Guidance method for air-to-ground missile launch glide phase including velocity process constraints and multi-terminal constraints

Abstract

The invention discloses an air-to-ground guided missile projection glide-section guidance method including speed process constraint and multi-terminal constraint. The method comprises the steps of dividing the resistance consumed energy into a part for overcoming the gravity and a turning maneuver part according to the characteristic that the lift-drag ratio of an aircraft is not great when a projection section nearly stays at an equilibrium gliding state, and respectively acquiring an expression; solving by utilizing the energy conservation law, and obtaining a corresponding relation of a terminal speed and longitudinal distance, so that the terminal speed constraint problem can be solved by utilizing the general guidance law; finally designing a speed control feedback by utilizing a normal control boundary and an axial control boundary, so that a guidance law which can simultaneously meet the requirements of terminal height, terminal angle, terminal speed and maximal speed constraint can be obtained. The air-to-ground guided missile projection glide-section guidance method has the advantages that the multi-constraint guidance problem of the projection glide section can be solved by adopting a closed-loop analysis guidance method, so that not only can good task adaptability be realized, but also convenience in engineering realization can be realized.

Description

technical field [0001] The invention belongs to the field of aerospace technology and weapons, and relates to a multi-constraint guidance method for launching a subsonic air-to-ground missile in the glide section. Specifically, it is a guidance method for the glide section of an air-to-ground missile that includes speed process constraints and multi-terminal constraints. Ensure that the missile is guided from the launch altitude to the ignition altitude under the minimum control index requirements, and meet the maximum airspeed constraint and terminal airspeed, angle of attack, and ballistic inclination constraints. Background technique [0002] Air-to-ground missiles are an important weapon for precision strikes in modern warfare, featuring low cost, strong defense penetration capabilities, and strong versatility. In modern warfare, air-to-ground missiles are required to have good task adaptability in order to ensure the safety of the carrier aircraft. In order to ensure t...

AI Technical Summary

Problems solved by technology

However, this guidance method has two shortcomings: first, it needs to calculate the reference trajectory in various situations off-line, the preparation work is complicated, and it cannot cope with the complex and changeable battlefield environment; poor robustness

However, most of the current closed-loop analytical guidance laws are obtained by linearizing the equations of motion assuming that the velocity is constant, and little consideration is given to the velocity control

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