Aircraft path tracking method based on variable forward distance LOS guidance law

Abstract

The invention relates to an aircraft path tracking method based on a variable forward distance LOS guidance law, and belongs to the field of aircraft guidance control. An S-shaped function is adopted to represent the relation between the forward distance and the path tracking deviation in the LOS guidance law design, so that the aircraft can rapidly and stably converge to an expected path under the condition of different path tracking deviations, and it can be guaranteed that instructions are smooth and continuous during switching. Aiming at the characteristic of tilt turning maneuvering of an aircraft, the invention provides an instruction conversion method based on a Lyapunov stability theory, and a course angle instruction given by an LOS guidance law is converted into a roll angle instruction. The method is suitable for achieving maneuvering aircraft path tracking through inclined turning, and the task requirement that the aircraft converges to the expected path rapidly and stably can be met; meanwhile, the designed algorithm is easy to program and realize on a flight control computer, and has better engineering practicability.

Description

technical field [0001] The invention relates to an aircraft path tracking method based on a variable forward distance LOS guidance law, which belongs to the field of aircraft guidance and control. Background technique [0002] With the wide application of aircraft in military and civilian fields, further requirements are put forward for the autonomous flight capability of aircraft. Aircraft flight path planning and path tracking are the key technologies to realize its autonomous flight. The flight path planning system can obtain the desired flight path according to the flight mission requirements of the aircraft, threat information, and the motion characteristics of the aircraft. The aircraft path tracking system controls the aircraft to track the expected path. In order to improve the reliability of the aircraft during the flight mission, it is required that the aircraft can quickly and accurately track the desired flight path, so higher requirements are put forward for th...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of fast and accurate tracking of the desired path by the aircraft, and propose a method for tracking the path of the aircraft based on the variable forward distance LOS guidance law; the method can realize that the aircraft quickly and smoothly converges to the desired path

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