Trajectory equation-based miss distance calculation method and system

A calculation method and technology for missing target amount, applied in the field of missing target amount calculation, can solve the problems of complex calculation, complex coordinate system conversion, unpredictable amount of missed target, etc., and achieve the effect of improving calculation accuracy

Active Publication Date: 2020-04-10
NANJING UNIV OF SCI & TECH
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Problems solved by technology

This method is a post-test method, which cannot predict the amount of off-target, an

Method used

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  • Trajectory equation-based miss distance calculation method and system
  • Trajectory equation-based miss distance calculation method and system
  • Trajectory equation-based miss distance calculation method and system

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Embodiment

[0093] Generally speaking, the amount of off-target calculated by the posterior definition method of traditional theory is used as a benchmark to measure whether the results of other methods are accurate.

[0094] The specific principle of using the post-test definition method to calculate the miss amount is as follows:

[0095] Let the target track be D t (t), the trajectory of the warhead is D d (t), the norm of the projectile deviation E is:

[0096] ||E||=min||Dd(t)-D t (t)||

[0097] If the projectile is defined as t=0, there will definitely be t=t f Instantaneously, there are:

[0098]

[0099] Where Is the relative velocity vector of the warhead to the target.

[0100] It can be seen from the above that all the projectile deviation vectors are perpendicular to the relative velocity of the projectile to the target.

[0101] Since t≥0, the relative velocity of the warhead to the target always exists, so there must be a single plane perpendicular to the above-mentioned relative veloc...

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Abstract

The invention discloses a trajectory equation-based miss distance calculation method and system and belongs to the technical field of miss distance calculation. The method comprises the steps of: building a trajectory equation according to the type of a projectile and the influence factors of the movement of the projectile; calculating an outer ballistic trajectory on the basis of the ballistic equation so as to obtain projectile position information; and reading the coordinates of the hitting point of the projectile, and solving a miss distance under a ground coordinate system on the basis ofthe projectile position information. The system comprises a ballistic equation construction module, a projectile position information acquisition module and a miss distance calculation module, and isused for realizing the method. According to the method and system of the invention, the flight time, azimuth angle and launching angle of the projectile are used as initial conditions; the motion trajectory is calculated on the basis of a trajectory equation; and the miss distance, azimuth angle and angular altitude between the projectile and the hitting point are calculated. With the method andsystem of the invention adopted, the miss distance can be predicted in advance; a calculation result shows that the miss distance calculated by the method is very close to a theoretical miss distancecalculation result; calculation precision is high; and a theoretical basis can be provided for the precision evaluation of the miss distance.

Description

Technical field [0001] The invention relates to the technical field of miss distance calculation, in particular to a method and system for calculating miss distance based on a ballistic equation. Background technique [0002] Missing distance is an important parameter for assessing tactical and technical indicators such as the accuracy of projectile hits. The calculation of high-precision misses is still a difficult problem to be solved in the accuracy assessment of aircraft attack targets. Missing distance refers to the minimum distance between the shell and the target, which indicates the error of the shell hitting the target, or called the hit accuracy. [0003] The theoretical calculation method of miss distance is based on the establishment of the relative velocity coordinate system, constructing the target's ballistic surface, and establish the plane equation of the target's ballistic surface and the solution of the plane equation based on the distance vector between the targ...

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Application Information

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IPC IPC(8): G06F17/12
CPCG06F17/12
Inventor 徐玲王军张贤椿
Owner NANJING UNIV OF SCI & TECH
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