Low-altitude flight pneumatic identification control method for dynamically correcting reference trajectory

Abstract

The invention relates to a low-altitude flight pneumatic identification control method for dynamically correcting a reference trajectory, and belongs to the field of aircraft control. According to the method, the method comprises the steps: firstly, an autoregression model is designed to predict the sea wave height, and a flight height reference instruction introducing sea wave height dynamic prediction information is given; then the aircraft longitudinal dynamics model is converted into a speed subsystem and a height subsystem, and dynamic inverse control is designed for the speed subsystem; and backstepping method control is designed for a height subsystem, the problem of unknown aerodynamic characteristics caused by sea waves is considered, an aerodynamic function is converted into a linear parameterization form of multiplication of a known state vector and an unknown aerodynamic parameter vector, and an adaptive estimation law is designed to estimate unknown aerodynamic parameters. According to the pneumatic identification control method for designing the dynamic correction of the reference trajectory by considering the influence of sea waves, highly fine control is realized, and the method is of great significance to ultra-low-altitude sea-skimming penetration prevention.

Description

technical field [0001] The invention relates to an aircraft control method, in particular to an aerodynamic identification control method for low-altitude flight with dynamic correction of reference trajectory, and belongs to the field of aircraft control. Background technique [0002] The ultra-low-altitude sea-skimming flight of the aircraft can cover its own scattering characteristics with the help of the sea surface background, effectively avoid ships and airborne radars, and realize surprise attacks on enemy ships and ships at sea, greatly enhancing its survival and penetration capabilities. Ocean waves are the main environmental factor affecting ultra-low-altitude sea-skimming flight. On the one hand, it directly interferes with the flight altitude through frequent wave fluctuations, and on the other hand, it affects the altitude control accuracy by affecting aerodynamic characteristics, thereby reducing survivability and low-altitude penetration effectiveness. Therefo...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the influence of sea waves on altitude interference and the uncertainty of aerodynamic parameters during ultra-low-altitude sea-skimming flight of aircraft, the present invention designs a low-altitude flight aerodynamic identification control method with dynamic correction of reference trajectory

Images