is arranged along the axial direction of the pitch connection shaft; the cross section of the U-shaped braking groove is a trapezoid, the longitudinal two side surfaces of the U-shaped braking groove are braking surfaces, and the transverse two side surfaces of the braking groove are protective surfaces; The brake cylinder is integrally connected to the lower end surface of the support device, the rear end head of the brake rod is fixed in the brake cylinder through a return spring, the brake rod can slide along the brake cylinder, and the front end head of the brake rod is a trapezoidal friction head; Initially, the return spring is at its original length, and the brake rod is retracted into the brake cylinder; when the pitch motion mechanism has a braking demand, the compressed gas source fills the compressed gas into the brake cylinder, and the compressed gas in the brake cylinder pushes the brake rod to overcome the pulling force of the return spring and then extend, and the front end of the brake rod contacts the brake groove, and the trapezoidal friction head of the brake rod cooperates with the braking surface of the brake groove to form a sliding friction pair, and the friction between the two forms a rotation brake on the pitch connection shaft, that is, the pitch connection shaft cannot rotate, and the pitch rotation channel of the wind tunnel test model is closed; when the pitch motion mechanism has no braking demand, the compressed gas in the brake cylinder is discharged, and the brake rod will return to the initial position under the pull of the return spring, and the brake rod will be out of contact with the brake groove, the brake is released, and the pitch rotation channel of the high-speed wind tunnel test model is opened, and the overall structure composed of the wind tunnel test model, the wind tunnel measurement balance and the pitch connection shaft can rotate around the axis direction of the pitch connection shaft to complete the pitch motion of the wind tunnel test model.

5. A multi-degree-of-freedom control and measurement system for high-speed wind tunnel testing as claimed in claim 2, characterized in that: The side-slip motion mechanism comprises: a side-slip jacket, a side-slip angle encoder, a side-slip electric clutch and a side-slip connecting shaft; The axis of the side-slip connecting shaft is arranged along the Y axis, and the side-slip connecting shaft is fixedly connected to the upper end surface of the supporting device; the top of the side-slip jacket is connected to the rolling motion mechanism, and the side-slip jacket is the connecting component B; and the bottom of the side-slip jacket is installed on the outside of the side-slip connecting shaft through the side-slip bearing, and the side-slip jacket and the side-slip connecting shaft rotate relative to each other through the side-slip bearing; the side-slip electric clutch is installed on the outside of the side-slip connecting shaft, one end of the side-slip electric clutch is fixedly connected to the side-slip connecting shaft, and the other end of the side-slip electric clutch is fixedly connected to the side-slip jacket; the side-slip electric clutch is used to control the opening and closing of the side-slip channel of the wind tunnel test model; The sideslip angle encoder is installed between the sideslip jacket and the sideslip connecting shaft, and is used to measure the relative rotation angle between the sideslip jacket and the sideslip connecting shaft, thereby obtaining the rotation angle of the sideslip motion of the wind tunnel test model.

6. A multi-degree-of-freedom control and measurement system for high-speed wind tunnel testing as claimed in claim 5, characterized in that: When the sideslip electric clutch is closed, the two ends of the sideslip electric clutch are in a separated state, and the sideslip jacket and the sideslip connecting shaft can rotate relative to each other. When the pitch rotation channel of the wind tunnel test model is closed, the sideslip connecting shaft, the supporting device, the pitch connecting shaft, the wind tunnel measurement balance and the wind tunnel test model form a fixed overall structure, and the sideslip connecting shaft rotates around the Y axis, synchronously driving the wind tunnel test model to rotate around the Y axis to complete the sideslip motion of the wind tunnel test model; when the pitch rotation channel of the wind tunnel test model is opened, the sideslip connecting shaft, the supporting device, the pitch motion mechanism, the wind tunnel measurement balance and the wind tunnel test model form an overall structure in which the wind tunnel test model can undergo pitch motion, and the sideslip connecting shaft rotates around the Y axis, synchronously driving the wind tunnel test model to rotate around the Y axis to complete the sideslip + pitch motion of the wind tunnel test model; therefore, when the sideslip electric clutch is closed, the sideslip channel of the wind tunnel test model is opened; When the side-slip electric clutch is opened, both ends of the side-slip electric clutch are in a connected state, the side-slip jacket and the side-slip connecting shaft are locked into an integrated structure, and the two cannot rotate relative to each other, thereby closing the side-slip channel of the wind tunnel test model.

7. A multi-degree-of-freedom control and measurement system for high-speed wind tunnel testing as claimed in claim 5, characterized in that: The rolling motion mechanism comprises: a rolling electric clutch, a rolling bearing, a rolling angle encoder, a rolling sleeve and a rolling connecting shaft; The roll connection shaft is an L-shaped rod, the vertical part of the L-shaped rod is arranged along the vertical axis and fixedly connected to the mounting plate, and the horizontal part of the L-shaped rod is arranged along the X-axis; the roll connection shaft is the connecting component A; the outer circumferential surface of the roll jacket is fixedly connected to the top of the side sliding jacket; and the roll jacket is installed on the outside of the horizontal part of the roll connection shaft through a roll bearing, and the roll jacket and the horizontal part of the roll connection shaft rotate relative to each other through the roll bearing; the roll electric clutch is installed on the outside of the horizontal part of the roll connection shaft, one end of the roll electric clutch is fixedly connected to the horizontal part of the roll connection shaft, and the other end of the roll electric clutch is fixedly connected to the roll jacket; the roll electric clutch is used to control the opening and closing of the roll channel of the wind tunnel test model; The roll angle encoder is installed between the roll jacket and the horizontal part of the roll connection shaft, and is used to measure the relative rotation angle between the roll jacket and the horizontal part of the roll connection shaft, thereby obtaining the rotation angle of the roll motion of the wind tunnel test model.

8. A multi-degree-of-freedom control and measurement system for high-speed wind tunnel testing as claimed in claim 7, characterized in that: When the roll electric clutch is closed, the two ends of the roll electric clutch are in a separated state, and the horizontal parts of the roll jacket and the roll connecting shaft can rotate relative to each other. When the pitch rotation channel and the sideslip channel of the wind tunnel test model are closed, the roll jacket, the sideslip jacket, the sideslip connecting shaft, the supporting device, the pitch connecting shaft, the wind tunnel measurement balance and the wind tunnel test model form a fixed overall structure, and the roll jacket rotates around the X-axis, synchronously driving the wind tunnel test model to rotate around the X-axis to complete the roll motion of the wind tunnel test model; when the pitch rotation channel and the sideslip channel of the wind tunnel test model are opened, the roll jacket, the sideslip motion mechanism, the supporting device, the pitch motion mechanism, the wind tunnel The measuring balance and the wind tunnel test model constitute an overall structure of the wind tunnel test model that can undergo pitch + sideslip motion. The rolling jacket rotates around the X-axis, synchronously driving the wind tunnel test model to rotate around the X-axis, completing the roll + sideslip + pitch motion of the wind tunnel test model; when the pitch rotation channel of the wind tunnel test model is closed and the sideslip channel is opened, or the pitch rotation channel of the wind tunnel test model is opened and the sideslip channel is closed, the rolling jacket rotates around the X-axis, synchronously driving the wind tunnel test model to rotate around the X-axis, completing the roll + sideslip motion of the wind tunnel test model or the roll + pitch motion of the wind tunnel test model; therefore, when the roll electric clutch is closed, the roll channel of the wind tunnel test model is opened; When the rolling electric clutch is opened, the two ends of the rolling electric clutch are in a connected state, the rolling jacket and the horizontal part of the rolling connecting shaft are locked into an integrated structure, and the two cannot rotate relative to each other, thereby closing the rolling channel of the wind tunnel test model.

9. A multi-degree-of-freedom control and measurement system for high-speed wind tunnel testing according to any one of claims 1 to 8, characterized in that: The cross section of the support device is in a wedge shape, and the support device is overall swept back to form a preset angle with the wind tunnel test model.

Images