A method for evaluating the effectiveness of helicopter cockpit armor protection

Abstract

The present invention discloses a method for evaluating the effectiveness of helicopter cockpit armor protection, including: determining the level of disability after different parts of the human body are damaged; calculating the probability of human body damage in the typical position by projecting the human body and the cockpit armor in the typical position; drawing a human body damage probability distribution diagram in combination with the missile-target intersection condition, and evaluating different cockpit armor protection schemes by comparison. The method of the present invention can realize the quantitative evaluation of the effectiveness of helicopter cockpit armor protection, and provide a reference for the design of helicopter cockpit survivability.

Description

Technical Field

[0001] The invention relates to the field of helicopter structural design, and in particular to a method for evaluating the armor protection effectiveness of a helicopter cockpit. The method evaluates the armor protection effectiveness of the cockpit by calculating the probability of pilot injury in different directions. Background Art

[0002] With the development of modern battlefield confrontation methods, the combat environment of helicopters is becoming increasingly harsh. Installing bulletproof armor in the cockpit is an effective means to improve the battlefield survivability of pilots. Mainstream military helicopters at home and abroad are equipped with bulletproof armor in the cockpit for pilot protection, but military helicopters are very sensitive to weight. How to provide the greatest protection for personnel within a limited protection area has always been an important issue in helicopter survivability design.

[0003] Domestic helicopter survivability design started late and lacks relevant technical literature and standards. In addition, due to the complexity of the battlefield environment, bulletproof armor is mostly laid out based on experience and aircraft layout limitations, and there is a lack of quantitative evaluation means and methods. Summary of the invention

[0004] The purpose of the present invention is to provide a method for evaluating the effectiveness of helicopter cockpit armor protection, so as to solve the problem that there is a lack of quantitative evaluation means and methods for the effectiveness of helicopter cockpit bulletproof armor.

[0005] In order to achieve the above tasks, the present invention adopts the following technical solutions:

[0006] A helicopter cockpit armor protection effectiveness evaluation method, comprising:

[0007] Determine the degree of disability after injury to different parts of the human body;

[0008] The probability of human injury in a typical position is calculated by projecting the human body and cockpit armor in that position;

[0009] The probability distribution diagram of human injury is drawn in combination with the missile-target intersection conditions, and different cockpit armor protection schemes are evaluated through comparison.

[0010] Furthermore, the determination of the disability level after injury to different parts of the human body includes:

[0011] The human body is divided into zones based on human anatomy and the correlation between different body parts of the pilot and helicopter control. In each zone, the disability level of different body parts is set according to their correlation with helicopter control.

[0012] Furthermore, the disability level is divided into 4 levels:

[0013] Level 1 or mild disability: refers to a mild loss of physical function, but does not affect the execution of combat missions;

[0014] Level 2 or moderate disability: refers to moderate loss of physical function, which affects the execution of combat missions, but continuing the mission does not threaten the pilot's life;

[0015] Level 3 or severe disability: refers to severe loss of physical function, which affects the execution of combat missions and continuing the mission will threaten the pilot's life;

[0016] Level 4 or total incapacitation: refers to the complete loss of body functions, which directly threatens the pilot's life.

[0017] Furthermore, the calculation of the probability of human body injury at a typical position by projecting the human body and the cockpit armor at the typical position includes:

[0018] The XZ plane, YZ plane and XY plane of the helicopter are respectively used as reference planes, and the motion envelope of the pilot in the driving state and the cockpit bulletproof armor under the current helicopter cockpit armor protection scheme are projected on each reference plane of the helicopter respectively; in each projection direction, the minimum envelope rectangle of the pilot is established, so as to obtain the minimum envelope rectangle of the pilot and the projection of the cockpit bulletproof armor on each reference plane;

[0019] On each reference plane, the attack angle of the projectile is simulated every 15°, and the injury probability of the driver at each level of disability after each projectile attacks the driver within the range of 0-360° is calculated.

[0020] Furthermore, the minimum envelope rectangle includes the maximum motion range of the driver under typical maneuvers.

[0021] Furthermore, the calculation of the injury probability of each disability level of the driver after each projectile in the range of 0-360° attacks the driver includes:

[0022] The minimum enveloping rectangle on each reference plane and the projection of the cockpit bulletproof armor are jointly divided into m×n grids. In a simulated manner, it is determined which grids will be damaged after each projectile attacks the cockpit, and the number of damaged grids that are damaged is counted; then, based on the correspondence between the grids and the driver's body parts, the number of damaged grids at each disability level is counted, and the ratio of this number to the total number of grids is the damage probability of the disability level on the reference plane.

[0023] Furthermore, if the mesh hit by the projectile is a mesh within the projection of the cockpit bulletproof armor, it will not be counted in the number of damaged meshes.

[0024] Furthermore, the human body injury probability distribution diagram is drawn in combination with the missile-target intersection condition, and different cockpit armor protection schemes are evaluated by comparison, including:

[0025] Draw the injury probability distribution diagrams of each pilot disability level in the helicopter XZ plane, YZ plane, and XY plane respectively;

[0026] For different helicopter cockpit armor protection schemes, the damage probability distribution diagrams of each disability level of each reference surface are obtained respectively, and then different cockpit armor protection schemes are evaluated and selected through comparison.

[0027] Compared with the prior art, the present invention has the following technical features:

[0028] The method of the invention can realize the quantitative evaluation of the armor protection effectiveness of the helicopter cockpit and provide a reference for the survivability design of the helicopter cockpit. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is the degree of disability after injury to different parts of the human body;

[0030] Figure 2 It is the probability distribution diagram of the injury on the left side of the human body;

[0031] Figure 3 It is a schematic diagram of the orientation of the XZ plane in one embodiment;

[0032] Figure 4 A schematic diagram of the orientation of the YZ plane in one embodiment;

[0033] Figure 5 A schematic diagram of the orientation of the XY plane in one embodiment;

[0034] Figure 6 is the damage probability at different positions in the XZ plane in one embodiment;

[0035] Figure 7 is the damage probability at different positions in the YZ plane in one embodiment;

[0036] Figure 8 It is the damage probability at different positions in the XY plane in one embodiment. DETAILED DESCRIPTION

[0037] The present invention provides a helicopter cockpit armor protection effectiveness evaluation method, which first determines the disability level after different parts of the human body are damaged; then the human body and the cockpit armor are projected in a typical position to calculate the human body damage probability in the position; finally, a human body damage probability distribution diagram is drawn in combination with the missile-target intersection condition, and different cockpit armor protection schemes are evaluated by comparison; the specific steps are as follows:

[0038] Step 1: Divide the human body into different zones based on human anatomy and the correlation between different body parts of the pilot and helicopter control. In each zone, set the disability level of different body parts according to their correlation with helicopter control. For example, in the process of controlling the heading of the helicopter, body parts related to the legs are mainly used, so the key joints of the legs, such as the knee joints and ankles, are set to a higher disability level; while for parts such as the calves and feet that can barely complete the operation even in a disabled state, a lower disability level can be set.

[0039] In this step, disability means that due to injury to a part of the body on the battlefield, the combatant temporarily loses or completely loses normal functions, thus losing a certain degree of combat effectiveness. Disability levels are divided into 4 levels:

[0040] Level 1 or mild disability: refers to a mild loss of physical function, but does not affect the execution of combat missions;

[0041] Level 2 or moderate disability: refers to moderate loss of physical function, which affects the execution of combat missions, but continuing the mission does not threaten the pilot's life;

[0042] Level 3 or severe disability: refers to severe loss of physical function, which affects the execution of combat missions and continuing the mission will threaten the pilot's life;

[0043] Level 4 or total incapacitation: refers to the complete loss of body functions, which directly threatens the pilot's life.

[0044] Step 2, taking the XZ plane, YZ plane, and XY plane of the helicopter as reference planes respectively, projecting the motion envelope of the pilot in the driving state and the cockpit bulletproof armor under the current helicopter cockpit armor protection scheme on each reference plane of the helicopter respectively; in each projection direction, establishing the minimum envelope rectangle of the pilot, the minimum envelope rectangle includes the maximum motion range of the pilot under typical control actions, thereby obtaining the minimum envelope rectangle of the pilot and the projection of the cockpit bulletproof armor on each reference plane.

[0045] Step 3, on each reference plane, simulate the attack angle of the projectile every 15°, and calculate the injury probability of the driver at each level of disability after each projectile attacks the driver within the range of 0-360°.

[0046] Specifically, the minimum envelope rectangle on each reference plane and the projection of the cockpit bulletproof armor are divided into m×n grids, and the grids that will be damaged after each projectile attacks the cockpit are determined in a simulated manner, and the number of damaged grids that are damaged is counted, wherein, if the grid attacked by the projectile belongs to the grid within the projection of the cockpit bulletproof armor, it is not counted in the number of damaged grids; then, according to the correspondence between the grid and the driver's body parts and step 1, the number of damaged grids at each disability level is counted, and the ratio of this number to the total number of grids is the damage probability of the disability level on the reference plane. Among them, the X direction of the helicopter is the heading, the Z direction is the vertical upward direction, and the Y direction is perpendicular to the X direction and the Z direction.

[0047] Step 4, draw the injury probability distribution diagrams of each pilot disability level in the helicopter XZ plane, YZ plane, and XY plane respectively;

[0048] Step 5: For different helicopter cockpit armor protection schemes, use the methods of steps 1 to 4 to obtain the damage probability distribution diagram of each disability level of each reference surface, and then evaluate and select different cockpit armor protection schemes through comparison.

[0049] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A method for evaluating the armor protection effectiveness of a helicopter cockpit, characterized in that: include: Determine the degree of disability after injury to different parts of the human body; The probability of human injury in a typical position is calculated by projecting the human body and cockpit armor in that position; Draw a human injury probability distribution diagram based on the missile-target intersection conditions, and evaluate different cockpit armor protection schemes by comparison; Wherein, the determination of the disability level after injury to different parts of the human body includes: The human body is divided into different zones based on human anatomy and the correlation between different body parts of the pilot and helicopter control. In each zone, the disability level of different body parts is set according to the correlation with helicopter control. The method of calculating the probability of human body injury at a typical position by projecting the human body and the cockpit armor at the typical position includes: The XZ plane, YZ plane and XY plane of the helicopter are respectively used as reference planes, and the motion envelope of the pilot in the driving state and the cockpit bulletproof armor under the current helicopter cockpit armor protection scheme are projected on each reference plane of the helicopter respectively; in each projection direction, the minimum envelope rectangle of the pilot is established, so as to obtain the minimum envelope rectangle of the pilot and the projection of the cockpit bulletproof armor on each reference plane; the minimum envelope rectangle includes the maximum motion range of the pilot under typical control actions; On each reference plane, the probability of injury to the driver at each level of incapacitation after each projectile attacks the driver within the range of 0-360° is calculated at every 15° simulated projectile attack angle; The calculation of the injury probability of each level of incapacitation of the driver after each projectile in the range of 0-360° attacks the driver includes: The minimum enveloping rectangle on each reference plane and the projection of the cockpit bulletproof armor are jointly divided into m×n grids. In a simulated manner, it is determined which grids will be damaged after each projectile attacks the cockpit, and the number of damaged grids that are damaged is counted; then, based on the correspondence between the grids and the driver's body parts, the number of damaged grids at each disability level is counted, and the ratio of this number to the total number of grids is the damage probability of the disability level on the reference plane.

2. The helicopter cockpit armor protection effectiveness evaluation method according to claim 1 is characterized in that: There are 4 levels of disability: Level 1 or mild disability: refers to a mild loss of physical function, but does not affect the execution of combat missions; Level 2 or moderate disability: refers to moderate loss of physical function, which affects the execution of combat missions, but continuing the mission does not threaten the pilot's life; Level 3 or severe disability: refers to severe loss of physical function, which affects the execution of combat missions and continuing the mission will threaten the pilot's life; Level 4 or total incapacitation: refers to the complete loss of body functions, which directly threatens the pilot's life.

3. The helicopter cockpit armor protection effectiveness evaluation method according to claim 1 is characterized in that: If the mesh hit by the projectile is within the projection of the cockpit bulletproof armor, it will not be counted in the number of damaged meshes.

4. The helicopter cockpit armor protection effectiveness evaluation method according to claim 1 is characterized in that: The method of drawing a human injury probability distribution diagram in combination with the missile-target intersection condition and evaluating different cockpit armor protection schemes by comparison includes: Draw the injury probability distribution diagrams of each pilot disability level in the helicopter XZ plane, YZ plane, and XY plane respectively; For different helicopter cockpit armor protection schemes, the damage probability distribution diagrams of each disability level of each reference surface are obtained respectively, and then different cockpit armor protection schemes are evaluated and selected through comparison.

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