Terminal guidance method based on track on-line planning

Abstract

The invention relates to a terminal guidance method based on track on-line planning, and belongs to the technical field of guidance. The method comprises the steps as follows: firstly establishing a kinematic and kinetic model of an aerocraft, then carrying out initial-time lateral track design by adopting two tangential circular arcs as lateral reference track, and transforming random-time lateral track problem to initial-time lateral track problem by rotational and translational coordinate transform; designing longitudinal reference track as an elliptic curve according to the ground range-to-go and dive section trajectory characteristics obtained by lateral reference track; and calculating angle of heel mu and angle of attack alpha of terminal guidance according to the obtained current real-time dive section longitudinal and lateral tracks, inputting the angle of heel and angle of attack to an aerocraft model, and carrying out real-time planning and adjusting on the aerocraft track to meet the expected terminal condition, thereby realizing terminal guidance. The method is small in calculation amount, high in optimization efficiency, and short in calculation time; and the on-line planned dive section track meets the terminal constraint and can control the terminal velocity.

Description

technical field [0001] The invention relates to a terminal guidance method based on trajectory online planning, which belongs to the field of guidance technology. Background technique [0002] The dive phase of the re-entry vehicle is the final phase of the entire re-entry process, and precision strike missions are usually performed in this phase. The main purpose of the guidance system is to generate the appropriate commands so that the point of impact has zero misses. With the rapid development of guidance technology, the requirements for guidance system are getting higher and higher. [0003] In modern warfare, many tasks not only require missiles to accurately hit the target, but also expect a specific attitude when hitting the target. For example: anti-missile missiles are required to intercept incoming missiles head-to-head; anti-tank missiles are expected to hit the weak front armor vertically; anti-ship missiles are expected to attack ships from the side. Scholars...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the terminal speed cannot be controlled in the terminal guidance process with multiple constraints, the present invention proposes a terminal guidance method based on trajectory online planning

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