Electromagnetically driven ballistic correction fuse

Abstract

The electromagnetic driving ballistic correction fuze belongs to the technical field of ballistic correction, and the warhead, the fuze projectile body I, the fuze projectile body II, the chassis and the rudder frame are sequentially arranged and connected from top to bottom; other main components include two linear motors, a swing rod, a push rod, a sliding block, an electromagnet, a permanent magnet and a rudder. In the normal flight state, the linear motor II fixes the warhead without deflection; when the ballistic correction is performed, the rudder drives the fuze main body to rotate, the linear motor I drives the sliding block to move upwards and drives the push rod, so that the electromagnet is attracted to the permanent magnet, the swing rod is separated from the linear motor II, and the warhead is deflected. The linear motor I is coupled with the rudder, and can realize the deflection of the warhead within the range of 0-360° azimuth deflection angle and 0-6° deflection angle along the axis of the shell. The warhead fuze deflection is realized through electromagnetic driving, and the invention has the advantages of fast response speed, large deflection angle, strong bearing capacity, high flexibility and programmability.

Description

Technical Field

[0001] This invention belongs to the field of ballistic correction ammunition technology, specifically relating to an electromagnetically driven ballistic correction fuze. Background Technology

[0002] Ballistic correction methods mainly include pulse direct force correction, canard aerodynamic correction, and warhead deflection correction. Among these, warhead deflection correction, as a unique two-dimensional ballistic correction technology, has been widely studied in various countries. Compared with traditional artillery shells and missiles, adding a ballistic correction fuse to a traditional artillery shell has significant advantages.

[0003] The principle of warhead deflection for ballistic correction is to control the warhead to deviate from its axis through a drive mechanism, creating a pressure difference between the windward and leeward sides of the warhead. This generates aerodynamic control force and aerodynamic torque relative to the projectile body, thereby correcting the impact point of the ammunition. Warhead deflection ballistic correction fuses achieve high accuracy while significantly reducing costs, and are particularly compatible with conventional ammunition, making them a viable option for stockpiling modification. This technology offers higher control efficiency, better aerodynamic characteristics, and lower cost.

[0004] The driving methods for warhead deflection ballistic correction fuses, both domestically and internationally, are too simplistic, mostly relying on mechanical structures or piezoelectric materials. While mechanical actuation offers stability and ease of control, its slow response speed severely impacts ballistic correction. Smart materials can indeed compensate for this shortcoming, but their output displacement is only between tens and hundreds of micrometers, which is insufficient to meet the requirement of large warhead deflections.

[0005] Therefore, it is necessary to design a ballistic correction fuze that utilizes electromagnetic drive and has advantages such as large deflection angle, precise control and fast response. Summary of the Invention

[0006] The purpose of this invention is to provide an electromagnetically driven ballistic correction fuze that can deviate the projectile from its axis by 0 to 6 degrees in all circumferences, thereby achieving ballistic correction during projectile flight.

[0007] The present invention discloses an electromagnetically driven ballistic correction fuze, comprising a warhead 1, a fuze body I 2, a fuze body II 3, a chassis 4, a servo motor frame 5, a ball joint rotor 6, a rocker arm 7, a permanent magnet 8, an electromagnet 9, a push rod 10, a slider 11, a linear motor II 12, a linear motor I 13, a fixed barrel 14, a rotating arm 15, and a servo motor 16, wherein the warhead 1, fuze body I 2, fuze body II 3, chassis 4, and servo motor frame 5 are arranged in descending order. The upper surface of the fuse body I2 is connected to the spherical concave surface 1b of the projectile 1; a slide 11a is provided on the left side of the junction between the fuse body II3 and the chassis 4; the lower end of the projectile 1 is connected to the upper end of the fuse body I2 via a spherical joint, the lower end of the fuse body I2 is threaded to the upper end of the fuse body II3, the lower end of the fuse body II3 is threaded to the upper end of the chassis 4, and the lower end of the chassis 4 is rotatably slidably connected to the upper end of the servo frame 5; the lower end of the connecting rod 1a of the projectile 1 is connected to the spherical rotor 6. The upper part of the center hole 6a is interference-fitted; the upper end of the rocker arm 7 is threaded to the lower part of the center hole 6a of the ball rotor 6; the upper surface of the ball rotor 6 is connected to the spherical concave surface II2b of the fuse body I2; linear motors I13 and II12 are arranged left and right, with the output ends of both linear motors I13 and II12 facing upwards, and the lower end of linear motor I13 is fixed to the left side of the bottom surface of the chassis 4; the lower end of linear motor II12 is fixed to the right side of the bottom surface of the chassis 4 via the fixed barrel 14; the longitudinal section of the slider 11 is a right triangle with two acute angles of 45°, and the bottom surface of the slider 11 is fixed to the output end of linear motor I13; the right end of the push rod 10 is fixed to the electromagnet 9, the left end of the push rod 10 is slidably connected to the hypotenuse of the right triangle of the slider 11, and the middle part of the push rod 10 is slidably connected to the slide rail 11a at the junction of the fuse body II3 and the chassis 4; the permanent magnet 8 and the electromagnet 9 are on the same horizontal line.

[0008] When the deflection angle θ of the pendulum rod 7 is 6°, the distance x between the permanent magnet 8 and the electromagnet 9 is 3mm, and the deflection angle θ of the pendulum rod 7 and the distance x between the permanent magnet 8 and the electromagnet 9 follow the following relationship:

[0009] The rotating arm 15 is interference-fitted with the rotating arm groove 4b at the lower end of the chassis 4, and the rotating arm 15 is fixedly connected to the output section of the servo motor 16; the annular groove 4a of the chassis 4 is rotatably engaged with the annular flange 5a of the servo motor frame 5, and can rotate freely along the axis.

[0010] The lower end of the projectile 1 is provided with a connecting rod 1a at its center, and the lower end of the projectile 1 is also provided with a spherical concave surface Ⅰ1b.

[0011] The fuse body I2 has a spherical convex surface 2a at the upper end, a spherical concave surface II2b in the middle part, and an internal thread at the lower part.

[0012] The ball rotor 6 is provided with a central hole 6a, and the lower part of the central hole 6a is provided with an internal thread.

[0013] The swing arm 7 consists of an upper rod 7a, a transition rod 7b, and a lower rod 7c. The upper rod 7a, the transition rod 7b, and the lower rod 7c are arranged in order from top to bottom and fixed together. The upper rod 7a has an external thread at its upper end, and the lower rod 7c has a groove 7d at its lower end. The central axes of the upper rod 7a and the lower rod 7c are parallel, and the distance L between the two central axes is 28mm.

[0014] The beneficial effects of this invention are as follows: The electromagnetically driven ballistic correction fuze proposed in this invention can achieve a maximum deflection angle of 6° for the projectile, and can deflect within 360° along the projectile axis. Static analysis of the actuator verifies that it can meet the requirement of resisting an impact of 30,000g. Furthermore, by using Maxwell and Adams software coupled calculations, the air resistance and frictional force between the variant mechanisms when the projectile flies at Mach 1.2 can be calculated. The kinematic characteristics of the fuze under normal conditions are analyzed, and simulation results show that the fuze can complete a deflection of 0–6 degrees within 0.5 ms.

[0015] Compared with other piezoelectric materials and other smart materials, the projectile deflection mechanism of this invention has the advantages of large deflection angle and flexible controllability; and it has the advantage in deflection response time compared with other projectile deflection mechanisms driven by motors. Attached Figure Description

[0016] Figure 1 A perspective view of the ballistic correction fuse device;

[0017] Figure 2 A schematic diagram of the deflection state of a ballistic correction fuze device;

[0018] Figure 3 A cross-sectional view of the ballistic correction fuse device when it is not deflected;

[0019] Figure 4 A partial cross-sectional view of the warhead 1, fuze body I 2, fuze body II 3, and chassis 4 when the ballistic correction fuze device is not deflected;

[0020] Figure 5 This is a cross-sectional view of warhead I;

[0021] Figure 6 This is a cross-sectional view of the fuse body I2;

[0022] Figure 7 A schematic diagram of the slide rail 11a in the fuse body II3 and the chassis 4;

[0023] Figure 8 This is a cross-sectional view of the ball joint rotor 6;

[0024] Figure 9 This is a cross-sectional view of the rocker arm 7;

[0025] Figure 10A partial sectional view of chassis 4 and servo mount 5;

[0026] Figure 11 A cross-sectional view of the ballistic correction fuse device when it deflects;

[0027] Figure 12 A partial cross-sectional view of the warhead deflection when the ballistic correction fuse device deflects;

[0028] Figure 13 This is a schematic diagram of the servo frame 5;

[0029] Figure 14 This is a top view of servo mount 5;

[0030] Among them: 1. Projectile 1a. Connecting rod 1b. Spherical concave surface I 2. Fuze body I 2a. Spherical convex surface 2b. Spherical concave surface II 3. Fuze body II 4. Chassis 4a. Circular groove 4b. Rotating arm groove 5. Servo frame 5a. Circular flange 6. Spherical rotor 6a. Center hole 7. Swing rod 7a. Upper rod 7b. Transition rod 7c. Lower rod 7d. Groove 8. Permanent magnet 9. Electromagnet 10. Push rod 11. Slider 11a. Slide rail 12. Linear motor II 13. Linear motor I 14. Fixed barrel 15. Rotating arm 16. Servo 16a. Screw. Detailed Implementation

[0031] The present invention will now be described in conjunction with the accompanying drawings.

[0032] like Figures 1 to 13 As shown, an electromagnetically driven ballistic correction fuze of the present invention comprises a projectile 1, a fuze body I 2, a fuze body II 3, a chassis 4, a servo motor frame 5, a ball joint rotor 6, a rocker arm 7, a permanent magnet 8, an electromagnet 9, a push rod 10, a slider 11, a linear motor II 12, a linear motor I 13, a fixed barrel 14, a rotating arm 15, and a servo motor 16, wherein the projectile 1, the fuze body I 2, the fuze body II 3, the chassis 4, and the servo motor frame 5 are arranged in order from top to bottom.

[0033] The upper surface of the fuse body I2 is connected to the spherical concave surface 1b of the projectile 1. A slide 11a is provided on the left side of the junction between the fuse body II3 and the chassis 4. The lower end of the projectile 1 is connected to the upper spherical surface of the fuse body I2; the lower end of the fuse body I2 is threaded to the upper end of the fuse body II3; the lower end of the fuse body II3 is threaded to the upper end of the chassis 4; and the lower end of the chassis 4 is rotatably connected to the upper end of the servo frame 5. The lower end of the connecting rod 1a of the projectile 1 is interference-fitted to the upper part of the center hole 6a of the spherical rotor 6; the upper end of the rocker arm 7 is threaded to the lower part of the center hole 6a of the spherical rotor 6. The upper surface of the spherical rotor 6 is connected to the spherical concave surface II2b of the fuse body I2.

[0034] Linear motors I13 and II12 are arranged side-by-side, with their output ends facing upwards. The lower end of linear motor I13 is fixed to the left side of the bottom surface of the chassis 4; the lower end of linear motor II12 is fixed to the right side of the bottom surface of the chassis 4 via a fixing bucket 14. The longitudinal section of slider 11 is a right-angled triangle with two acute angles of 45°. The bottom surface of slider 11 is fixed to the output end of linear motor I13. The right end of push rod 10 is fixed to electromagnet 9, the left end of push rod 10 is slidably connected to the hypotenuse of the right-angled triangle of slider 11, and the middle part of push rod 10 is slidably connected to the slide rail 11a at the junction of fuse body II3 and chassis 4. Permanent magnet 8 and electromagnet 9 are on the same horizontal line.

[0035] When the deflection angle θ of the pendulum rod 7 is 6°, the distance x between the permanent magnet 8 and the electromagnet 9 is 3mm, and the deflection angle θ of the pendulum rod 7 and the distance x between the permanent magnet 8 and the electromagnet 9 follow the following relationship:

[0036] The rotating arm 15 is interference-fitted with the rotating arm groove 4b at the lower end of the chassis 4, and the rotating arm 15 is fixedly connected to the output section of the servo motor 16. The annular groove 4a of the chassis 4 is rotatably engaged with the annular flange 5a of the servo motor frame 5, allowing it to rotate freely along the axis.

[0037] The lower end of the projectile 1 is provided with a connecting rod 1a at its center, and the lower end of the projectile 1 is also provided with a spherical concave surface Ⅰ1b.

[0038] The fuse body I2 has a spherical convex surface 2a at the upper end, a spherical concave surface II2b in the middle part, and an internal thread at the lower part.

[0039] The ball rotor 6 is provided with a central hole 6a, and the lower part of the central hole 6a is provided with an internal thread.

[0040] The swing arm 7 consists of an upper rod 7a, a transition rod 7b, and a lower rod 7c. The upper rod 7a, the transition rod 7b, and the lower rod 7c are arranged in order from top to bottom and fixed together. The upper rod 7a has an external thread at its upper end, and the lower rod 7c has a groove 7d at its lower end. The central axes of the upper rod 7a and the lower rod 7c are parallel, and the distance L between the two central axes is 28mm.

[0041] Example

[0042] When the deflection angle of the warhead 1 of the ballistic correction fuse is 0° and the deflection azimuth angle is 0°, the fuse is in the initial state; when either the deflection angle of the warhead 1 or the deflection azimuth angle of the ballistic correction fuse is not 0°, the fuse is said to be in the deflection state.

[0043] like Figures 1 to 10As shown, this embodiment of an electromagnetically driven ballistic correction fuze consists of a projectile deflection assembly, a fuze full-circumference rotation assembly, and a fuze fixing assembly. The projectile deflection assembly includes a projectile 1, a fuze body I 2, a fuze body II 3, a chassis 4, a ball-and-ball rotor 6, a rocker arm 7, a permanent magnet 8, an electromagnet 9, a push rod 10, a slider 11, and a linear motor II 12. Linear motor I13 pushes slider 11 to move up and down in a rectangular slot within chassis 4, and pushes push rod 10 to slide left and right in slide rail 11a at the junction of fuze body II3 and chassis 4. The attraction between electromagnet 9 fixed to the right end of push rod 10 and permanent magnet 8 fixed to lower rod 7c of swing rod 7 causes swing rod 07 and projectile 01, which are threadedly connected to ball rotor 6, to deflect freely and controllably in one direction. The fuze full-circumference rotation assembly includes chassis 4, servo frame 5, rotating arm 15, and servo 16. Servo 16, fixed within servo frame 5 by servo mounting screw 16a, drives the rotating arm at the lower end of chassis 4. The rotating arm 15, which is interference-fitted with the groove 4b, drives the chassis 4 and the projectile 1, fuse body I 2, and fuse body II 3 fixed thereto to rotate, thereby coupling with the projectile deflection assembly to achieve full circumferential deflection; the fuse fixing assembly includes the chassis 4, the swing arm 7, the linear motor II 12, and the fixing barrel 14. The lower end of the linear motor II 12 is fixed to the right side of the bottom surface of the chassis 4 via the fixing barrel 14, and its protruding shaft is connected to the groove 7d at the lower end of the swing arm 7, ensuring that the projectile is not affected by factors such as vibration during launch and complex electromagnetic conditions during the initial flight stage when deflection is not required, and keeping the initial angle of the projectile unchanged.

[0044] like Figures 11 to 14 As shown, the working principle of this invention is as follows: During normal flight of the projectile, the extension shaft of linear motor II 12 connects to the groove 7d at the lower end of the swing arm 7, fixing the projectile and preventing it from deflecting; this is the locked state of the swing arm 7. When the projectile needs trajectory correction, the trajectory correction fuze receives a deflection signal. The servo motor 16 drives the rotating arm 15 to rotate the projectile 1, fuze body I 2, and fuze body II 3 along the axis to the specified deflection azimuth angle α. Linear motor I 13 drives the slider 11 to move up and down, pushing the push rod 10 and the electromagnet 9 to move left and right to a position relative to the undeflected state. At a distance x from magnet 8, electromagnet 9 is energized, and the extension shaft of linear motor II 12 exits the groove 7d at the lower end of swing arm 7. Permanent magnet 8, fixed on the lower rod 7c of swing arm 7, instantly attracts electromagnet, driving swing arm 7, and in turn driving projectile 1 to deflect to a specified deflection angle θ around the spherical pair formed by the upper surface of spherical rotor 6 and the spherical concave surface 2b of fuse body I 2. During the subsequent movement of the projectile, linear motor I 13 and servo motor 16 are coupled to achieve deflection of azimuth angle from 0 to 360° along the projectile axis, and deflection at any angle within the range of 0 to 6°.

[0045] Taking the trajectory correction fuse's warhead 1 deflecting from a deflection angle of 0° and a deflection azimuth angle of 0° to a deflection angle of 6° and a deflection azimuth angle of 120° as an example, when the lever 7 is in the initial state, the warhead 1 deflects at a deflection angle of 0° and a deflection azimuth angle of 0°, and the lever 7 is in the locked state. When the warhead 1 of the trajectory correction fuse needs to deflect, the trajectory correction fuse receives a deflection signal, and the servo motor 16 drives the rotating arm 15 to rotate the warhead 1, the fuse body I 2, and the fuse body II 3 along the axis to the specified deflection azimuth angle α = 120°. The linear motor I... 13 Drive slider 11 to move up and down, push push rod 10 and electromagnet 9 to move left and right to a position x = 3mm away from permanent magnet 8 in the undeflected state. Electromagnet 9 is energized, the extension shaft of linear motor II 12 exits the groove 7d at the lower end of swing rod 7, releases the locked state of swing rod 7, and permanent magnet 8 fixed on the lower rod 7c of swing rod 7 is instantly attracted to electromagnet, driving swing rod 7, and then driving projectile 1 to deflect to the specified deflection angle θ = 6° with the spherical pair formed by the upper surface of spherical rotor 6 and the spherical concave surface 2b of fuse body I 2 as the center.

Claims

1. An electromagnetically driven ballistic correction fuze, characterized in that, Composed of a warhead (1), a fuse body I (2), and a fuse body It consists of II (3), chassis (4), servo frame (5), ball joint rotor (6), rocker arm (7), permanent magnet (8), electromagnet (9), push rod (10), slider (11), linear motor II (12), linear motor I (13), fixed barrel (14), rotating arm (15), and servo motor (16). The projectile (1) has a connecting rod (1a) at the center of its lower end, and a spherical concave surface I (1b) at the lower end of the projectile (1); the fuse body I (2) has a spherical convex surface (2a) at its upper end, a spherical concave surface II (2b) in the middle of the fuse body I (2), and an internal thread at the lower part of the fuse body I (2); the ball rotor (6) has a central hole (6a) on its upper end, and an internal thread at the lower part of the central hole (6a); the swing rod (7) is composed of an upper rod (7a), a transition rod (7b) and a lower rod (7c), which are arranged and fixed from top to bottom; the upper rod (7a) has an external thread at its upper end, and the lower rod (7c) has a groove (7d) at its lower end; the extension shaft of the linear motor II (12) is connected to the swing rod (7a). The lower end groove (7d) is connected to ensure that the initial angle of the projectile remains unchanged during the initial flight phase when no deflection is required; the central axes of the upper rod (7a) and the lower rod (7c) are parallel, and the distance L between the two central axes is 28mm; among them, the projectile (1), fuse body I (2), fuse body II (3), chassis (4) and servo mount (5) are arranged in order from top to bottom; the spherical convex surface (2a) on the upper surface of fuse body I (2) is connected to the spherical concave surface I (1b) of the projectile (1); a slide (11a) is provided on the left side of the junction of fuse body II (3) and chassis (4); the lower end of the projectile (1) is connected to the upper end of the spherical joint of fuse body I (2), and the lower end of fuse body I (2) is connected to the upper end of the spherical joint of the fuse body I (2). The upper end of the fuse body II (3) is threaded, and the lower end of the fuse body II (3) is threaded to the upper end of the chassis (4). The lower end of the chassis (4) is slidably connected to the upper end of the servo frame (5). The lower end of the connecting rod (1a) of the projectile (1) is interference-fitted to the upper part of the center hole (6a) of the ball rotor (6). The upper end of the rocker arm (7) is threaded to the lower part of the center hole (6a) of the ball rotor (6). The upper surface of the ball rotor (6) is connected to the spherical concave surface II (2b) of the fuse body I (2). Linear motor I (13) and linear motor II (12) are arranged left and right, with the output ends of linear motor I (13) and linear motor II (12) facing upwards. The lower end of linear motor I (13) is fixed to the chassis (4). The bottom left side of the base; the lower end of the linear motor II (12) is fixed to the bottom right side of the base (4) via the fixed bucket (14); the longitudinal section of the slider (11) is a right triangle with two acute angles of 45°, and the bottom surface of the slider (11) is fixed to the output end of the linear motor I (13); the right end of the push rod (10) is fixed to the electromagnet (9), the left end of the push rod (10) is slidably connected to the hypotenuse of the right triangle of the slider (11), and the middle part of the push rod (10) is slidably connected to the slide (11a) at the junction of the fuse body II (3) and the base (4); the permanent magnet (8) is fixed between the lower rod (7c) and the groove (7d) of the swing rod (7), and the permanent magnet (8) and the electromagnet (9) are on the same horizontal line; When the deflection angle θ of the pendulum (7) is 6°, the distance x between the permanent magnet (8) and the electromagnet (9) is 3mm, and the deflection angle θ of the pendulum (7) and the distance x between the permanent magnet (8) and the electromagnet (9) follow the same relationship. ; The rotating arm (15) is interference-fitted with the rotating arm groove (4b) at the lower end of the chassis (4), and the rotating arm (15) is fixedly connected to the output section of the servo motor (16); the annular groove (4a) of the chassis (4) is rotatably engaged with the annular flange (5a) of the servo motor frame (5), and can rotate freely along the axis.

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