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Firing data obtaining method of artillery fire control system

A technology of fire control system and shooting elements, which is applied in the direction of design optimization/simulation, complex mathematical operations, etc., can solve the problems of divergence, secant method, poor convergence speed and accuracy, and difficult implementation, and achieve high calculation efficiency.

Pending Publication Date: 2020-01-24
NANJING UNIV OF SCI & TECH
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Problems solved by technology

Among them, the simple iterative method and the improved iterative method have the problem of divergence; the initial value selection of the fast iterative method is difficult, and the result of improper selection may converge to a non-true solution; the Newton method has a derivative operation, which is not easy to implement on the computer. It is replaced by the secant method that simplifies the derivation by difference quotient, while the convergence speed and accuracy of the traditional secant method are poor

Method used

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  • Firing data obtaining method of artillery fire control system
  • Firing data obtaining method of artillery fire control system
  • Firing data obtaining method of artillery fire control system

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Embodiment 1

[0061] According to the requirements of the national military standard, it is assumed that the target is flying horizontally at a constant altitude, with a flight altitude of 1000 meters, a flight speed of 300m / s, and a flight speed of 1000 meters. Parallel, the sampling period is 20ms, the iterative calculation accuracy of the flight time is set to 1ms, and the ballistic equation adopts the fourth-order fitting function of the 25mm anti-aircraft gun firing table. The schematic diagram of the projection of the flight track on the horizontal plane is as follows: image 3 shown.

[0062] The shooting elements are calculated for the route, and the results are shown in Table 1.

[0063] Table 1

[0064]

[0065] It can be seen that, except that the number of iterations in the first two iterations is greater than 2, starting from the third iteration, it only needs to iterate once to converge to within 1ms, which has high computational efficiency.

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Abstract

The invention provides a firing data obtaining method of an artillery fire control system. On the basis of a traditional secant method, the firing data obtaining method increases the convergence rateof iterative solution by optimizing selection of iterative initial values, so as to achieve higher calculation efficiency and precision. The firing data obtaining method stores recent historical bounce-off time data in a fixed sliding window, estimates the bounce-off time at the current moment according to the stored bounce-off time data, and takes the estimated bounce-off time as an iterative initial point of a hit equation solution to solve the current actual bounce-off time, and then other hit data elements are obtained.

Description

technical field [0001] The invention relates to fire control technology, in particular to a method for obtaining shooting elements of an antiaircraft artillery fire control system. Background technique [0002] The establishment and solution of the hit equation is the core task of fire control calculation. The hit equation is composed of the target motion equation and the ballistic equation, which is a nonlinear high-order equation about the flight time of the projectile. A suitable hit equation solution method should take into account both the solution accuracy and the solution speed. [0003] The traditional methods for solving nonlinear hit equations include linearization method and search method. These methods all need to obtain the first-order or second-order partial derivatives of nonlinear functions, and the algorithms are complicated and the calculation time is long. Optimization methods include iterative methods (simple iterative method, improved iterative method, ...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F17/11G06F17/15
CPCG06F17/11G06F17/15
Inventor 陶正超李银伢
Owner NANJING UNIV OF SCI & TECH
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