Projectile attitude testing device based on accelerometer array

Abstract

The application discloses a projectile attitude testing device based on an accelerometer array, and aims to improve the precision and reliability of projectile attitude testing in a high-overload environment. The application comprises a storage circuit, an accelerometer array and a mounting protection device, and the projectile attitude is calculated through the output signals of the accelerometer array, so that the data precision and reliability are improved. The application has the advantages of compact structure, high anti-overload capacity and high-precision testing data in a complex environment, and can provide reliable support for the design optimization of modern weapon systems.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of projectile attitude testing, and particularly relates to a projectile attitude testing device based on an accelerometer array. BACKGROUND

[0002] Projectile attitude testing is one of the key technologies for improving the performance of modern weapon equipment. Projectile attitude testing can significantly improve trajectory accuracy and target hit rate, optimize flight control systems, enhance the adaptability of the system to complex environments, reduce system dependence and cost, and improve overall safety. Therefore, accurate measurement of projectile attitude is of great significance for the design and optimization of equipment in the fields of modern weapon systems and aerospace.

[0003] Traditional attitude measurement methods rely mainly on gyroscopes and other inertial sensors. However, these methods have significant limitations in high-g environments. Gyroscopes are prone to failure under severe impact, resulting in inaccurate measurement data and failing to meet the needs of high-precision testing. In addition, existing testing devices often have complex structures, making it difficult to achieve effective anti-interference and data protection in practical applications. The lack of attitude data of projectiles in high-g environments has seriously hindered the rapid development of modern weapon systems. Therefore, it is urgent to conduct in-depth research on the attitude testing technology of projectiles in high-g environments

[0004] CN103411613A discloses a "projectile-borne penetration attitude solving device based on a combination of geomagnetic / micro-inertial information". The projectile-borne penetration attitude solving device mainly consists of a geomagnetic / micro-inertial measurement combination unit, a storage solving unit, and a buffer protection device. The projectile attitude is obtained by solving the information collected by the three-axis gyroscope and three-axis geomagnetic sensor. Currently, the anti-high-g three-axis gyroscope technology is not mature, and there may be failure problems during testing, affecting the reliability and stability of the test. The buffer protection device uses multi-layer foam metal buffering, which has poor reusability, and the wiring hole position has no special protection. The cable is prone to breakage when impacted. SUMMARY

[0005] The present application provides a projectile attitude testing device based on an accelerometer array, aiming to solve the challenges brought by transient high-g effects during the launch and flight of projectiles, especially the applicability problems faced by current commonly used attitude measurement technologies in this case.

[0006] The technical solution of the application is: a projectile attitude testing device based on an accelerometer array, comprising a storage circuit, an accelerometer array, and a mounting protection device; the mounting protection device comprises a shell, a front end cover, a rear end cover, a data line cover plate, an inner cylinder, an inner cylinder end cover, and a plurality of struts; the shell is a rotary body, composed of three cylindrical sections with increasing outer diameters from front to back, namely a first cylinder, a second cylinder, and a third cylinder, with the second cylinder used to fixedly connect to the tail of the projectile; a partition ring is arranged between the first cylinder and the second cylinder, two triaxial acceleration sensors with the same diameter are arranged in the first cylinder, the front end cover is fixed to the front end face of the first cylinder, the inner cylinder is connected to the rear end face of the partition ring through a plurality of struts, the storage circuit is arranged in the inner cylinder, the inner cylinder end cover is fixedly connected to the rear end face of the inner cylinder, the rear end cover is fixedly connected to the third cylinder, the remaining two triaxial acceleration sensors with the same diameter are fixed to the front end face of the rear end cover, a gap is left between the triaxial acceleration sensors and the inner cylinder end cover, three-order holes with decreasing diameters are opened along the central axis of the rear end cover from back to front, namely a first-order hole, a second-order hole, and a third-order hole, the second-order hole is used to store data lines, the data line cover plate is fixedly connected to the first-order hole, and the third-order hole is used for wiring; the shell, the inner cylinder, and the inner cylinder end cover are all provided with wiring holes, the cables of the four triaxial acceleration sensors are connected to the storage circuit through the wiring holes, and the data reading lines are led from the storage circuit to the second-order hole through the wiring holes.

[0007] Compared with the prior art, the application has the following advantages:

[0008] (1) The application uses an accelerometer array to accurately test the attitude of the projectile, effectively overcoming the limitation that traditional gyroscopes are prone to failure in a high overload environment, and improving the reliability and accuracy of the testing device.

[0009] (2) The testing device is simple in design and compact in structure, and the double-layer potting technology significantly enhances the protection of the internal storage circuit, effectively resisting the damage of shock waves, while ensuring the stability and reliability of the internal circuit connection.

[0010] (3) The wiring inside the testing device is along the central axis, which shortens the cable length, and the internal potting integration processing and external design of data lines enable multiple writing and reading of data, enhancing the protection and reusability of the device, and adapting to variable testing environments and requirements. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 The figure is a structural diagram of the testing device of the application.

[0012] Figure 2 The figure is a schematic diagram of the accelerometer array of the application. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0014] It should be noted that all directional indications, such as up, down, left, right, front, back, etc., in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0015] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited.

[0016] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixing" and the like should be understood in a broad sense, for example, "fixing" can be fixed connection, or detachable connection, or integral; "connection" can be mechanical connection, or electrical connection. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0017] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the fact that a person of ordinary skill in the art can realize it, and when the technical solutions are combined with each other, they are mutually contradictory or cannot be realized, it should be considered that the combination of the technical solutions does not exist, and is not within the scope of protection required by the present application.

[0018] The specific implementation, technical difficulties and points of the present application will be further introduced below in combination with the design examples.

[0019] The present application provides a projectile attitude test device based on an accelerometer array, which aims to solve the challenge brought by the transient high overload effect of the projectile in the process of launching and flying, especially the applicability problem faced by the current commonly used attitude measurement technology in this case.

[0020] In combination with Figure 1 A projectile attitude test device based on an accelerometer array, comprising a storage circuit 10, an accelerometer array 6 and a mounting protection device.

[0021] The mounting protection device comprises a shell 2, a front end cover 3, a rear end cover 4, a data line cover plate 5, an inner cylinder 8, an inner cylinder end cover 9 and a plurality of struts 7. The shell 2 is a rotary body, which is composed of three cylinders with increasing outer diameters from front to back, namely a first cylinder, a second cylinder and a third cylinder. The outer wall of the second cylinder is provided with threads for cooperation and fixed connection with the tail of the projectile 1. A partition ring is arranged between the first cylinder and the second cylinder. Two three-axis acceleration sensors with the same diameter are arranged in the first cylinder. The front end cover 3 is fixed on the front end face of the first cylinder by threads. The inner cylinder 8 is connected to the rear end face of the partition ring through a plurality of struts 7. The storage circuit 10 is arranged in the inner cylinder 8. The inner cylinder end cover 9 is fixedly connected with the rear end face of the inner cylinder 8. The rear end cover 4 is fixedly connected with the third cylinder by eight bolts. The remaining two three-axis acceleration sensors are fixed on the front end face of the rear end cover 4. There is a gap between the three-axis acceleration sensors and the inner cylinder end cover 9. A three-step hole with decreasing diameters is formed along the central axis of the rear end cover 4 from back to front, namely a first step hole, a second step hole and a third step hole. The second step hole is used for storing data lines. The data line cover plate 5 is fixedly connected with the first step hole by four bolts. The third step hole is used for wiring. The shell 2, the inner cylinder 8 and the inner cylinder end cover 9 are all provided with wiring holes. The cables of the four three-axis acceleration sensors are connected to the storage circuit 10 through the wiring holes. The data reading line is led from the storage circuit 10 to the second step hole through the wiring hole. This design shortens the wiring stroke and facilitates data reading and input.

[0022] The accelerometer array 6 comprises four three-axis acceleration sensors which are cross-distributed at the center of the assembly, as shown in Figure 2 The positions and directions of the four three-axis acceleration sensors in the accelerometer array 6 are represented by A1, A2, …, A12. The directions of the three axes of each three-axis acceleration sensor are perpendicular to each other. The distance between the measurement centers of the two three-axis acceleration sensors on the rear end cover 4 is the diameter of a circle, which is l. The directions of two axes of each three-axis acceleration sensor on the rear end cover 4 coincide with two adjacent sides of a square inscribed in the circle. The direction of the third axis of each three-axis acceleration sensor is perpendicular to the directions of the other two axes. The inner square is projected onto the front end face of the partition ring from back to front along the central axis of the shell 2 to form a projection square. The positions of the measurement centers of the two three-axis acceleration sensors in the first cylinder coincide with the opposite corners of the projection square. The radial directions of the two three-axis acceleration sensors in the first cylinder and the radial directions of the two three-axis acceleration sensors on the rear end cover 4 are in different planes and perpendicular to each other. The directions of two axes of each three-axis acceleration sensor in the first cylinder coincide with two adjacent sides of the projection square. The direction of the third axis of each three-axis acceleration sensor is perpendicular to the directions of the other two axes. The distance between the front end face of the partition ring and the front end face of the rear end cover 4 is L, and L≥l.

[0023] This specific sensor arrangement has the significant advantage of a compact structure and effectively reduces the impact of sensor output errors on the calculated attitude, thereby improving the accuracy and reliability of the test data.

[0024] The protective device is installed and fixedly connected to the tail of the projectile 1 to form an assembly. By adjusting the counterweight, the center of mass of the assembly is made to coincide with the midpoint of the line connecting the center of the inscribed square and the center of the projected square.

[0025] To enhance the internal circuit's overload resistance, the present invention employs a double-layer potting process, encompassing both the interior of inner tube 8 and the area between inner tube 8 and outer shell 2. This effectively resists various external shocks and overloads, ensuring the stability and reliability of the circuit testing system under extreme conditions. This design not only protects against transient high overloads in a variety of complex environments, but also significantly enhances the accuracy of the projectile during posture testing.

Claims

1. A projectile attitude test device based on an accelerometer array, characterized by: It includes a storage circuit (10), an accelerometer array (6), and a mounting protection device; The installation protection device comprises an outer shell (2), a front end cover (3), a rear end cover (4), a data line cover plate (5), an inner cylinder (8), an inner cylinder end cover (9) and a plurality of pillars (7); the outer shell (2) is a rotating body, and is composed of three sections of cylinders with increasing outer diameters from front to back, namely the first cylinder, the second cylinder and the third cylinder, and the second cylinder is used to fix the tail of the elastic body (1); a spacer ring is provided between the first cylinder and the second cylinder, and two triaxial acceleration sensors with a common diameter are installed in the first cylinder, the front end cover (3) is fixed to the front end face of the first cylinder, the front of the inner cylinder (8) is connected to the rear end face of the spacer ring through a plurality of pillars (7), a storage circuit (10) is installed in the inner cylinder (8), and the inner cylinder end cover (9) is connected to the rear end face of the inner cylinder (8). The end faces are fixedly connected, the rear end cover (4) is fixedly connected to the third cylinder, and the remaining two triaxial acceleration sensors arranged with the same diameter are fixed on the front face of the rear end cover (4). A gap is left between the triaxial acceleration sensor and the inner cylinder end cover (9). Three-step holes with decreasing diameters are opened from back to front along the central axis of the rear end cover (4), which are the first step hole, the second step hole and the third step hole in sequence. The second step hole is used to store the data line, the data line cover (5) is fixedly connected to the first step hole, and the third step hole is used for wiring. The outer shell (2), the inner cylinder (8) and the inner cylinder end cover (9) are all provided with wiring holes. The four triaxial acceleration sensor cables are connected to the storage circuit (10) through the wiring holes, and the data reading line is led from the storage circuit (10) to the rear second step hole through the wiring holes.

2. The projectile attitude testing device based on an accelerometer array according to claim 1, characterized in that: The accelerometer array (6) includes four triaxial acceleration sensors cross-distributed at the mass center of the assembly, and the three axis directions of each triaxial acceleration sensor are perpendicular to each other.

3. The projectile attitude testing device based on an accelerometer array according to claim 2, characterized in that: A perfect circle is drawn with the distance between the measurement centers of the two three-axis acceleration sensors on the rear end cover (4) as the diameter, the directions of the two axes of each of the two three-axis acceleration sensors on the rear end cover (4) coincide with the two adjacent sides of the square inscribed in the perfect circle, and the direction of the third axis of each three-axis acceleration sensor is perpendicular to the directions of the other two axes; the inscribed square is projected from back to front along the central axis direction of the housing (2) to the front end face of the spacer ring to form a projected square; the test center positions of the two three-axis acceleration sensors in the first cylinder coincide with the diagonal vertices of the projected square, the radial directions of the two three-axis acceleration sensors in the first cylinder and the radial directions of the two three-axis acceleration sensors on the rear end cover (4) are in a non-planar perpendicular relationship, the directions of the two axes of each of the two three-axis acceleration sensors in the first cylinder coincide with the two adjacent sides of the projected square, and the direction of the third axis of each three-axis acceleration sensor is perpendicular to the directions of the other two axes.

4. The projectile attitude testing device based on an accelerometer array according to claim 3, characterized in that: The protective device is installed and fixedly connected with the tail of the projectile (1) to form an assembly. By adjusting the counterweight, the center of mass of the assembly is made to coincide with the midpoint of the line connecting the inscribed square and the center of the projected square.

5. The projectile attitude testing device based on an accelerometer array according to claim 4, characterized in that: In order to enhance the overload resistance of the internal circuit, a double-layer potting treatment is performed on the interior of the inner cylinder (8) and the area between the inner cylinder (8) and the outer shell (2) using potting glue, which can effectively resist the influence of various external impacts and overload phenomena, and ensure the stability and reliability of the circuit test system under extreme conditions.

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