Clamping and jettisoning system and method for projectile bodies

Abstract

The invention provides a projectile body class clamping and throwing system and method. The projectile body class clamping and throwing system comprises a projectile body class throwing model and a clamping and throwing device. The projectile body type throwing model comprises a projectile body type throwing object, an x-direction wedge-shaped positioning concave block, a z-direction wedge-shaped positioning concave block and a clamping block; the clamping and throwing device comprises a clamping and throwing base, an x-direction wedge-shaped positioning protruding block, a z-direction wedge-shaped positioning protruding block, a Y-shaped clamp and a Y-shaped clamp driving mechanism. According to the projectile clamping and jettisoning system and method provided by the invention, the space compatibility design requirement of a clamping and jettisoning device of a projectile jettisoning model and a carrier during a wind tunnel test is met, meanwhile, the mounting posture of the projectile jettisoning model and the jettisoning track in the jettisoning process are ensured to have repeatability, and the accuracy of a wind tunnel test result is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of wind tunnel experiments, and in particular relates to a system and method for clamping and releasing a projectile. Background Art

[0002] Wind tunnel experiment is an aerodynamic experiment method that arranges aircraft models in a wind tunnel to study the interaction between gas flow and aircraft models and obtain the aerodynamic characteristics of the aircraft during actual flight. In wind tunnel experiments, there will be jettisoning tests, especially the jettisoning of various types of missiles and auxiliary fuel tanks, which need to simulate the jettisoning rules of missiles / auxiliary fuel tanks (referred to as: missile-type jettisoning models) in high-altitude atmospheric environments to meet the similarity criteria of wind tunnel experiments.

[0003] In the prior art, when a projectile-like ...

[0004] It can be seen that the performance of the launching device directly affects the success and repeatability of the wind tunnel test results, and the existing technology urgently needs to solve the above problems. Summary of the invention

[0005] In view of the defects in the prior art, the present invention provides a system and method for clamping and releasing a projectile, which can effectively solve the above problems.

[0006] The technical solution adopted by the present invention is as follows:

[0007] The present invention provides a projectile-type clamping and throwing system, comprising a projectile-type throwing model (100) and a clamping and throwing device (200);

[0008] The projectile-like projectile model (100) comprises a projectile-like projectile object (101), an x-direction wedge-shaped positioning recess (102), a z-direction wedge-shaped positioning recess (103), and a clamping block (104);

[0009] The axial direction of the projectile-like projectile (101) is defined as the x direction; the direction perpendicular to the vertical plane of the projectile-like projectile (101) is defined as the z direction; the y direction is determined by the x direction and the z direction; on the surface of the projectile-like projectile (101), the position where the x direction and the cross section of the center of mass of the projectile-like projectile (101) intersect is determined as the installation position of the clamp (104), and the clamp (104) is installed at this installation position; along the x direction, the x-direction wedge-shaped positioning recessed block (102) and the z-direction wedge-shaped positioning recessed block (103) are respectively installed on both sides of the clamp (104);

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

[0011] The x-direction wedge-shaped positioning protrusion (202) matching the x-direction wedge-shaped positioning recess (102) and the z-direction wedge-shaped positioning protrusion (203) matching the z-direction wedge-shaped positioning recess (103) are respectively fixedly mounted at the bottom of the clamping and throwing base (201); the Y-shaped clamp (204) for clamping and releasing the clamp (104) is assembled between the x-direction wedge-shaped positioning protrusion (202) and the z-direction wedge-shaped positioning protrusion (203); the 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 move.

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

[0013] Preferably, the V-shaped groove formed by the x-direction wedge-shaped positioning recess (102) and the V-shaped groove formed by the z-direction wedge-shaped positioning recess (103) are completely the same in shape and size.

[0014] Preferably, the x-direction wedge-shaped positioning protrusion (202) and the z-direction wedge-shaped positioning protrusion (203) respectively have V-shaped positioning blocks that match the V-shaped grooves of the x-direction wedge-shaped positioning concave block (102) and the z-direction wedge-shaped positioning concave block (103).

[0015] Preferably, the clamp (104) is a mushroom-shaped clamp, comprising a rectangular support portion (1041) and an arc-shaped clamp 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 clamp portion (1042); the arc-shaped clamp portion (1042) comprises a first arc-shaped clamp portion and a second arc-shaped clamp portion symmetrically arranged along the y-direction.

[0016] Preferably, the Y-shaped clamp (204) comprises a first clamp (2041), a second clamp (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 clamp (2041) and the second clamp (2042) are relatively symmetrically arranged along the y direction, and the tops of the first clamp (2041) and the second clamp (2042) are sleeved on the outside of the central rotating column (2043), so that the first clamp (2041) and the second clamp (2042) rotate around the x axis around the central rotating column (2043) to perform the action of opening and closing the clamps;

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

[0019] Preferably, the circular arc missing angles of the first clamping jaw (2041) and the second clamping jaw (2042) are symmetrical about the y direction, and the circular arc missing angles are in the range of [30°, 166°].

[0020] Preferably, the Y-shaped clamp driving mechanism (205) comprises a first armature (2051), a first coil base (2052), a first coil, an 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 clamping claw (2041); the first coil base (2052) is fixed to the clamping and throwing base (201) and is close to the first armature (2051), but a space is left between the first armature (2051) and the first armature (2051) for the first armature (2051) to move; the first coil is arranged in the first coil base (2052);

[0022] The second armature (2053) is fixed to the outer surface of the second clamping claw (2042); the second coil base (2054) is fixed to the clamping and throwing base (201) and is 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 in the second coil base (2054);

[0023] The embedded spring is arranged between the first clamping jaw (2041) and the second clamping jaw (2042); when the first coil and the second coil are not energized, under the action of the embedded spring, the first clamping jaw (2041) and the second clamping jaw (2042) are in a closed clamping state; when the first coil and the second coil are connected to a DC power supply, an electromagnetic force is generated, so that the first armature (2051) drives the first clamping jaw (2041) to rotate around the x-axis and open along the z-direction, and the second armature (2053) drives the second clamping jaw (2042) to rotate around the x-axis and open along the z-direction, thereby causing the first clamping jaw (2041) and the second clamping jaw (2042) to rotate and open.

[0024] Preferably, the shape of the clamping and jettisoning base (201) is the same as the shape of a carrier for mounting equipment in an aircraft, and a wire groove is reserved.

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

[0026] Step S1, supplying power to the direct current power supply of the Y-shaped clamp driving mechanism (205); at this time, the first coil and the second coil are connected to the direct current power supply to generate electromagnetic force, so that the first clamping jaw (2041) and the second clamping jaw (2042) of the Y-shaped clamp (204) rotate to an open state;

[0027] Step S2, assembling the projectile-like throwing model (100) below the clamping and throwing device (200), so that the x-direction wedge-shaped positioning protrusion (202) is embedded in the x-direction wedge-shaped positioning concave block (102), and the z-direction wedge-shaped positioning protrusion (203) is embedded in the z-direction wedge-shaped positioning concave block (103), so as to realize the positioning of the projectile-like throwing model (100) in the x-direction and z-direction;

[0028] The direct current power supply of the Y-shaped clamp driving mechanism (205) is turned off, and under the action of the embedded spring, the first clamping jaw (2041) and the second clamping jaw (2042) rotate to a closed state, clamping the clamping block (104) of the projectile-like throwing model (100), thereby achieving the positioning of the projectile-like throwing model (100) in the y direction;

[0029] Step S3, in the wind tunnel, after the clamping and releasing device (200) clamps and fixes the missile-type releasing model (100), the carrier aircraft carries the clamping and releasing device (200) and the missile-type releasing model (100) to the target position;

[0030] The direct current power supply of the Y-shaped clamp driving mechanism (205) is powered; at this time, the first coil and the second coil are connected to the direct current power supply to generate electromagnetic force, so that the first clamp (2041) and the second clamp (2042) of the Y-shaped clamp (204) rotate to an open state, releasing the projectile-like throwing model (100), so that the projectile-like throwing model (100) is thrown in a free fall manner.

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

[0032] The present invention provides a system and method for clamping and releasing a projectile, which meet the design requirements for compatibility between the clamping and releasing device of the projectile-like releasing model and the carrier space during wind tunnel testing. At the same time, it ensures that the installation posture of the projectile-like releasing model and the releasing trajectory during the releasing process are repeatable, thereby improving the accuracy of the wind tunnel test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The overall structure diagram of the projectile-type clamping and throwing system provided by the present invention in the clamping state;

[0034] Figure 2 A structural diagram of the projectile-like clamping and throwing system provided by the present invention when the projectile-like throwing model and the clamping and throwing device are in a separated state;

[0035] Figure 3 A structural diagram of a projectile-type ejection model provided by the present invention;

[0036] Figure 4 A partial diagram of the projectile-like ejection model provided by the present invention;

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

[0038] Figure 6 The overall structure 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 A structural diagram of the Y-shaped clamp provided by the present invention;

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

[0041] Fig. 9This is a diagram of the launching trajectory of the projectile-type launching model obtained through seven launching tests provided by the present invention.

[0042] in:

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

[0044] 101, projectile-like projectile; 102, wedge-shaped positioning concave block in the x-direction; 103, wedge-shaped positioning concave block in the z-direction; 104, clamping block; 201, clamping and projecting base; 202, wedge-shaped positioning convex block in the x-direction; 203, wedge-shaped positioning convex block in the z-direction; 204, Y-type clamp; 205, Y-type clamp driving mechanism;

[0045] 1041, rectangular support portion; 1042, arc-shaped clamping block portion; 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 DESCRIPTION

[0046] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0047] In order to solve the key problem of the compatibility design between the clamping and jettisoning device of the projectile-like jettisoning model and the carrier space during the wind tunnel test, ensure the repeatability of the installation posture of the projectile-like jettisoning model and the jettisoning trajectory during the jettisoning process, and improve the accuracy of the wind tunnel test results, the present invention proposes a clamping and jettisoning system for projectiles, which adopts an embedded design and is used for the clamping and jettisoning device of the projectile-like cylindrical object in the wind tunnel test, for example, to jettison the auxiliary fuel tank model, such as 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-like throwing model 100 and the clamping and throwing device 200 are respectively introduced in detail below:

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

[0050] See also Figure 3 to Figure 5 The projectile-like projectile model 100 includes a projectile-like projectile object 101, an x-direction wedge-shaped positioning recess 102, a z-direction wedge-shaped positioning recess 103 and a clamping block 104;

[0051] The axis direction of the projectile-like projectile 101 is defined as the x direction; the direction perpendicular to the vertical plane of the projectile-like projectile 101 is defined as the z direction; the y direction is determined by the x direction and the z direction;

[0052] On the surface of the projectile-like projectile 101, the position where the x-direction and the cross section of the center of mass of the projectile-like projectile 101 intersect is determined as the installation position of the clamp 104, and the clamp 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 clamp 104, and the overall arrangement is in an "I" shape.

[0053] In the present invention, the x-direction wedge-shaped positioning concave block 102 is provided with a V-shaped groove, and the longitudinal direction of the groove bottom of the V-shaped groove is parallel to the z-direction; the z-direction wedge-shaped positioning concave block 103 is provided with a V-shaped groove, and the longitudinal direction of the groove bottom of the V-shaped groove is parallel to the x-direction. The V-shaped groove provided by the x-direction wedge-shaped positioning concave block 102 and the V-shaped groove provided by the z-direction wedge-shaped positioning concave block 103 are completely the same in shape and size.

[0054] In the present 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-like 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-like projectile 101 in the x-direction and z-direction 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 advantages of the specific design are: while achieving positioning in the x-direction and z-direction, the contact area between the x-direction wedge-shaped positioning recess 102 and the x-direction wedge-shaped positioning protrusion 202 is minimized, and the contact area between the z-direction wedge-shaped positioning recess 103 and the z-direction wedge-shaped positioning protrusion 203 is minimized. When the clamping and throwing device 200 releases the projectile-like throwing object 101, the interference effect on the projectile-like throwing object 101 is minimized, the consistency of the projectile-like throwing object 101 during throwing and the throwing trajectory is ensured, its "free fall" type throwing is achieved, and the accuracy of the wind tunnel test results is improved.

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

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

[0058] The x-direction wedge-shaped positioning recess 102 and the z-direction wedge-shaped positioning recess 103 are arranged in the front-to-back direction along the x-direction, and the mushroom-shaped clamping block 104 is located in the middle position between the x-direction wedge-shaped positioning recess 102 and the z-direction wedge-shaped positioning recess 103. The overall arrangement is in an "I" shape, and the mushroom-shaped clamping block 104 is located at the centroid section of the model for being clamped by the Y-shaped 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-shaped clamp 204 and a Y-shaped clamp driving mechanism 205;

[0061] See also Figure 6 The shape of the clamping and jettisoning base 201 is determined by the shape of the carrier of the mounted equipment in the aircraft, and is the same as the shape of the carrier of the mounted equipment in the aircraft, and a wire groove and assembly holes of the Y-type clamp 204 are reserved. The Y-type clamp driving mechanism 205 is installed inside the clamping and jettisoning base 201, and the x-direction wedge-shaped positioning protrusion 202 and the z-direction wedge-shaped positioning protrusion 203 are installed at the bottom of the clamping and jettisoning base 201.

[0062] At the bottom of the clamping and throwing base 201, an x-direction wedge-shaped positioning protrusion 202 matching with the x-direction wedge-shaped positioning concave block 102 and a z-direction wedge-shaped positioning protrusion 203 matching with the z-direction wedge-shaped positioning concave block 103 are fixedly installed respectively; wherein, the x-direction wedge-shaped positioning protrusion 202 and the z-direction wedge-shaped positioning protrusion 203 respectively have V-shaped positioning blocks matching with the V-shaped grooves of the x-direction wedge-shaped positioning concave block 102 and the z-direction wedge-shaped positioning concave block 103. The ends of the protruding surfaces of the x-direction wedge-shaped positioning protrusion 202 and the z-direction wedge-shaped positioning protrusion 203 are designed with inverted arcs. In the present invention, the x-direction wedge-shaped positioning concave block 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 concave block 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 clamp block 104 is assembled between the x-direction wedge-shaped positioning protrusion 202 and the z-direction wedge-shaped positioning protrusion 203;

[0064] 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 move.

[0065] The Y-shaped fixture 204 is a structure developed exclusively for the present invention, see Figure 7 , the Y-shaped clamp 204 includes a first clamping jaw 2041, a second clamping 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 clamping jaw 2041 and the second clamping jaw 2042 are relatively symmetrically arranged along the y direction, and the tops of the first clamping jaw 2041 and the second clamping jaw 2042 are sleeved outside the central rotating column 2043, so that the first clamping jaw 2041 and the second clamping jaw 2042 rotate around the x axis around the central rotating column 2043 to perform the action of opening and closing the clamping jaws;

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

[0068] See also Figure 8 , the Y-shaped fixture driving mechanism 205 includes a first armature 2051, a first coil base 2052, a first coil, an 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 clamping jaw 2041; the first coil base 2052 is fixed to the clamping and throwing base 201 and is close to the first armature 2051, but a space is left between the first armature 2051 and the first armature 2051 for the first armature 2051 to move; the first coil is arranged in the first coil base 2052;

[0070] The second armature 2053 is fixed to the outer surface of the second clamping jaw 2042; the second coil base 2054 is fixed to the clamping and throwing base 201 and is close to the second armature 2053, but a gap is left between the second armature 2053 and the second armature 2053 for the second armature 2053 to move; a second coil is arranged in the second coil base 2054;

[0071] An embedded spring is arranged between the first clamping jaw 2041 and the second clamping jaw 2042; when the first coil and the second coil are not energized, under the action of the embedded spring, the first clamping jaw 2041 and the second clamping jaw 2042 are in a closed clamping state; when the first coil and the second coil are connected to a DC power supply, an electromagnetic force is generated, so that the first armature 2051 drives the first clamping jaw 2041 to rotate around the x-axis and open along the z-direction, so that the second armature 2053 drives the second clamping jaw 2042 to rotate around the x-axis and open along the z-direction, thereby causing the first clamping jaw 2041 and the second clamping jaw 2042 to rotate and open.

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

[0073] Step S1, supplying power to the DC power supply of the Y-shaped clamp driving mechanism 205; at this time, the first coil and the second coil generate electromagnetic force after being connected to the DC power supply, so that the first clamping jaw 2041 and the second clamping jaw 2042 of the Y-shaped clamp 204 rotate to an open state;

[0074] Step S2, assembling the projectile-like throwing model 100 below the clamping and throwing device 200, so that the x-direction wedge-shaped positioning protrusion 202 is embedded in the x-direction wedge-shaped positioning concave block 102, and the z-direction wedge-shaped positioning protrusion 203 is embedded in the z-direction wedge-shaped positioning concave block 103, so as to realize the positioning of the projectile-like throwing model 100 in the x-direction and z-direction;

[0075] The DC power supply of the Y-shaped clamp driving mechanism 205 is turned off. Under the action of the embedded spring, the first clamp 2041 and the second clamp 2042 rotate to a closed state, clamping the clamp block 104 of the projectile-like throwing model 100, thereby positioning the projectile-like throwing model 100 in the y direction.

[0076] Step S3, in the wind tunnel, after the clamping and releasing device 200 clamps and fixes the missile-type releasing model 100, the carrier aircraft carries the clamping and releasing device 200 and the missile-type releasing model 100 to the target position;

[0077] The DC power supply of the Y-shaped clamp driving mechanism 205 is powered; at this time, the first coil and the second coil generate electromagnetic force after being connected to the DC power supply, so that the first jaw 2041 and the second jaw 2042 of the Y-shaped clamp 204 rotate to an open state, releasing the projectile-type throwing model 100, so that the projectile-type throwing model 100 can be thrown freely by falling.

[0078] In summary, the projectile-type clamping and throwing system provided by the present invention has the following design features:

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

[0080] This achieves comprehensive positioning of the projectile-like throwing model 100 in the x-direction, y-direction and z-direction, ensuring that the installation posture of the projectile-like throwing model 100 is consistent and repeatable when the projectile-like throwing model 100 is clamped by the clamping and throwing device 200.

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

[0082] (3) The clamping block 104 is a mushroom-shaped clamping block having an arc-shaped clamping block portion 1042 . When clamped by the Y-shaped clamp 204 , the clamping stability can be improved, thereby ensuring the consistency of the installation posture of the projectile-like projectile 101 .

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

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

[0085] The clamping and releasing system and method for projectiles provided by the present invention have the following advantages: small space occupation, meeting the design requirements of the compatibility between the clamping and releasing device and the carrier space of the projectile-like releasing model during wind tunnel testing; achieving consistency between the installation posture of the projectile-like releasing model and the releasing trajectory during the releasing process, making the releasing test results repeatable.

[0086] Using the projectile-type clamping and releasing system provided by the present invention, two projectile-type releasing models with different masses are designed, namely: a first projectile-type releasing model and a second projectile-type releasing model; and using the clamping and releasing device 200 designed by the present invention, seven release tests are carried out in a wind tunnel under windless conditions.

[0087] The experimental method is:

[0088] The first projectile-type ejection model and the second projectile-type ejection model were respectively subjected to the dropping test; for each projectile-type ejection model, the experimental process was as follows:

[0089] After the projectile-like throwing model is released, a high-speed camera is used to record the entire falling process of the projectile-like throwing model. By analyzing the marking points on the projectile-like throwing model, based on the principle of binocular vision, the spatial position information of the projectile-like throwing model at each moment in the falling process can be obtained, thereby obtaining the throwing trajectory of each projectile-like throwing model in each release test. Since it is a free fall test without wind, there is only data in the vertical falling direction.

[0090] For the first projectile type release model, the release trajectory obtained from the seven release tests is as follows: Fig. 9 shown.

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

[0092] Table 1. The ejection measurement results of the projectile ejection model

[0093] Test items The first projectile ejection model Second projectile type ejection model Position repeatability <0.1％ <0.4％

[0094] It can be seen from Table 1 that when the clamping and throwing device 200 designed in the present invention is used to carry out a throwing test on a projectile-type throwing model, the position repetition accuracy of the projectile-type throwing model during throwing is very high, the throwing trajectory is repeatable, the position accuracy of the projectile-type throwing model during throwing is high, the posture is stable, the throwing test has good repeatability, and can meet the requirements of the model throwing experiment in the wind tunnel.

[0095] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be considered as the scope of protection of the present invention.

Claims

1. A projectile-type clamping and throwing system, characterized in that: It comprises a projectile-type throwing model (100) and a clamping and throwing device (200); The projectile-like projectile model (100) comprises a projectile-like projectile object (101), an x-direction wedge-shaped positioning recess (102), a z-direction wedge-shaped positioning recess (103), and a clamping block (104); The axial direction of the projectile-like projectile (101) is defined as the x direction; the direction perpendicular to the vertical plane of the projectile-like projectile (101) is defined as the z direction; the y direction is determined by the x direction and the z direction; on the surface of the projectile-like projectile (101), the position where the x direction and the cross section of the center of mass of the projectile-like projectile (101) intersect is determined as the installation position of the clamp (104), and the clamp (104) is installed at this installation position; along the x direction, the x-direction wedge-shaped positioning recessed block (102) and the z-direction wedge-shaped positioning recessed block (103) are respectively installed on both sides of the clamp (104); The clamping and throwing device (200) comprises a clamping and throwing base (201), an x-direction wedge-shaped positioning convex block (202), a z-direction wedge-shaped positioning convex block (203), a Y-shaped clamp (204) and a Y-shaped clamp driving mechanism (205); The x-direction wedge-shaped positioning protrusion (202) matching the x-direction wedge-shaped positioning recess (102) and the z-direction wedge-shaped positioning protrusion (203) matching the z-direction wedge-shaped positioning recess (103) are respectively fixedly mounted at the bottom of the clamping and throwing base (201); the Y-shaped clamp (204) for clamping and releasing the clamp (104) is assembled between the x-direction wedge-shaped positioning protrusion (202) and the z-direction wedge-shaped positioning protrusion (203); the 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 move.

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

3. A projectile-type clamping and releasing system according to claim 2, characterized in that: The V-shaped groove formed by the x-direction wedge-shaped positioning recess (102) and the V-shaped groove formed by the z-direction wedge-shaped positioning recess (103) are completely the same in shape and size.

4. A projectile-type clamping and releasing 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) respectively have V-shaped positioning blocks that match the V-shaped grooves of the x-direction wedge-shaped positioning concave block (102) and the z-direction wedge-shaped positioning concave block (103).

5. The projectile-type clamping and releasing system according to claim 1, characterized in that: The clamping block (104) is a mushroom-shaped clamping block, comprising 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 provided at the center of the arc-shaped clamping block portion (1042); the arc-shaped clamping block portion (1042) comprises a first arc-shaped clamping block portion and a second arc-shaped clamping block portion symmetrically arranged along the y-direction.

6. A projectile-type clamping and releasing system according to claim 5, characterized in that: The Y-shaped clamp (204) comprises a first clamping jaw (2041), a second clamping 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 clamp (2041) and the second clamp (2042) are relatively symmetrically arranged along the y direction, and the tops of the first clamp (2041) and the second clamp (2042) are sleeved on the outside of the central rotating column (2043), so that the first clamp (2041) and the second clamp (2042) rotate around the x axis around the central rotating column (2043) to perform the action of opening and closing the clamps; The first clamping jaw (2041) and the second clamping jaw (2042) are used to clamp the first arc-shaped clamping block portion and the second arc-shaped clamping block portion of the clamping block (104), respectively.

7. A projectile-type clamping and releasing system according to claim 6, characterized in that: The circular arc missing angles of the first clamping jaw (2041) and the second clamping jaw (2042) are symmetrical about the y direction, and the circular arc missing angles are in the range of [30°, 166°].

8. The projectile-type clamping and releasing system according to claim 6, characterized in that: The Y-shaped clamp driving mechanism (205) comprises a first armature (2051), a first coil base (2052), a first coil, an 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 clamping claw (2041); the first coil base (2052) is fixed to the clamping and throwing base (201) and is close to the first armature (2051), but a space is left between the first armature (2051) and the first armature (2051) for the first armature (2051) to move; the first coil is arranged in the first coil base (2052); The second armature (2053) is fixed to the outer surface of the second clamping claw (2042); the second coil base (2054) is fixed to the clamping and throwing base (201) and is 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 in the second coil base (2054); The embedded spring is arranged between the first clamping jaw (2041) and the second clamping jaw (2042); when the first coil and the second coil are not energized, under the action of the embedded spring, the first clamping jaw (2041) and the second clamping jaw (2042) are in a closed clamping state; when the first coil and the second coil are connected to a DC power supply, an electromagnetic force is generated, so that the first armature (2051) drives the first clamping jaw (2041) to rotate around the x-axis and open along the z-direction, and the second armature (2053) drives the second clamping jaw (2042) to rotate around the x-axis and open along the z-direction, thereby causing the first clamping jaw (2041) and the second clamping jaw (2042) to rotate and open.

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

10. A method for releasing a projectile-type clamping and releasing system according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step S1, supplying power to the direct current power supply of the Y-shaped clamp driving mechanism (205); at this time, the first coil and the second coil are connected to the direct current power supply to generate electromagnetic force, so that the first clamping jaw (2041) and the second clamping jaw (2042) of the Y-shaped clamp (204) rotate to an open state; Step S2, assembling the projectile-like throwing model (100) below the clamping and throwing device (200), so that the x-direction wedge-shaped positioning protrusion (202) is embedded in the x-direction wedge-shaped positioning concave block (102), and the z-direction wedge-shaped positioning protrusion (203) is embedded in the z-direction wedge-shaped positioning concave block (103), so as to realize the positioning of the projectile-like throwing model (100) in the x-direction and z-direction; The direct current power supply of the Y-shaped clamp driving mechanism (205) is turned off, and under the action of the embedded spring, the first clamping jaw (2041) and the second clamping jaw (2042) rotate to a closed state, clamping the clamping block (104) of the projectile-like throwing model (100), thereby achieving the positioning of the projectile-like throwing model (100) in the y direction; Step S3, in the wind tunnel, after the clamping and releasing device (200) clamps and fixes the missile-type releasing model (100), the carrier aircraft carries the clamping and releasing device (200) and the missile-type releasing model (100) to the target position; The direct current power supply of the Y-shaped clamp driving mechanism (205) is powered; at this time, the first coil and the second coil are connected to the direct current power supply to generate electromagnetic force, so that the first clamp (2041) and the second clamp (2042) of the Y-shaped clamp (204) rotate to an open state, releasing the projectile-like throwing model (100), so that the projectile-like throwing model (100) is thrown in a free fall manner.

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