Attack angle constrained high-speed interception guidance method

Abstract

The invention discloses an attack angle constrained high-speed interception guidance method. The attack angle constrained high-speed interception guidance method comprises the following steps of establishing the relative motion relation between a guided missile and a target with the longitudinal plane where the guided missile and the target are located as an attack plane to obtain an expression ofrelative motion parameters; deducing expressions of the zero effort miss and zero effort speed according to the missile-target relative motion parameters; making the zero effort miss and zero effortspeed as first-layer sliding mode variables according to the hierarchical sliding mode theory and combining a first-layer sliding mode into a second-layer mode; and selecting an exponential reaching law, making the exponential reaching law equal to the second-layer mode about the time derivative and then solving the falling angle constraint missile guidance law of a high-speed flight missile. Through the attack angle constrained high-speed interception guidance method, the missile hits on the target at the preset angle of sight to improve the destroy effect. When the missile intercepts the target at high speed, the missile hits on the target with small zero effort miss. Thus, the attack angle constrained high-speed interception guidance method has good reliability.

Description

technical field [0001] The invention belongs to the technical field of guidance, and in particular relates to a high-speed interception guidance method with attack angle constraints. Background technique [0002] In recent years, with the rapid development of guidance technology, the maneuverability of cruise missiles and hypervehicles has also made great progress. The use of these high-speed and large maneuvering aircraft has brought severe challenges to the defense systems of various countries. For this kind of interception problem, due to the relatively high velocity of the projectile and the target, this undoubtedly puts forward higher requirements for the accuracy and speed of the new guidance method. In order to improve the damage efficiency of the missile to the target, it is not only required that the missile can hit the target accurately, but also must be able to hit the target at a specific angle. [0003] Among the common guidance laws, the proportional guidance...

AI Technical Summary

Problems solved by technology

[0003] Among the common guidance laws, the proportional guidance method is a common and universally applicable guidance strategy. It can hit the target with good accuracy when the relative velocity of the projectile and the target velocity and the angular velocity of the line of sight are known, but it cannot limit the Angle of sight

The optimal guidance law with terminal angle constraints can hit the target according to the preset line-of-sight angle, but in the case of a large maneuvering target, there will be a large amount of misses, which will undoubtedly reduce the reliability of interception

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