Guidance law of multi-constraint aircraft based on Bezier curve

Abstract

The invention provides a guidance law of a multi-constraint aircraft based on a Bezier curve, and belongs to the technical field of aircraft dynamics and guidance. According to a specified aircraft motion model and a three-order Bezier curve equation simulative ballistic trajectory, an attack angle and a heeling angle of the aircraft are determined by four controlling points with two middle controlling points described by parameters k1 and k2; a range of the parameters k1 and k2 meeting requirements of miss distance, collision angle and terminal attack angle is acquired through optimization; values of k1 and k2 corresponding to terminal speed maximum and terminal speed minimum are figured out; and according to a given terminal speed, the parameters of k1 and k2 are determined. Based on inverse dynamics, the terminal collision angle, the attack angle and speed constraint are all considered, requirements on the collision angle, the terminal attack angle and terminal collision speed can be met, and accurate attacks on fixed targets are achieved.

Description

technical field [0001] The invention belongs to the technical field of aircraft dynamics and guidance, and relates to an aircraft terminal guidance method, in particular to a guidance method used when an aircraft autonomously attacks a ground fixed target. Background technique [0002] Missile guidance law, that is, guidance law, is one of the key technologies of the fire control system to realize fighter tracking / interception guidance in air combat. The choice of guidance law is very important for the launch of the missile to accurately strike the target. The main factor considered by the classic guidance law is the amount of off-target. With the development of technology, regardless of anti-ship missiles or surface-to-surface missiles, while ensuring the amount of misses, rendezvous with the target according to the expected collision angle, and maintaining the desired attitude and speed during rendezvous is the goal of designing the guidance law. Guidance laws mainly inc...

AI Technical Summary

Problems solved by technology

[0005] However, none of the above-mentioned prior art has recorded a guidance method that can simultaneously guarantee the collision angle, the terminal attack angle and adjust the terminal collision velocity.

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