A calculation method for the arming time of a projectile fuze based on target characteristics

Abstract

The calculation method of the fuze setting time of a projectile based on target characteristics according to the present disclosure determines the fuze setting method of the projectile according to the motion characteristics of the strike target relative to the projectile; calculates the delay time of the fuze setting system of the projectile according to the fuze setting method and the projectile strike target parameters; calculates the flight time of the projectile by using a firing table approximation algorithm and the system delay time of the fuze setting system of the projectile; and calculates the fuze time of the projectile according to the flight time of the projectile and the in-bore time of the projectile. It can accurately calculate the fuze setting time of projectiles facing different types of strike targets and improve the accuracy of airburst of projectiles.

Description

Technical Field

[0001] The present invention belongs to the technical field of shipborne non-lethal rockets, and particularly relates to a method for calculating the arming time of a projectile fuse based on target characteristics. Background Art

[0002] The shipborne non-lethal weapon system is mainly installed on coast guard law enforcement ships with a displacement of over 300 tons. Through functions such as reconnaissance, three-dimensional coordinate formation, fire control solution, and firing command issuance, and by using a combined action method of non-lethal ammunition and acoustic deterrence, it achieves the effect of non-lethal disposal of targets such as maritime infringement and illegal vessels, including warning, deterrence, prevention, and expulsion.

[0003] A non-lethal weapon refers to a specialized weapon that can temporarily incapacitate personnel without depriving their lives or render equipment and facilities non-functional when used safely according to law. Common lethal weapons mainly eliminate targets through explosion, penetration, and fragmentation, while non-lethal weapons mainly use means other than physical destruction to prevent targets from functioning. Lethal weapons, as a hard-kill force, can ensure the strength of defense against the enemy, while non-lethal weapons can also effectively deter and suppress the enemy without causing permanent harm to the other party, thus avoiding unnecessary litigation and disputes.

[0004] In non-lethal strikes, the airburst of timed fuses of rockets such as rubber balls and flash bangs is a crucial link, and the accuracy of the fuse time is related to the accuracy of the rocket airburst. Summary of the Invention

[0005] The present invention overcomes one of the deficiencies of the prior art and provides a method for calculating the arming time of a projectile fuse based on target characteristics, which can set the arming time of projectiles for different types of strike targets and improve the accuracy of projectile airburst.

[0006] According to one aspect of the present disclosure, the present invention provides a method for calculating the arming time of a projectile fuse based on target characteristics, the method comprising:

[0007] Determining the fuse arming method of the projectile according to the motion characteristics of the strike target relative to the projectile;

[0008] Calculating the delay time of the projectile fuse arming system according to the fuse arming method and the projectile strike target parameters;

[0009] Calculating the flight time of the projectile using a firing table approximation algorithm and the system delay time of the projectile fuse arming system;

[0010] Calculating the fuse time of the projectile according to the flight time of the projectile and the in-bore time of the projectile.

[0011] In a possible implementation, determining the fuze setting mode of the projectile according to the motion characteristics of the striking target relative to the projectile includes:

[0012] When the motion speed of the striking target relative to the projectile is less than the first predetermined speed threshold, the fuze setting mode of the projectile is to simultaneously set the fuze times of n projectiles, the fuze times of the n projectiles are the same, and n is a positive integer;

[0013] When the motion speed of the striking target relative to the projectile is uniform, the fuze setting mode of the projectile is to simultaneously set the fuze times of n projectiles, and the fuze times of the n projectiles are different;

[0014] When the motion speed of the striking target relative to the projectile is greater than the second predetermined speed threshold, the fuze setting mode of the projectile is to sequentially set the fuze times of the projectiles.

[0015] In a possible implementation, the projectile striking target parameters include: the time T_fire required for the projectile to ignite, the time T_bindyx required for the projectile to set the fuze, and the time T_intn of the projectile in the barrel.

[0016] In a possible implementation, calculating the delay time of the projectile fuze setting system according to the fuze setting mode includes:

[0017] When the fuze setting mode of the projectile is to simultaneously set the fuze times of n projectiles and the fuze times of the n projectiles are the same, calculate the system delay time of the middle projectile of the projectile fuze setting system, and the system delay time T_sysdelay is:

[0018] T_sysdelay = (T_bindyx + T_fire) × (n - 1) / 2 + T_intn.

[0019] In a possible implementation, calculating the delay time of the projectile fuze setting system according to the fuze setting mode includes:

[0020] When the fuze setting mode of the projectile is to simultaneously set the fuze times of n projectiles and the fuze times of the n projectiles are different, calculate the system delay time of each projectile of the projectile fuze setting system, and the system delay time T_sysdelay is:

[0021] T_sysdelay = (T_bindyx + T_fire) * n + T_intn.

[0022] In a possible implementation, calculating the delay time of the projectile fuze setting system according to the fuze setting mode includes:

[0023] When the fuze setting method of the projectile is to sequentially set the fuze time of the projectile, calculate the system delay time of each projectile in sequence, and the system delay time T_sysdelay is:

[0024] T_sysdelay = T_bindyx + T_intn + T_fire.

[0025] In a possible implementation, the fuze time T_yinbao of the projectile is: T_yinbao = tf + T_intn, where tf is the flight time of the projectile.

[0026] A method for calculating the fuze setting time of a projectile based on target characteristics according to the present invention determines the fuze setting method of the projectile according to the motion characteristics of the strike target relative to the projectile; calculates the delay time of the projectile fuze setting system according to the fuze setting method and the projectile strike target parameters; calculates the flight time of the projectile by using the firing table approximation algorithm and the system delay time of the projectile fuze setting system; and calculates the fuze time of the projectile according to the flight time of the projectile and the in-bore time of the projectile. It can accurately calculate the fuze setting time of projectiles facing different types of strike targets and improve the accuracy of air bursts of projectiles. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings are used to provide a further understanding of the technical solutions of the present application or the prior art and constitute a part of the specification. Among them, the drawings expressing the embodiments of the present application are used together with the embodiments of the present application to explain the technical solutions of the present application, but do not constitute a limitation to the technical solutions of the present application.

[0028] Figure 1 Shows a flowchart of a method for calculating the fuze setting time of a projectile based on target characteristics according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0029] The following will describe in detail the embodiments of the present invention in conjunction with the drawings and embodiments, so as to fully understand how the present invention uses technical means to solve technical problems and achieve the corresponding technical effects and implement them accordingly. Each feature in the embodiments of the present application and the embodiments can be combined with each other on the premise of not conflicting, and the formed technical solutions are all within the protection scope of the present invention.

[0030] In addition, the steps shown in the flowchart of the drawings can be executed in a computer such as a set of computer-executable instructions. And although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0031] Figure 1 The flowchart of the method for calculating the setting time of the projectile fuse based on the target characteristics according to an embodiment of the present disclosure is shown. The method can be applied to 36-tube rockets, artillery shells, etc. in shipborne non-lethal weapon systems. Figure 1 As shown, the method may include:

[0032] Step S1: Determine the fuze setting method of the projectile according to the motion characteristics of the target relative to the projectile.

[0033] The projectile may be a rocket or rocket launcher in a non-lethal weapon system, and is not limited here.

[0034] In one example, when the speed of the target relative to the projectile is less than the first predetermined speed threshold, the fuze setting method of the projectile is to set the fuze time of n projectiles at the same time, and the fuze time of the n projectiles is the same, and n is a positive integer. At this time, the target is relatively stationary or has a very low speed relative to our shipborne non-lethal projectile system, wherein the first predetermined speed threshold is 2 meters / second, or 1.5 meters / second, and is not limited here, and is set as needed, as long as the first predetermined speed threshold is less than or equal to 2 meters / second.

[0035] When the target moves at a constant speed relative to the projectile, the fuze setting method of the projectile is to set the fuze time of n projectiles at the same time, and the fuze time of n projectiles is different. At this time, the target moves at a steady speed and direction relative to our ship-borne non-lethal projectile system (the target has poor maneuverability).

[0036] When the speed of the target relative to the projectile is greater than the second predetermined speed threshold, the fuze setting method of the projectile is to set the fuze time of the projectile in sequence. At this time, the target has strong mobility relative to our shipborne non-lethal projectile system, and the second predetermined speed threshold is 5 meters per second, or 5.5 meters per second. There is no limitation here, and it can be set as needed, as long as the second predetermined speed threshold is greater than or equal to 5 meters per second, and in this case, the speed of the target relative to the projectile is variable.

[0037] Combined with the actual application of a 36-tube rocket launcher in a non-lethal weapon system, the three types of fuze setting methods with different target characteristics mentioned above can be used to obtain the most appropriate fuze time calculation method by combining the target characteristics and their fuze setting methods, so as to accurately calculate the fuze setting time of projectiles facing different types of targets.

[0038] Step S2: Calculate the delay time of the projectile fuze setting system according to the fuze setting method and the parameters of the projectile hitting the target. Among them, the parameters of the projectile hitting the target include: the time T_fire required for the projectile to ignite, the time T_bindyx required for the projectile fuze to be set, the time T_intn in the barrel of the projectile, etc. For example, the time T_fire required for the projectile to ignite is approximately 160 ms, the time T_bindyx required for the projectile fuze to be set is approximately 130 ms, and the time T_intn in the barrel of the projectile is about 80 ms. According to actual needs, the above parameters can also be preset to other values. This is just an example and is not limited here.

[0039] Step S3: Calculate the flight time of the projectile by using the firing table approximation algorithm and the system delay time of the projectile fuze setting system;

[0040] Step S4: Calculate the fuze time of the projectile according to the flight time of the projectile and the time in the barrel of the projectile.

[0041] The following takes the example of hitting n projectiles at one time to illustrate the above three fuze setting methods and the calculation of their fuze times, where n is a positive integer.

[0042] When the fuze setting method of the projectile is to set the fuze times of n projectiles simultaneously and the fuze times of the n projectiles are the same, only the system delay time of the middle projectile is calculated at this time, and the system delay time T_sysdelay is:

[0043] T_sysdelay = (T_bindyx + T_fire) × (n - 1) / 2 + T_intn.

[0044] Use the firing table approximation algorithm and the system delay T_sysdelay to find the flight time tf of the projectile. Among them, the firing table approximation algorithm is a commonly used calculation method in the fire control and projectile control systems and will not be elaborated in detail here. The fuze time of the projectile is calculated by the sum of the flight time tf of the projectile and the time T_intn in the barrel of the projectile, that is, T_yinbao = tf + T_intn.

[0045] Through the above calculation method, the fuze setting time can be accurately obtained when the target to be hit is in a state of relative rest or extremely low speed relative to our shipborne non-lethal projectile system. The calculation is simple, the continuous shooting and firing speed is fast, and the response is fast.

[0046] When the fuze setting method of the projectile is to set the fuze times of n projectiles simultaneously and the fuze times of the n projectiles are different, calculate the system delay time of each projectile of the projectile fuze setting system. The system delay time T_sysdelay is: T_sysdelay = (T_bindyx + T_fire) * n + T_intn.

[0047] Specifically: for the first projectile, its system delay time is:

[0048] T_sysdelay = T_bindyx + T_intn + T_fire;

[0049] Based on the system delay T_sysdelay, the flight time tf of the first projectile is obtained, and the fuze time of the first projectile is calculated using the projectile fuze time formula as: T_yinbao = tf + T_intn.

[0050] For the second projectile, its system delay time is:

[0051] T_sysdelay = (T_bindyx + T_fire) * 2 + T_intn;

[0052] Based on the system delay T_sysdelay, the flight time tf of the second projectile is obtained, and the fuze time of the second projectile is calculated using the projectile fuze time formula as: T_yinbao = tf + T_intn. ...............

[0053] For the nth projectile, its system delay time is:

[0054] T_sysdelay = (T_bindyx + T_fire) * n + T_intn;

[0055] Based on the system delay T_sysdelay, the flight time tf of the nth projectile is obtained, and the fuze time of the nth projectile is calculated using the projectile fuze time formula as: T_yinbao = tf + T_intn.

[0056] Through the above calculation method, the fuze setting time can be accurately obtained for the state where the target to be struck is relatively stable in speed and direction (with poor target mobility) relative to our shipborne non-lethal projectile system, with a fast continuous shooting and firing speed and a fast response.

[0057] When the fuze setting method of the projectile is to set the fuze time of the projectile in sequence, the system delay time of each projectile is calculated in sequence, that is, first set the fuze time of the first projectile and fire it; then set the fuze time of the second projectile and fire it;..... finally set the fuze time of the nth projectile and fire it.

[0058] Specifically: for the first projectile, its system delay time T_sysdelay is:

[0059] T_sysdelay = T_bindyx + T_intn + T_fire;

[0060] Based on the system delay \(T_{sysdelay}\), the flight time \(t_f\) of the first projectile is obtained, and the fuze time of the first projectile is calculated using the projectile fuze time formula as: \(T_{yinbao}=t_f + T_{intn}\).

[0061] For the second projectile, its system delay time is:

[0062] \(T_{sysdelay}=T_{bindyx}+T_{intn}+T_{fire}\);

[0063] Based on the system delay \(T_{sysdelay}\), the flight time \(t_f\) of the second projectile is obtained, and the fuze time of the second projectile is calculated using the projectile fuze time formula as: \(T_{yinbao}=t_f + T_{intn}\). ...............

[0064] For the \(n\)th projectile, its system delay time is:

[0065] \(T_{sysdelay}=T_{bindyx}+T_{intn}+T_{fire}\);

[0066] Based on the system delay \(T_{sysdelay}\), the flight time \(t_f\) of the \(n\)th projectile is obtained, and the fuze time of the \(n\)th projectile is calculated using the projectile fuze time formula as: \(T_{yinbao}=t_f + T_{intn}\).

[0067] Through the above calculation method, the set fuze time of each projectile can be accurately calculated for the state where the target to be struck has strong mobility relative to our shipborne non - lethal projectile system.

[0068] The calculation method of the projectile fuze setting time based on target characteristics of the present invention determines the fuze setting method of the projectile according to the motion characteristics of the strike target relative to the projectile; calculates the delay time of the projectile fuze setting system according to the fuze setting method and the projectile strike target parameters; calculates the flight time of the projectile using the firing table approximation algorithm and the system delay time of the projectile fuze setting system; and calculates the fuze time of the projectile according to the flight time of the projectile and the in - bore time of the projectile. It can accurately calculate the set fuze time of projectiles for different types of strike targets and improve the accuracy of projectile air - burst.

[0069] Although the disclosed embodiments of the present invention are as above, the content described is only an embodiment adopted for the convenience of understanding the present invention and is not used to limit the present invention. Any person skilled in the art within the technical field to which the present invention pertains, without departing from the spirit and scope disclosed by the present invention, can make any modifications and changes in the form of implementation and details, but the patent protection scope of the present invention shall still be subject to the scope defined by the appended claims.

Claims

1. A calculation method for the arming time of a projectile fuze based on target characteristics, characterized in that, the method includes: determining the fuze arming method of the projectile according to the motion characteristics of the striking target relative to the projectile; calculating the delay time of the projectile fuze arming system according to the fuze arming method and the projectile striking target parameters; calculating the flight time of the projectile by using the firing table approximation algorithm and the delay time of the projectile fuze arming system; calculating the fuze time of the projectile according to the flight time of the projectile and the in-bore time of the projectile; wherein, the determining the fuze arming method of the projectile according to the motion characteristics of the striking target relative to the projectile includes: when the motion speed of the striking target relative to the projectile is less than the first predetermined speed threshold, the fuze arming method of the projectile is to simultaneously arm the fuze times of n projectiles, the fuze times of the n projectiles are the same, and n is a positive integer; when the motion speed of the striking target relative to the projectile is uniform, the fuze arming method of the projectile is to simultaneously arm the fuze times of n projectiles, and the fuze times of the n projectiles are different; when the motion speed of the striking target relative to the projectile is greater than the second predetermined speed threshold, the fuze arming method of the projectile is to sequentially arm the fuze time of the projectile; the projectile striking target parameters include: the time T_fire required for the projectile to ignite, the time T_bindyx required for the projectile fuze to be armed, and the in-bore time T_intn of the projectile.

2. The calculation method according to claim 1, characterized in that, the calculating the delay time of the projectile fuze arming system according to the fuze arming method includes: when the fuze arming method of the projectile is to simultaneously arm the fuze times of n projectiles and the fuze times of the n projectiles are the same, calculating the system delay time of the middle projectile of the projectile fuze arming system, and the system delay time T_sysdelay is: T_sysdelay = (T_bindyx + T_fire) × (n - 1) / 2 + T_intn.

3. The calculation method according to claim 1, characterized in that, the calculating the delay time of the projectile fuze arming system according to the fuze arming method includes: when the fuze arming method of the projectile is to simultaneously arm the fuze times of n projectiles and the fuze times of the n projectiles are different, calculating the system delay time of each projectile of the projectile fuze arming system, and the system delay time T_sysdelay is: T_sysdelay = (T_bindyx + T_fire) * n + T_intn.

4. The calculation method according to claim 1, characterized in that, the calculating the delay time of the projectile fuze arming system according to the fuze arming method includes: when the fuze arming method of the projectile is to sequentially arm the fuze time of the projectile, sequentially calculating the system delay time of each projectile, and the system delay time T_sysdelay is: T_sysdelay = T_bindyx + T_intn + T_fire.

5. The calculation method according to claim 1, characterized in that, the fuze time T_yinbao of the projectile is: T_yinbao = tf + T_intn, where tf is the flight time of the projectile.

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