Speed prediction based segmentation iteration remaining time estimation method

Abstract

The invention discloses a speed prediction based segmentation iteration remaining time estimation method. The flight velocity of a missile is a known constant value, starting from a starting point of a first segmented section, the starting point is corresponding to the initial conditions of the relative motion of the missile and a target, and corresponding state variables at the tail ends of the segmentation sections are calculated by a segmentation iteration method according to the initial conditions of the relative motion of the missile and the target. According to the speed prediction based segmentation iteration remaining time estimation method, the problems that the accurate estimation on the remaining time is difficult to achieve due to the time-varying size of the flight velocity of the missile due to the fact that the size of the velocity of the practical missile is not controlled can be effectively solved; compared with the existing segmentation iteration remaining time estimation method, the estimation accuracy of the remaining time is greatly improved; the estimation accuracy is improved and the problem that the existing remaining time estimation method based on the proportional guidance law or the proportional guidance law with angle control is only applicable to the ideal situation that the flight velocity of the missile is the known constant value in case of a large advance angle is well solved.

Description

technical field [0001] The invention belongs to the technical field of calculating the remaining flight time of anti-ship missiles, in particular to a method for estimating the remaining time of the segmented iteration based on speed prediction. Background technique [0002] Whether it is to realize the simultaneous arrival guidance of anti-ship missiles or to implement the optimal guidance law, it is very important to accurately estimate the remaining flight time. The remaining flight time is referred to as the remaining time, that is, Time-to-go. To achieve simultaneous arrival and guidance of anti-ship missiles, it is first necessary to accurately estimate the remaining time of the missile, and on this basis, effective adjustment and control of the remaining time can be carried out. speed, if the proportional guidance law is used, and the guidance track is close to a straight line, then this remaining time estimation method is better, but when studying the angle control g...

AI Technical Summary

Problems solved by technology

[0011] The purpose of the embodiments of the present invention is to provide a segmented iteration remaining time estimation method based on speed prediction, which aims to solve the remaining time estimation based on the proportional guidance law / proportional guidance law with angle control in the current large lead angle situation The method is only suitable for the ideal situation where the missile flight speed is a known constant value. A method for estimating the remaining time of the anti-ship missile under the condition of a large lead angle is obtained in the actual situation, which can be used for anti-ship missiles. Implementation of Simultaneous Arrival Guidance or Optimal Guidance Laws for Ship-Based Missiles

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