A projectile-type clamping and launching system and method

Abstract

This invention provides a projectile-type clamping and launching system and method, including a projectile-type launching model and a clamping and launching device. The projectile-type launching model includes a projectile-type launching object, an x-direction wedge-shaped positioning recess, a z-direction wedge-shaped positioning recess, and a clamping block. The clamping and launching device includes a clamping and launching base, an x-direction wedge-shaped positioning protrusion, a z-direction wedge-shaped positioning protrusion, a Y-type clamp, and a Y-type clamp driving mechanism. The projectile-type clamping and launching system and method provided by this invention meets the spatial compatibility design requirements of the clamping and launching device for the projectile-type launching model with the carrier during wind tunnel testing. Simultaneously, it ensures the repeatability of the projectile-type launching model's installation posture and launching trajectory, improving the accuracy of wind tunnel test results.

Description

Technical Field

[0001] This invention belongs to the field of wind tunnel experimental technology, specifically relating to a projectile clamping and launching system and method. Background Technology

[0002] Wind tunnel testing is an aerodynamic experimental method that involves setting up aircraft models in a wind tunnel to study the interaction between gas flow and the aircraft models, and to obtain the aerodynamic characteristics of the aircraft during actual flight. Wind tunnel testing often includes drop-type experiments, especially the drop of various types of missiles and auxiliary fuel tanks. These experiments require simulating the drop-off behavior of missiles / auxiliary fuel tanks (referred to as missile-type drop models) in a high-altitude atmospheric environment to meet the similarity criteria of wind tunnel testing.

[0003] In the prior art, when using a launching device to conduct launching tests on projectile-type launching models in a wind tunnel, the following problems mainly exist: (1) Due to the small carrier space of the projectile-type launching model in the wind tunnel, it is not easy to install and arrange the launching device for the projectile-type launching model. (2) The repeatability accuracy of the installation posture of the projectile-type launching model and the attitude of the launching trajectory during the launching process is not high, resulting in low repeatability accuracy of the launching test results.

[0004] It is evident that the performance of the launch device directly affects the success or failure and repeatability of wind tunnel test results, and existing technologies urgently need to address these issues. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a projectile clamping and launching system and method, which can effectively solve the above-mentioned problems.

[0006] The technical solution adopted in this invention is as follows:

[0007] The present invention provides a projectile clamping and launching system, including a projectile launching model (100) and a clamping and launching device (200);

[0008] The projectile-type launching model (100) includes a projectile-type launching object (101), a wedge-shaped positioning recess (102) in the x direction, a wedge-shaped positioning recess (103) in the z direction, and a clamping block (104);

[0009] The axial direction of the projectile-type projectile (101) is defined as the x-direction; the direction perpendicular to the vertical plane of the projectile-type projectile (101) is defined as the z-direction; the y-direction is determined by the x-direction and the z-direction; the position where the x-direction intersects with the centroid of the projectile-type projectile (101) is defined as the installation position of the clamping block (104), and the clamping block (104) is installed at this installation position; along the x-direction, the x-direction wedge-shaped positioning recess (102) and the z-direction wedge-shaped positioning recess (103) are installed on both sides of the clamping block (104).

[0010] The clamping and throwing device (200) includes a clamping and throwing base (201), an x-direction wedge-shaped positioning protrusion (202), a z-direction wedge-shaped positioning protrusion (203), a Y-type clamp (204), and a Y-type clamp driving mechanism (205);

[0011] At the bottom of the clamping and throwing base (201), an x-direction wedge-shaped positioning protrusion (202) matching the x-direction wedge-shaped positioning recess (102) and a z-direction wedge-shaped positioning protrusion (203) matching the z-direction wedge-shaped positioning recess (103) are respectively fixedly installed; a Y-shaped clamp (204) for clamping and releasing the clamping block (104) is assembled between the x-direction wedge-shaped positioning protrusion (202) and the z-direction wedge-shaped positioning protrusion (203); a Y-shaped clamp driving mechanism (205) is installed inside the clamping and throwing base (201), and the Y-shaped clamp driving mechanism (205) is used to drive the Y-shaped clamp (204) to perform actions.

[0012] Preferably, the x-direction wedge-shaped positioning recess (102) has a V-shaped groove, the longitudinal direction of the bottom of the V-shaped groove is parallel to the z-direction; the z-direction wedge-shaped positioning recess (103) has a V-shaped groove, the longitudinal direction of the bottom of the V-shaped groove is parallel to the x-direction.

[0013] Preferably, the V-shaped grooves opened in the x-direction wedge-shaped positioning recess (102) and the V-shaped grooves opened in the z-direction wedge-shaped positioning recess (103) have the same shape and size.

[0014] Preferably, the x-direction wedge-shaped positioning protrusion (202) and the z-direction wedge-shaped positioning protrusion (203) each have a V-shaped positioning block that matches the V-shaped groove of the x-direction wedge-shaped positioning recess (102) and the z-direction wedge-shaped positioning recess (103).

[0015] Preferably, the clamping block (104) is a mushroom-shaped clamping block, including a rectangular support portion (1041) and an arc-shaped clamping block portion (1042) located above the rectangular support portion (1041); the center of the arc-shaped clamping block portion (1042) is provided with a flow hole (1043) along the x direction; the arc-shaped clamping block portion (1042) includes a first arc-shaped clamping block portion and a second arc-shaped clamping block portion symmetrically arranged along the y direction.

[0016] Preferably, the Y-shaped clamp (204) includes a first jaw (2041), a second jaw (2042), and a central rotating column (2043);

[0017] The central rotating column (2043) is arranged along the x-direction and fixed inside the clamping and throwing base (201); the first gripper (2041) and the second gripper (2042) are arranged symmetrically relative to each other along the y-direction, and the tops of the first gripper (2041) and the second gripper (2042) are fitted over the outside of the central rotating column (2043), so that the first gripper (2041) and the second gripper (2042) rotate around the central rotating column (2043) around the x-axis to perform the action of opening and closing the gripper;

[0018] The first gripper (2041) and the second gripper (2042) are respectively used to grip the first arc-shaped gripper portion and the second arc-shaped gripper portion of the gripper block (104).

[0019] Preferably, the arc-shaped notches of the first gripper (2041) and the second gripper (2042) are symmetrical about the y-direction, and the arc-shaped notches are in the range of [30°, 166°].

[0020] Preferably, the Y-type clamp drive mechanism (205) includes a first armature (2051), a first coil base (2052), a first coil, a pre-embedded spring, a second armature (2053), a second coil base (2054), a second coil, and a DC power supply;

[0021] The first armature (2051) is fixed to the outer surface of the first gripper (2041); the first coil base (2052) is fixed to the clamping and throwing base (201) and close to the first armature (2051), but there is a gap between them to allow the first armature (2051) to move; the first coil is disposed inside the first coil base (2052);

[0022] The second armature (2053) is fixed to the outer surface of the second gripper (2042); the second coil base (2054) is fixed to the clamping and throwing base (201) and close to the second armature (2053), but a gap is left between the second armature (2053) and the second armature (2053) to allow the second armature (2053) to move; the second coil is arranged inside the second coil base (2054);

[0023] An embedded spring is provided between the first gripper (2041) and the second gripper (2042). When the first coil and the second coil are not energized, the first gripper (2041) and the second gripper (2042) are in a closed clamping state under the action of the embedded spring. When the first coil and the second coil are connected to a DC power supply, an electromagnetic force is generated, causing the first armature (2051) to drive the first gripper (2041) to rotate around the x-axis and open in the z-direction, and causing the second armature (2053) to drive the second gripper (2042) to rotate around the x-axis and open in the z-direction, thereby causing the first gripper (2041) and the second gripper (2042) to rotate and open.

[0024] Preferably, the shape of the clamping and throwing base (201) is the same as that of the carrier of the equipment mounted in the aircraft, and a wire groove is reserved.

[0025] The present invention also provides a method for launching a projectile-type clamping and launching system, comprising the following steps:

[0026] Step S1: Power the DC power supply to the Y-type clamp drive mechanism (205); at this time, the first coil and the second coil generate electromagnetic force after being connected to the DC power supply, causing the first jaw (2041) and the second jaw (2042) of the Y-type clamp (204) to rotate to the open state.

[0027] Step S2: Assemble the projectile-type launching model (100) below the clamping and launching device (200), so that the x-direction wedge-shaped positioning protrusion (202) is embedded in the x-direction wedge-shaped positioning recess (102), and the z-direction wedge-shaped positioning protrusion (203) is embedded in the z-direction wedge-shaped positioning recess (103), thereby achieving positioning of the projectile-type launching model (100) in the x and z directions;

[0028] When the DC power supply of the Y-type clamp drive mechanism (205) is turned off, under the action of the pre-embedded spring, the first gripper (2041) and the second gripper (2042) rotate to the closed state, clamping the clamp block (104) of the projectile-type launch model (100) to achieve the positioning of the projectile-type launch model (100) in the y direction.

[0029] Step S3: In the wind tunnel, after the clamping and launching device (200) clamps and fixes the projectile-type launching model (100), the carrier aircraft carries the clamping and launching device (200) and the projectile-type launching model (100) to the target position.

[0030] The DC power supply is supplied to the Y-type clamp drive mechanism (205); at this time, the first coil and the second coil generate electromagnetic force after the DC power supply is connected, causing the first gripper (2041) and the second gripper (2042) of the Y-type clamp (204) to rotate to the open state, releasing the projectile-type throwing model (100), so that the projectile-type throwing model (100) can achieve free fall throwing.

[0031] The projectile-type clamping and launching system and method provided by this invention have the following advantages:

[0032] The present invention provides a clamping and launching system and method for projectiles, which meets the design requirements for spatial compatibility between the clamping and launching device and the carrier space of the projectile launching model during wind tunnel testing. At the same time, it ensures the repeatability of the installation posture and launching trajectory of the projectile launching model, thereby improving the accuracy of wind tunnel test results. Attached Figure Description

[0033] Figure 1 A structural diagram of the projectile clamping and launching system provided by the present invention in the clamping state;

[0034] Figure 2 A structural diagram of the projectile-type clamping and launching system provided by the present invention in the separated state of the projectile-type launching model and the clamping and launching device;

[0035] Figure 3 This is a structural diagram of the projectile-type launching model provided by the present invention;

[0036] Figure 4 A partial view of the projectile-type launching model provided by the present invention;

[0037] Figure 5 The structural diagram of the wedge-shaped positioning concave block and the wedge-shaped positioning protrusion provided by the present invention;

[0038] Figure 6 This is an overall structural diagram of the clamping and throwing base, the x-direction wedge-shaped positioning protrusion, and the z-direction wedge-shaped positioning protrusion provided by the present invention.

[0039] Figure 7 This is a structural diagram of the Y-shaped clamp provided by the present invention;

[0040] Figure 8 This is a structural diagram of the Y-type clamp and the Y-type clamp driving mechanism provided by the present invention;

[0041] Figure 9The trajectory diagram of the projectile-type launching model obtained from seven launching tests provided by the present invention.

[0042] in:

[0043] 100. Projectile-type launching model; 200. Clamping and launching device;

[0044] 101. Projectile-type projectile; 102. X-direction wedge-shaped positioning recess; 103. Z-direction wedge-shaped positioning recess; 104. Clamping block; 201. Clamping and launching base; 202. X-direction wedge-shaped positioning protrusion; 203. Z-direction wedge-shaped positioning protrusion; 204. Y-type clamp; 205. Y-type clamp drive mechanism;

[0045] 1041, Rectangular support part; 1042, Arc-shaped clamping block part; 2041, First clamping jaw; 2042, Second clamping jaw; 2043, Central rotating column; 2051, First armature; 2052, First coil base; 2053, Second armature; 2054, Second coil base. Detailed Implementation

[0046] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the invention.

[0047] To address the critical issue of spatial compatibility design between the clamping and launching device and the carrier space for projectile-type launch models during wind tunnel testing, and to ensure the repeatability of the installation posture and launch trajectory of the projectile-type launch models, thereby improving the accuracy of wind tunnel test results, this invention proposes a projectile-type clamping and launching system. This system employs an embedded design and is used for clamping and launching cylindrical projectile-type objects in wind tunnel tests, such as for launching auxiliary fuel tank models. Figure 1 and Figure 2 As shown, it includes a projectile-type launching model 100 and a clamping and launching device 200.

[0048] The structures of the projectile-type launching model 100 and the clamping and launching device 200 are described in detail below:

[0049] (I) Projectile-type launching model 100

[0050] See Figures 3-5 The projectile-type launching model 100 includes a projectile-type launching object 101, a wedge-shaped positioning recess 102 in the x direction, a wedge-shaped positioning recess 103 in the z direction, and a clamping block 104.

[0051] Define the axial direction of the projectile-type projectile 101 as the x-direction; define the direction perpendicular to the vertical plane of the projectile-type projectile 101 as the z-direction; and determine the y-direction using the x-direction and z-direction.

[0052] On the surface of the projectile-type projectile 101, the position where the cross section of the x-direction intersects with the center of mass of the projectile-type projectile 101 is determined as the installation position of the clamping block 104, and the clamping block 104 is installed at this installation position; along the x-direction, an x-direction wedge-shaped positioning recess 102 and a z-direction wedge-shaped positioning recess 103 are installed on both sides of the clamping block 104, and the whole is arranged in a "I" shape.

[0053] In this invention, the x-direction wedge-shaped positioning recess 102 has a V-shaped groove, the longitudinal direction of the bottom of the V-shaped groove being parallel to the z-direction; the z-direction wedge-shaped positioning recess 103 has a V-shaped groove, the longitudinal direction of the bottom of the V-shaped groove being parallel to the x-direction. The V-shaped grooves of the x-direction wedge-shaped positioning recess 102 and the z-direction wedge-shaped positioning recess 103 have the same shape and size.

[0054] In this invention, an x-direction wedge-shaped positioning recess 102 and a z-direction wedge-shaped positioning recess 103 are designed on the surface of the projectile-type projectile 101. By cooperating with the x-direction wedge-shaped positioning protrusion 202 and the z-direction wedge-shaped positioning protrusion 203 arranged in the clamping and launching device 200, wedge-shaped positioning of the projectile-type projectile 101 in the x and z directions can be achieved.

[0055] The x-direction wedge-shaped positioning recess 102 and the z-direction wedge-shaped positioning recess 103 are V-shaped grooves. The specific advantages of this design are: while achieving positioning in the x and z directions, the contact area between the x-direction wedge-shaped positioning recess 102 and the x-direction wedge-shaped positioning protrusion 202 is minimized, as is the contact area between the z-direction wedge-shaped positioning recess 103 and the z-direction wedge-shaped positioning protrusion 203. When the clamping and throwing device 200 releases the projectile-like projectile 101, the interference with the projectile-like projectile 101 is minimized, ensuring the consistency of the projectile-like projectile 101 during throwing and its trajectory, achieving its "free fall" throwing, and improving the accuracy of wind tunnel test results.

[0056] See Figure 5 The clamping block 104 is a mushroom-shaped clamping block, including a rectangular support portion 1041 and an arc-shaped clamping block portion 1042 located above the rectangular support portion 1041; a flow hole 1043 along the x-direction is opened at the center of the arc-shaped clamping block portion 1042; the arc-shaped clamping block portion 1042 includes a first arc-shaped clamping block portion and a second arc-shaped clamping block portion symmetrically arranged along the y-direction. The clamping block 104 is used to be clamped by the Y-type clamp 204 to achieve y-direction positioning of the projectile-type projectile object 101.

[0057] In this invention, the x-direction wedge-shaped positioning concave block 102 (and the matching x-direction wedge-shaped positioning protrusion 202), the z-direction wedge-shaped positioning concave block 103 (and the matching z-direction wedge-shaped positioning protrusion 203), and the mushroom-shaped clamping block 104 are structures exclusively developed for this invention.

[0058] The x-direction wedge-shaped positioning recess 102 and the z-direction wedge-shaped positioning recess 103 are arranged in the front and rear directions along the x-direction. The mushroom-shaped clamping block 104 is located in the middle position of the x-direction wedge-shaped positioning recess 102 and the z-direction wedge-shaped positioning recess 103. The whole arrangement is in the shape of "I". Furthermore, the mushroom-shaped clamping block 104 is located at the centroid section of the model and is used to be clamped by the Y-type clamp 204.

[0059] (ii) Clamping and throwing device 200

[0060] The clamping and throwing device 200 includes a clamping and throwing base 201, an x-direction wedge-shaped positioning protrusion 202, a z-direction wedge-shaped positioning protrusion 203, a Y-type clamp 204, and a Y-type clamp driving mechanism 205;

[0061] See Figure 6 The shape of the clamping and launching base 201 is determined by the shape of the carrier of the equipment mounted in the aircraft, and is the same as the shape of the carrier of the equipment mounted in the aircraft. It also has reserved wire grooves and assembly holes for the Y-type clamp 204. The Y-type clamp drive mechanism 205 is installed inside the clamping and launching base 201, and the bottom of the clamping and launching base 201 is equipped with an x-direction wedge-shaped positioning protrusion 202 and a z-direction wedge-shaped positioning protrusion 203.

[0062] At the bottom of the clamping and throwing base 201, an x-direction wedge-shaped positioning protrusion 202 matching the x-direction wedge-shaped positioning recess 102 and a z-direction wedge-shaped positioning protrusion 203 matching the z-direction wedge-shaped positioning recess 103 are respectively fixedly installed; wherein, the x-direction wedge-shaped positioning protrusion 202 and the z-direction wedge-shaped positioning protrusion 203 each have a V-shaped positioning block matching the V-shaped groove of the x-direction wedge-shaped positioning recess 102 and the z-direction wedge-shaped positioning recess 103. The protruding ends of the x-direction wedge-shaped positioning protrusion 202 and the z-direction wedge-shaped positioning protrusion 203 are designed with rounded arcs. In this invention, the x-direction wedge-shaped positioning recess 102 and the x-direction wedge-shaped positioning protrusion 202 form a set of x-direction wedge-shaped positioning groups; the z-direction wedge-shaped positioning recess 103 and the z-direction wedge-shaped positioning protrusion 203 form a set of z-direction wedge-shaped positioning groups.

[0063] A Y-shaped clamp 204 for clamping and releasing the clamping block 104 is assembled between the x-direction wedge positioning protrusion 202 and the z-direction wedge positioning protrusion 203.

[0064] A Y-type clamp drive mechanism 205 is installed inside the clamping and throwing base 201. The Y-type clamp drive mechanism 205 is used to drive the Y-type clamp 204 to perform actions.

[0065] The Y-shaped clamp 204 is a structure specifically developed for this invention. (See reference...) Figure 7 The Y-type clamp 204 includes a first jaw 2041, a second jaw 2042, and a central rotating column 2043;

[0066] The central rotating column 2043 is arranged along the x-direction and fixed inside the clamping and throwing base 201; the first gripper 2041 and the second gripper 2042 are arranged symmetrically relative to each other along the y-direction, and the tops of the first gripper 2041 and the second gripper 2042 are fitted over the outside of the central rotating column 2043, so that the first gripper 2041 and the second gripper 2042 rotate around the central rotating column 2043 around the x-axis to perform the action of opening and closing the gripper;

[0067] The first gripper 2041 and the second gripper 2042 are used to grip the first arc-shaped gripper portion and the second arc-shaped gripper portion of the clamping block 104, respectively. The arc-shaped notches of the first gripper 2041 and the second gripper 2042 are symmetrical about the y-direction, and the arc-shaped notches are in the range of [30°, 166°].

[0068] See Figure 8 The Y-type clamp drive mechanism 205 includes a first armature 2051, a first coil base 2052, a first coil, a pre-embedded spring, a second armature 2053, a second coil base 2054, a second coil, and a DC power supply.

[0069] The first armature 2051 is fixed to the outer surface of the first gripper 2041; the first coil base 2052 is fixed to the gripping and throwing base 201 and close to the first armature 2051, but there is a gap between it and the first armature 2051 to allow the first armature 2051 to move; the first coil is arranged inside the first coil base 2052.

[0070] The second armature 2053 is fixed to the outer surface of the second gripper 2042; the second coil base 2054 is fixed to the gripping and throwing base 201 and close to the second armature 2053, but there is a gap between it and the second armature 2053 to allow the second armature 2053 to move; a second coil is provided inside the second coil base 2054.

[0071] A pre-embedded spring is provided between the first gripper 2041 and the second gripper 2042. When the first coil and the second coil are not energized, the first gripper 2041 and the second gripper 2042 are in a closed clamping state under the action of the pre-embedded spring. When the first coil and the second coil are connected to a DC power supply, an electromagnetic force is generated, which causes the first armature 2051 to drive the first gripper 2041 to rotate around the x-axis and open in the z-direction, and causes the second armature 2053 to drive the second gripper 2042 to rotate around the x-axis and open in the z-direction, thereby causing the first gripper 2041 and the second gripper 2042 to rotate and open.

[0072] The present invention also provides a method for launching a projectile-type clamping and launching system, comprising the following steps:

[0073] Step S1: Power the DC power supply to the Y-type clamp drive mechanism 205; at this time, the first coil and the second coil generate electromagnetic force after being connected to the DC power supply, causing the first gripper 2041 and the second gripper 2042 of the Y-type clamp 204 to rotate to the open state.

[0074] Step S2: Assemble the projectile-type launching model 100 below the clamping and launching device 200, so that the x-direction wedge-shaped positioning protrusion 202 is embedded in the x-direction wedge-shaped positioning recess 102, and the z-direction wedge-shaped positioning protrusion 203 is embedded in the z-direction wedge-shaped positioning recess 103, thereby achieving the positioning of the projectile-type launching model 100 in the x and z directions.

[0075] When the DC power supply to the Y-type clamp drive mechanism 205 is turned off, the first gripper 2041 and the second gripper 2042 rotate to the closed state under the action of the pre-embedded spring, clamping the clamp block 104 of the projectile-type launch model 100, thereby achieving the positioning of the projectile-type launch model 100 in the y direction.

[0076] Step S3: In the wind tunnel, after the clamping and launching device 200 clamps and fixes the projectile-type launching model 100, the carrier aircraft carries the clamping and launching device 200 and the projectile-type launching model 100 to the target position.

[0077] The DC power supply is supplied to the Y-type clamp drive mechanism 205; at this time, the first coil and the second coil generate electromagnetic force after the DC power supply is connected, causing the first gripper 2041 and the second gripper 2042 of the Y-type clamp 204 to rotate to the open state, releasing the projectile-type throwing model 100, so that the projectile-type throwing model 100 can achieve free fall throwing.

[0078] In summary, the projectile clamping and launching system provided by this invention has the following design features:

[0079] (1) The surface of the projectile-type launching model 100 is designed with a wedge-shaped positioning recess 102, a clamping block 104 and a wedge-shaped positioning recess 103 arranged in a straight line in the x direction; the clamping and launching device 200 is designed with a wedge-shaped positioning protrusion 202 in the x direction, a Y-shaped clamp 204 and a wedge-shaped positioning protrusion 203 in the z direction; the positioning of the projectile-type launching model 100 in the x direction and z direction is realized by the cooperation of the recess and the protrusion; the positioning of the projectile-type launching model 100 in the y direction is realized by the clamping of the clamping block 104 by the Y-shaped clamp 204.

[0080] This enables comprehensive positioning of the projectile-type launch model 100 in the x, y, and z directions, ensuring the consistency of the installation posture of the projectile-type launch model 100 when it is held by the clamping and launching device 200, and ensuring repeatability.

[0081] (2) The x-direction wedge-shaped positioning recess 102 and the z-direction wedge-shaped positioning recess 103 are V-shaped grooves with small contact areas with the x-direction wedge-shaped positioning protrusion 202 and the z-direction wedge-shaped positioning protrusion 203. When the clamping and throwing device 200 releases the projectile-type projectile 101, the interference is small, thereby minimizing the interference on the projectile-type projectile 101, ensuring the consistency of the attitude and trajectory of the projectile-type projectile 101 during the throwing, realizing its "free fall" throwing, and improving the accuracy of the wind tunnel test results.

[0082] (3) The clamp 104 is a mushroom-shaped clamp with an arc-shaped clamp part 1042. When it is clamped by the Y-type clamp 204, it can improve the clamping stability and thus ensure the consistency of the installation posture of the projectile-type projectile 101.

[0083] (4) The shape of the clamping and throwing base 201 of the clamping and throwing device 200 is determined by the shape of the carrier of the equipment mounted in the aircraft. The Y-shaped clamping drive mechanism 205 and other components of the clamping and throwing device 200 are all located inside the clamping and throwing base 201. Only the necessary x-direction wedge positioning protrusion 202, z-direction wedge positioning protrusion 203 and gripper are exposed on the outside, thereby effectively reducing the volume of the clamping and throwing device 200 and meeting the space compatibility design requirements of the clamping and throwing device and carrier of the projectile-type throwing model during wind tunnel testing.

[0084] (5) The Y-type clamp drive mechanism 205 adopts an armature and coil structure, and controls the release action of the gripper through electromagnetic force, which has high structural sensitivity.

[0085] The projectile clamping and launching system and method provided by the present invention have the following advantages: they occupy little space, meet the space compatibility design requirements of the clamping and launching device and the carrier space for projectile launching models during wind tunnel tests; and achieve consistency in the installation posture and launching trajectory of the projectile launching model, making the launching test results repeatable.

[0086] Using the projectile-type clamping and launching system provided by this invention, two projectile-type launching models with different masses were designed: a first projectile-type launching model and a second projectile-type launching model. The clamping and launching device 200 designed by this invention was used to conduct seven launching tests in a wind tunnel under windless conditions.

[0087] The experimental method is as follows:

[0088] Drop tests were conducted on the first and second projectile-type launch models, respectively. The experimental procedure for each projectile-type launch model was as follows:

[0089] After the projectile-type launch model was released, a high-speed camera was used to record its entire descent. By analyzing the marked points on the projectile-type launch model and based on the principle of binocular vision, the spatial position information of the projectile-type launch model at each moment during the descent can be obtained, thus obtaining the launch trajectory of each projectile-type launch model in each release test. Since it was a windless free fall test, only data in the vertical descent direction is available.

[0090] For the first type of projectile-based launch model, the launch trajectories obtained from seven launch tests are as follows: Figure 9 As shown.

[0091] For each projectile type launch model, the launch trajectory obtained from seven launch tests was analyzed to obtain the position repeatability accuracy of each projectile type launch model. The results are shown in Table 1.

[0092] Table 1. Launch measurement results of the projectile-type launch model.

[0093] Test Project First type of projectile launching model Second type of projectile launching model Position repeatability <0.1％ <0.4％

[0094] As can be seen from Table 1, when the clamping and throwing device 200 designed in this invention is used to conduct throwing tests on projectile-type throwing models, the position repeatability of the projectile-type throwing models is very high, the throwing trajectory is repeatable, the position accuracy of the projectile-type throwing models is high, the attitude is stable, and the throwing test has good repeatability, which can meet the requirements of model throwing tests in wind tunnels.

[0095] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A projectile-type clamping and launching system, characterized in that, It includes a projectile-type launch model (100) and a clamping and launching device (200); The projectile-type launching model (100) includes a projectile-type launching object (101), a wedge-shaped positioning recess (102) in the x direction, a wedge-shaped positioning recess (103) in the z direction, and a clamping block (104); The axial direction of the projectile-type projectile (101) is defined as the x-direction; the direction perpendicular to the vertical plane of the projectile-type projectile (101) is defined as the z-direction; the y-direction is determined by the x-direction and the z-direction; the position where the x-direction intersects with the centroid of the projectile-type projectile (101) is defined as the installation position of the clamping block (104), and the clamping block (104) is installed at this installation position; along the x-direction, the x-direction wedge-shaped positioning recess (102) and the z-direction wedge-shaped positioning recess (103) are installed on both sides of the clamping block (104). The clamping and throwing device (200) includes a clamping and throwing base (201), an x-direction wedge-shaped positioning protrusion (202), a z-direction wedge-shaped positioning protrusion (203), a Y-type clamp (204), and a Y-type clamp driving mechanism (205); At the bottom of the clamping and throwing base (201), an x-direction wedge-shaped positioning protrusion (202) matching the x-direction wedge-shaped positioning recess (102) and a z-direction wedge-shaped positioning protrusion (203) matching the z-direction wedge-shaped positioning recess (103) are respectively fixedly installed; a Y-shaped clamp (204) for clamping and releasing the clamping block (104) is assembled between the x-direction wedge-shaped positioning protrusion (202) and the z-direction wedge-shaped positioning protrusion (203); a Y-shaped clamp driving mechanism (205) is installed inside the clamping and throwing base (201), and the Y-shaped clamp driving mechanism (205) is used to drive the Y-shaped clamp (204) to perform actions.

2. The projectile-type clamping and launching system according to claim 1, characterized in that, The x-direction wedge-shaped positioning recess (102) has a V-shaped groove, the longitudinal direction of the bottom of the V-shaped groove is parallel to the z-direction; the z-direction wedge-shaped positioning recess (103) has a V-shaped groove, the longitudinal direction of the bottom of the V-shaped groove is parallel to the x-direction.

3. The projectile-type clamping and launching system according to claim 2, characterized in that, The V-shaped grooves opened in the x-direction wedge-shaped positioning recess (102) and the V-shaped grooves opened in the z-direction wedge-shaped positioning recess (103) have the same shape and size.

4. A projectile-type clamping and launching system according to claim 2, characterized in that, The x-direction wedge-shaped positioning protrusion (202) and the z-direction wedge-shaped positioning protrusion (203) each have a V-shaped positioning block that matches the V-shaped groove of the x-direction wedge-shaped positioning recess (102) and the z-direction wedge-shaped positioning recess (103).

5. A projectile-type clamping and launching system according to claim 1, characterized in that, The clamping block (104) is a mushroom-shaped clamping block, including a rectangular support part (1041) and an arc-shaped clamping block part (1042) located above the rectangular support part (1041); the center of the arc-shaped clamping block part (1042) is provided with a flow hole (1043) along the x direction; the arc-shaped clamping block part (1042) includes a first arc-shaped clamping block part and a second arc-shaped clamping block part symmetrically arranged along the y direction.

6. A projectile-type clamping and launching system according to claim 5, characterized in that, The Y-shaped clamp (204) includes a first jaw (2041), a second jaw (2042), and a central rotating column (2043); The central rotating column (2043) is arranged along the x-direction and fixed inside the clamping and throwing base (201); the first gripper (2041) and the second gripper (2042) are arranged symmetrically relative to each other along the y-direction, and the tops of the first gripper (2041) and the second gripper (2042) are fitted over the outside of the central rotating column (2043), so that the first gripper (2041) and the second gripper (2042) rotate around the central rotating column (2043) around the x-axis to perform the action of opening and closing the gripper; The first gripper (2041) and the second gripper (2042) are respectively used to grip the first arc-shaped gripper portion and the second arc-shaped gripper portion of the gripper block (104).

7. A projectile-type clamping and launching system according to claim 6, characterized in that, The arc-shaped notch of the first gripper (2041) and the second gripper (2042) is symmetrical about the y-direction, and the arc-shaped notch is in the range of [30°, 166°].

8. A projectile-type clamping and launching system according to claim 6, characterized in that, The Y-type clamp drive mechanism (205) includes a first armature (2051), a first coil base (2052), a first coil, a pre-embedded spring, a second armature (2053), a second coil base (2054), a second coil, and a DC power supply; The first armature (2051) is fixed to the outer surface of the first gripper (2041); the first coil base (2052) is fixed to the clamping and throwing base (201) and close to the first armature (2051), but there is a gap between them to allow the first armature (2051) to move; the first coil is disposed inside the first coil base (2052); The second armature (2053) is fixed to the outer surface of the second gripper (2042); the second coil base (2054) is fixed to the clamping and throwing base (201) and close to the second armature (2053), but a gap is left between the second armature (2053) and the second armature (2053) to allow the second armature (2053) to move; the second coil is arranged inside the second coil base (2054); An embedded spring is provided between the first gripper (2041) and the second gripper (2042). When the first coil and the second coil are not energized, the first gripper (2041) and the second gripper (2042) are in a closed clamping state under the action of the embedded spring. When the first coil and the second coil are connected to a DC power supply, an electromagnetic force is generated, causing the first armature (2051) to drive the first gripper (2041) to rotate around the x-axis and open in the z-direction, and causing the second armature (2053) to drive the second gripper (2042) to rotate around the x-axis and open in the z-direction, thereby causing the first gripper (2041) and the second gripper (2042) to rotate and open.

9. A projectile-type clamping and launching system according to claim 1, characterized in that, The shape of the clamping and launching base (201) is the same as that of the carrier of the equipment mounted in the aircraft, and a wire groove is reserved.

10. A method for launching a projectile-type clamping and launching system according to any one of claims 1-9, characterized in that, Includes the following steps: Step S1: Power the DC power supply to the Y-type clamp drive mechanism (205); at this time, the first coil and the second coil generate electromagnetic force after being connected to the DC power supply, causing the first jaw (2041) and the second jaw (2042) of the Y-type clamp (204) to rotate to the open state. Step S2: Assemble the projectile-type launching model (100) below the clamping and launching device (200), so that the x-direction wedge-shaped positioning protrusion (202) is embedded in the x-direction wedge-shaped positioning recess (102), and the z-direction wedge-shaped positioning protrusion (203) is embedded in the z-direction wedge-shaped positioning recess (103), thereby achieving positioning of the projectile-type launching model (100) in the x and z directions; When the DC power supply of the Y-type clamp drive mechanism (205) is turned off, under the action of the pre-embedded spring, the first gripper (2041) and the second gripper (2042) rotate to the closed state, clamping the clamp block (104) of the projectile-type launch model (100) to achieve the positioning of the projectile-type launch model (100) in the y direction. Step S3: In the wind tunnel, after the clamping and launching device (200) clamps and fixes the projectile-type launching model (100), the carrier aircraft carries the clamping and launching device (200) and the projectile-type launching model (100) to the target position. The DC power supply is supplied to the Y-type clamp drive mechanism (205); at this time, the first coil and the second coil generate electromagnetic force after the DC power supply is connected, causing the first gripper (2041) and the second gripper (2042) of the Y-type clamp (204) to rotate to the open state, releasing the projectile-type throwing model (100), so that the projectile-type throwing model (100) can achieve free fall throwing.

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