Water entry impact experiment system for research of vehicle flying with attack angle and sideslip angle

Abstract

The present application relates to the technical field of water entry impact experiment system, and discloses a water entry impact experiment system for researching the water entry impact of a navigation body flying with an attack angle and a sideslip angle, which comprises a photography subsystem, a crown block subsystem, a water tank subsystem and a launching subsystem; the photography subsystem is located outside the water tank subsystem; the launching subsystem comprises a cylinder slide rail angle adjusting tilting table, a cylinder slide rail, a cylinder slide block, a multi-degree-of-freedom mechanical arm, a pneumatic clamp and an experimental projectile; the water tank subsystem is provided with a photoelectric switch which is inductively matched with the cylinder slide block.In the present application, the cylinder slide block is responsible for accelerating and restricting the degree of freedom of movement to control the speed direction, the mechanical arm and the pneumatic clamp are responsible for controlling the attack angle and the sideslip angle, and when the cylinder slide block is used in cooperation with the photoelectric switch, the release time and position of the pneumatic clamp can be conveniently and accurately controlled, and at the same time, the photography subsystem can be started to take photographs at the optimal time point, so that the present application is suitable for carrying out the experimental research on the water entry impact of the navigation body flying with the attack angle and the sideslip angle.

Description

Technical Field

[0001] This invention relates to the field of water impact test system technology, and more specifically, to a water impact test system for studying aircraft flying with angle of attack and sideslip angle. Background Technology

[0002] The phenomenon of water entry impact is frequently studied in the fields of ships, cross-medium aircraft, and underwater weapons. During water entry, a vehicle often experiences tremendous impact forces, which can lead to severe yaw, structural damage, internal component failure, and even casualties. Therefore, in-depth research into water entry impact is crucial.

[0003] Existing water impact test systems mainly use rails or light air cannons as acceleration devices. These devices rely on gravity or high-pressure gas for acceleration, using the rail's track or the cannon's nozzle to constrain the degrees of freedom and control the direction of the flight speed. The rail or cannon is placed on an adjustable-angle ramp, aligned with the center of the water tank. A high-speed camera is activated simultaneously with the release or launch of the object to be tested (such as a projectile) to record the water impact process.

[0004] However, while the orbital or nozzle constrains the degrees of freedom of motion to control the direction of flight velocity, it also constrains the attitude of the object being tested entering the water. For example, when a cylindrical projectile is accelerated using a rail or a light gas cannon, its own axis must be parallel to the axis of the rail or nozzle, resulting in zero angle of attack and sideslip angle. Therefore, existing water impact test systems of this type are only suitable for water impact tests on vehicles flying without angle of attack and sideslip angle. In reality, however, the vehicle may already have angle of attack and sideslip angle during its flight before entering the water, and these angles of attack and sideslip angle have a significant impact on the water impact process, making them one of the research focuses in this field.

[0005] Therefore, in order to address the above-mentioned shortcomings, it is necessary to develop a water impact test system suitable for studying aircraft flying with angle of attack and sideslip angle, and also convenient for adjusting the size of the flight angle of attack and sideslip angle in each group of experiments. Summary of the Invention

[0006] In view of this, the present invention proposes an experimental system for studying the water impact of a vehicle flying with angle of attack and sideslip angle, the specific technical solution of which is as follows:

[0007] An experimental system for studying the water impact of a vehicle flying at angle of attack and sideslip angle includes a photography subsystem, a crane subsystem, a water tank system, and a launch subsystem. The photography subsystem is located outside the water tank system, and its camera lens is aimed at the water surface inside the water tank system. The launch subsystem is mounted on the crane subsystem and is driven by the crane subsystem to move in multiple directions above the water tank system. The launch subsystem includes a cylinder slide rail tilting platform, a cylinder slide rail, and a cylinder slider. The cylinder slide rail tilting platform... The platform is installed on the overhead crane subsystem, the cylinder slide rail is installed on the cylinder slide rail angle adjustment platform, and the cylinder slide rail can adjust its angle with the horizontal plane through the cylinder slide rail angle adjustment platform; the cylinder slider is installed on the cylinder slide rail, one end of the multi-degree-of-freedom robotic arm is connected to the cylinder slider, and the other end is equipped with a pneumatic clamp that can grasp the experimental projectile; the water tank system is equipped with a photoelectric switch that senses and cooperates with the cylinder slider, and the photoelectric switch is communicatively connected to the pneumatic clamp and the photography subsystem.

[0008] Preferably, multiple pneumatic grippers are provided, and each pneumatic gripper is connected to the cylinder slider through a corresponding connector. These connectors replace the multi-degree-of-freedom robotic arm, and the shapes of the multiple connectors are different, so that they can replace the multi-degree-of-freedom robotic arm to present different posture adjustment effects.

[0009] Preferably, the cylinder slide rail tilting platform includes a first platform and a second platform hinged together. The outer wall of the first platform is fixedly connected to the overhead crane subsystem, and the outer wall of the second platform is fixedly connected to the cylinder slide rail. A groove is provided on the side of the first platform away from the hinge end, and a lead screw is placed in the groove. One end of the lead screw located between the first platform and the second platform is hinged to the inner wall of the second platform, and a lead screw hand crank is installed at the other end located on the outer side of the first platform. A lead screw nut that is rotatably connected to the lead screw is installed on the inner wall surface of the first platform at the position corresponding to the groove.

[0010] Preferably, the upper part of the cylinder slide rail is provided with an upper air inlet / outlet, and the lower part is provided with a lower air inlet / outlet.

[0011] Preferably, the pneumatic clamp has a pneumatic clamp vent at the top and pneumatic clamp fingers at the bottom. The experimental projectile is gripped by the pneumatic clamp fingers, and interference with the movement of the experimental projectile must be avoided at the moment the pneumatic clamp fingers open rapidly.

[0012] Preferably, the multi-degree-of-freedom robotic arm includes a torsion motor mounted on the cylinder slider, the torsion motor being connected to a first connecting arm via a first servo motor, the first connecting arm being connected to a second connecting arm via a second servo motor, and the second connecting arm being connected to the pneumatic clamp via a third servo motor.

[0013] Preferably, the photography subsystem includes a high-speed camera and a high-speed camera leveling tripod mounted below the high-speed camera, wherein the horizon line of the high-speed camera must be flush with the water surface in the water tank system.

[0014] Preferably, the water tank system includes a water tank body made of transparent material, and a photoelectric switch is installed on each of the opposite sides of the top of the water tank body. A blackboard extends outward from the outer wall of the cylinder slider, and the opposing laser beams emitted by the two photoelectric switches can be blocked by the blackboard moved to the corresponding position.

[0015] Preferably, the overhead crane subsystem includes multiple vertical beams, two parallel transverse tracks, two parallel longitudinal tracks, and a connecting beam. The vertical beams are supported and fixed to the bottom of the transverse tracks. The two longitudinal tracks are arranged between the two transverse tracks, and the ends of the longitudinal tracks are connected to a first track wheel mechanism that rolls on the transverse tracks. The connecting beam is arranged between the two longitudinal tracks, and the ends of the connecting beam are connected to a second track wheel mechanism that rolls on the longitudinal tracks. A cylinder slide rail tilting platform is mounted on the connecting beam. Both the first track wheel mechanism and the second track wheel mechanism are driven by corresponding drive motors.

[0016] Preferably, a lead screw motor is installed on the connecting beam, and the lead screw of the lead screw motor is threadedly connected to the lead screw nut fixed on the cylinder slide rail angle adjustment platform, and the central axis of the lead screw is parallel to the transverse rail.

[0017] Compared with existing technologies, the present invention provides an experimental system for studying the water impact of a vehicle flying at angles of attack and sideslip angles, which has the following advantages:

[0018] 1. The experimental system of this invention completes the speed control and attitude control in two parts. The cylinder slider is responsible for acceleration and constraining the degrees of freedom of motion to control the speed direction, while the multi-degree-of-freedom robotic arm and pneumatic clamp are responsible for controlling the angle of attack and sideslip angle. It is suitable for conducting experimental research on the water impact of a vehicle flying with angle of attack and sideslip angle.

[0019] 2. The experimental system of this invention makes it easy to control experimental variables and change a certain variable.

[0020] 3. In the experimental system of this invention, when the cylinder slider is used in conjunction with the photoelectric switch, the release timing and position of the pneumatic clamp can be conveniently and accurately controlled, and the high-speed camera can start shooting at the optimal time.

[0021] 4. In the experimental system of the present invention, the multi-degree-of-freedom robotic arm can be simplified into a connecting part between multiple pneumatic grippers and cylinder sliders, and the effect of adjusting the posture of the multi-degree-of-freedom robotic arm can be replaced by changing the connecting parts with different shapes. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 Axonometric projection of the water impact test system for the vehicle body of this invention Figure 1 .

[0024] Figure 2 Axonometric projection of the water impact test system for the vehicle body of this invention Figure 2 .

[0025] Figure 3 This is a front view of the water impact test system for the vehicle body according to the present invention.

[0026] Figure 4 This is a schematic diagram of the transmission subsystem in this invention.

[0027] In the picture:

[0028] 10-Photography Subsystem

[0029] 11-High-speed camera; 12-High-speed camera leveling tripod;

[0030] 20-Typhoon Subsystem

[0031] 21-Upright beam, 22-Transverse track, 23-Longitudinal track, 24-Connecting beam, 25-First track wheel mechanism, 26-Second track wheel mechanism, 27-Screw motor;

[0032] 30-Water tank system,

[0033] 31-Water tank body; 32-Photoelectric switch;

[0034] 40- Launch Subsystem

[0035] 41-Cylinder slide rail tilting table, 411-Table 1, 412-Table 2, 413-Lead screw, 414-Lead screw hand crank, 415-Lead screw nut, 42-Cylinder slide rail, 421-Upper air inlet / outlet of cylinder slide rail, 422-Lower air inlet / outlet of cylinder slide rail, 43-Cylinder slider, 431-Blackboard, 44-Multi-degree-of-freedom robotic arm, 441-Torsion motor, 442-First servo motor, 443-First connecting arm, 444-Second servo motor, 445-Second connecting arm, 446-Third servo motor, 45-Pneumatic clamp, 451-Pneumatic clamp vent, 452-Pneumatic clamp finger, 46-Experimental projectile. Detailed Implementation

[0036] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0037] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] Example 1:

[0040] like Figures 1-4 As shown, the present invention provides an experimental system for studying the water impact of a vehicle flying with angle of attack and sideslip angle, comprising a photography subsystem 10, a crane subsystem 20, a water tank system 30, and a launch subsystem 40.

[0041] Specifically,

[0042] The camera subsystem 10 is located outside the water tank system 30, and its camera lens is aimed at the water surface inside the water tank system 30.

[0043] Furthermore, the water tank system 30 includes a water tank body 31, which is made of transparent material. The camera subsystem 10 includes a high-speed camera 11 and a high-speed camera leveling tripod 12 mounted below the high-speed camera 11. By adjusting the high-speed camera leveling tripod 12, the horizon line of the high-speed camera 11 must be level with the water surface inside the water tank body 31.

[0044] The launch subsystem 40 is installed on the crane subsystem 20 and is driven by the crane subsystem 20 to move in multiple directions above the water tank system 30.

[0045] Furthermore, the overhead crane subsystem 20 includes multiple vertical beams 21, two parallel transverse tracks 22, two parallel longitudinal tracks 23, and a connecting beam 24. The vertical beams 21 are supported and fixed to the bottom of the transverse tracks 22. The two longitudinal tracks 23 are arranged between the two transverse tracks 22, and the ends of the longitudinal tracks 23 are connected to the first track wheel mechanism 25 that rolls on the transverse tracks 22. The connecting beam 24 is arranged between the two longitudinal tracks 23, and the ends of the connecting beam 24 are connected to the second track wheel mechanism 26 that rolls on the longitudinal tracks 23. The cylinder slide rail tilting platform 41 is installed on the connecting beam 24. The first track wheel mechanism 25 and the second track wheel mechanism 26 are both driven to move by corresponding drive motors. The launching subsystem 40 can be driven by the first track wheel mechanism 25 to move along the transverse tracks 22 and by the second track wheel mechanism 26 to move along the longitudinal tracks 23, thereby realizing its movement in the X-axis and Y-axis directions.

[0046] Furthermore, since the distance of the transverse track 22 is relatively long, each first track wheel mechanism 25 installed on each transverse track 22 in this invention is equipped with a drive motor. Since the distance of the longitudinal track 23 is relatively short, it is sufficient to select one of the second track wheel mechanisms 26 installed on one longitudinal track 23 to be equipped with a drive motor.

[0047] The launching subsystem 40 includes a cylinder slide rail angle adjustment platform 41, a cylinder slide rail 42, and a cylinder slider 43. The cylinder slide rail angle adjustment platform 41 is installed on the connecting beam 24 of the overhead crane subsystem 20. The cylinder slide rail 42 is installed on the cylinder slide rail angle adjustment platform 41, and the cylinder slide rail 42 can adjust its angle with the horizontal plane (i.e., the water entry angle of the experimental projectile 46) through the cylinder slide rail angle adjustment platform 41. The cylinder slider 43 is installed in conjunction with the cylinder slide rail 42. One end of the multi-degree-of-freedom robotic arm 44 is connected to the cylinder slider 43, and the other end is equipped with a pneumatic clamp 45 that can grip the experimental projectile 46.

[0048] The water tank system 30 is equipped with a photoelectric switch 32 that senses and engages with the cylinder slider 43, and the photoelectric switch 32 is communicatively connected to the pneumatic clamp 45 and the imaging subsystem 10. Specifically, a photoelectric switch 32 is installed on each of the opposite sides of the top of the water tank body 31, and a blackboard 431 is fixedly extended outward from the outer wall of the cylinder slider 43. The opposing laser beams emitted by the two photoelectric switches 32 can be blocked by the blackboard 431 moved to the corresponding position, thereby transmitting signals to the pneumatic clamp 45 and the imaging subsystem 10 to perform corresponding actions.

[0049] Furthermore, a lead screw motor 27 is installed on the connecting beam 24. The lead screw in the lead screw motor 27 is threadedly connected to the lead screw nut fixed on the cylinder slide rail tilting platform 41, and the central axis of the lead screw is parallel to the transverse track 22. By controlling the lead screw motor 27, the launching subsystem 40 can move back and forth between the two longitudinal tracks 23. At the same time, in conjunction with controlling the drive motors on the first track wheel mechanism 25 and the second track wheel mechanism 26, it can be ensured that the experimental projectile 46 can accurately enter the water from the center of the water tank body 31 after the attitude is adjusted.

[0050] Furthermore, the cylinder slide rail tilting platform 41 includes a hinged platform 1 411 and a platform 2 412. The outer wall of platform 1 411 is fixedly connected to the connecting beam 24, and the outer wall of platform 2 412 is fixedly connected to the cylinder slide rail 42. A groove is provided on the side of platform 1 411 away from the hinge end, and a lead screw 413 is placed in the groove. One end of the lead screw 413 located between platform 1 411 and platform 2 412 is hinged to the inner wall of platform 2 412, and the other end located on the outside of platform 1 411 is equipped with a lead screw hand crank 414. A lead screw nut 415, which is rotatably connected to the lead screw 413, is installed on the inner wall surface of platform 1 411 at the position corresponding to the groove. By rotating the lead screw 413 with the hand crank 414, the lead screw 413 can move relative to the lead screw nut 415 along its axis, thereby adjusting the angle between the second platform 412 and the first platform 411, and thus adjusting the water entry angle of the experimental projectile 46.

[0051] Furthermore, the upper part of the cylinder slide rail 42 is provided with an upper air inlet / outlet 421, and the lower part is provided with a lower air inlet / outlet 422. By adjusting the air pressure difference between the upper and lower air inlets / outlets of the cylinder slide rail, the initial speed, moving speed, and water entry speed of the slider can be controlled.

[0052] Furthermore, the pneumatic clamp 45 has a pneumatic clamp vent 451 at the top and a pneumatic clamp finger 452 at the bottom. The experimental projectile 46 is gripped by the pneumatic clamp finger 452. At the moment when the pneumatic clamp finger 452 opens rapidly, it is necessary to avoid interfering with the movement of the experimental projectile 46. For example, the pneumatic clamp finger 452 can grip the experimental projectile 46 like chopsticks.

[0053] Furthermore, the multi-degree-of-freedom robotic arm 44 includes a torsion motor 441 mounted on a cylinder slider 43. The torsion motor 441 is connected to a first connecting arm 443 via a first servo motor 442. The first connecting arm 443 is connected to a second connecting arm 445 via a second servo motor 444. The second connecting arm 445 is connected to a pneumatic clamp 45 via a third servo motor 446. The multi-degree-of-freedom robotic arm 44, through the torsion motor 441, the first connecting arm 443, the second connecting arm 445, and the three servo motors, enables the pneumatic clamp 45 to rotate in four free dimensions, increasing the range of free rotation of the robotic arm and ensuring attitude adjustment for the experimental projectile 46.

[0054] The specific operating steps of this invention are as follows:

[0055] 1. Move and adjust the high-speed camera and level the tripod so that the camera's horizon is level with the water surface inside the tank.

[0056] 2. Adjust the angle of the cylinder slide rail tilting table to change the angle between the cylinder slide rail and the horizontal plane (determining the slide rail determines the velocity direction, which in turn determines the water entry angle);

[0057] 3. Use a pneumatic clamp to pick up the experimental projectile, and adjust the servo motor and torsion motor on the multi-degree-of-freedom robotic arm to determine the attitude of the experimental projectile. The angle between the axis of the experimental projectile and the direction of the cylinder slide rail can be used to determine its flight angle of attack and yaw angle.

[0058] 4. Adjust the air pressure difference between the upper and lower air inlets / outlets of the cylinder slide rail to control the initial velocity of the cylinder slider. Before the experiment begins, raise the cylinder slider to the highest point (i.e., the air pressure at the upper air inlet / outlet of the cylinder slide rail is lower than the air pressure at the lower air inlet / outlet of the cylinder slide rail, so that the slider is pushed to the highest point).

[0059] 5. To begin the experiment, increase the air pressure at the upper inlet / outlet of the cylinder slide rail while decreasing the air pressure at the lower inlet / outlet of the cylinder slide rail, causing the cylinder slider to move downwards towards the cylinder slide rail at an accelerated speed.

[0060] 6. When the cylinder slider descends to a certain mark, the photoelectric switch's laser beam is blocked by the blackboard, causing the pneumatic clamp to stop supplying air. The pneumatic clamp fingers quickly open due to spring return force. Because the release point is close to the water tank (otherwise, the trajectory would be uneven due to gravity), the experimental projectile will enter the water with its pre-release velocity. Simultaneously, the photoelectric switch will activate the high-speed camera to begin recording, ensuring the high-speed camera starts recording at the optimal time.

[0061] 7. After the pneumatic clamp releases the experimental projectile, the cylinder slider continues to descend. Since the exhaust stops at the bottom of the cylinder slide rail, the air pressure at the air inlet under the cylinder slide rail increases when the cylinder slider quickly reaches the bottom, thus completing the buffering.

[0062] Example 2:

[0063] In another embodiment of the present invention, a plurality of pneumatic grippers 45 are provided, and each pneumatic gripper 45 is connected to the cylinder slider 43 by a corresponding connector. These connectors replace the multi-degree-of-freedom robotic arm 44, and the shapes of the multiple connectors are different, so that the replacement of the multi-degree-of-freedom robotic arm 44 presents different posture adjustment effects.

[0064] In other words, in this invention, a multi-degree-of-freedom robotic arm can be simplified into a connector between multiple pneumatic grippers and cylinder sliders, and the effect of adjusting the posture of the multi-degree-of-freedom robotic arm can be replaced by replacing connectors with different shapes.

[0065] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0066] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A water impact test system for studying a vehicle flying at angle of attack and sideslip angle, characterized in that, The system includes a photography subsystem, a crane subsystem, a water tank system, and a launching subsystem. The photography subsystem is located outside the water tank system, with its camera lens aimed at the water surface inside the water tank system. The launching subsystem is mounted on the crane subsystem and is driven by the crane subsystem to move in multiple directions above the water tank system. The launching subsystem includes a cylinder rail angle adjustment platform, a cylinder rail, and a cylinder slider. The cylinder rail angle adjustment platform is mounted on the crane subsystem, and the cylinder rail is mounted on the cylinder rail angle adjustment platform. The cylinder rail can adjust its angle with the horizontal plane through the cylinder rail angle adjustment platform. The cylinder slider is fitted onto the cylinder rail. One end of a multi-degree-of-freedom robotic arm is connected to the cylinder slider, and the other end is fitted with a pneumatic clamp capable of gripping experimental projectiles. The water tank system is equipped with a photoelectric switch that senses and engages with the cylinder slider, and the photoelectric switch is communicatively connected to the pneumatic clamp and the photography subsystem. The multi-degree-of-freedom robotic arm includes a torsion motor mounted on the cylinder slider. The torsion motor is connected to a first connecting arm via a first servo motor. The first connecting arm is connected to a second connecting arm via a second servo motor. The second connecting arm is connected to the pneumatic clamp via a third servo motor. The overhead crane subsystem includes multiple vertical beams, two parallel transverse rails, two parallel longitudinal rails, and a connecting beam. The vertical beams are supported and fixed to the bottom of the transverse rails. The two longitudinal rails are positioned between the two transverse rails, and the ends of the longitudinal rails are connected to a first track wheel mechanism that rolls on the transverse rails. The connecting beam is positioned between the two longitudinal rails, and the ends of the connecting beam are connected to a second track wheel mechanism that rolls on the longitudinal rails. A cylinder slide rail tilting platform is mounted on the connecting beam. Both the first track wheel mechanism and the second track wheel mechanism are driven by corresponding drive motors. A lead screw motor is installed on the connecting beam. The lead screw in the lead screw motor is threadedly connected to the lead screw nut fixed on the cylinder slide rail angle adjustment platform, and the central axis of the lead screw is parallel to the transverse rail.

2. The water impact test system for studying a vehicle flying with angle of attack and sideslip angle as described in claim 1, characterized in that, Multiple pneumatic grippers are provided, and each pneumatic gripper is connected to the cylinder slider through a corresponding connector. These connectors replace the multi-degree-of-freedom robotic arm, and the shapes of the multiple connectors are different, so that they can replace the multi-degree-of-freedom robotic arm to present different posture adjustment effects.

3. The experimental system for studying the water impact of a vehicle during flight with angle of attack and sideslip angle, as described in claim 1 or 2, is characterized in that... The cylinder slide rail tilting platform includes a hinged platform 1 and a platform 2. The outer wall of platform 1 is fixedly connected to the overhead crane subsystem, and the outer wall of platform 2 is fixedly connected to the cylinder slide rail. A groove is provided on the side of platform 1 away from the hinge end, and a lead screw is placed in the groove. One end of the lead screw located between platform 1 and platform 2 is hinged to the inner wall of platform 2, and the other end located on the outer side of platform 1 is equipped with a lead screw hand crank. A lead screw nut that is rotatably connected to the lead screw is installed on the inner wall surface of platform 1 at the position corresponding to the groove.

4. The experimental system for studying the water impact of a vehicle during flight with angle of attack and sideslip angle, as described in claim 1 or 2, is characterized in that... The upper part of the cylinder slide rail is provided with an upper air inlet / outlet, and the lower part is provided with a lower air inlet / outlet.

5. The experimental system for studying the water impact of a vehicle during flight with angle of attack and sideslip angle, as described in claim 1 or 2, is characterized in that... The pneumatic clamp has a pneumatic clamp vent at the top and pneumatic clamp fingers at the bottom. The experimental projectile is gripped by the pneumatic clamp fingers, and interference with the movement of the experimental projectile must be avoided at the moment the pneumatic clamp fingers open rapidly.

6. The experimental system for studying the water impact of a vehicle during flight with angle of attack and sideslip angle, as described in claim 1 or 2, is characterized in that... The camera subsystem includes a high-speed camera and a high-speed camera leveling tripod mounted below the high-speed camera. The horizon of the high-speed camera must be level with the water surface in the water tank system.

7. The experimental system for studying the water impact of a vehicle during flight with angle of attack and sideslip angle as described in claim 1 or 2, characterized in that, The water tank system includes a water tank body made of transparent material, and a photoelectric switch is installed on each of the opposite sides of the top of the water tank body. A blackboard extends outward from the outer wall of the cylinder slider, and the opposing laser beams emitted by the two photoelectric switches can be blocked by the blackboards that are moved to the corresponding positions.

Images