Method for suppressing ship wake flow disturbance by shipboard aircraft based on direct lift control

Abstract

The invention discloses a method for suppressing ship wake flow disturbance by a shipboard aircraft based on direct lift control. The method specifically comprises the steps of 1 establishing a longitudinal motion nonlinear model of the shipboard aircraft; 2 designing a second-order h-gamma cascade active disturbance rejection controller for the nonlinear model form in the step 1, respectively observing a height state variable and a glide angle state variable by adopting an extended state observer, and forming state error feedback and disturbance compensation to obtain GL (delta); 3 designinga second-order theta-q cascade active disturbance rejection controller for the nonlinear model form in the step 1, respectively observing an attitude angle state variable and an angular velocity statevariable by adopting an extended state observer, and forming state error feedback and disturbance compensation to obtain Cm (delta); and according to the CL (delta) and the Cm (delta), performing control allocation by using a weighted pseudo-inverse method to obtain an actual rudder offset. According to the invention, the response speed of the shipboard aircraft control system is accelerated, andthe control precision and the anti-interference capability of the shipboard aircraft are effectively improved.

Description

technical field [0001] The invention belongs to the field of flight control. Background technique [0002] Carrier-based aircraft is an important attack force of aircraft carriers and plays an irreplaceable role in modern naval warfare. However, the carrier-based aircraft will be affected by the strong ship wake to generate aerodynamic force and moment during the landing process, which will cause the trajectory and attitude of the carrier-based aircraft to be strongly fluctuated, and bring undesirable dynamic loads to the carrier-based aircraft. In severe cases, the carrier-based aircraft cannot safely land on the ship, so how to suppress the ship's wake disturbance must be considered. The traditional PID controller has a contradiction between "rapidity" and overshoot, and it is difficult to achieve a good control effect at the end of the landing. Therefore, it is of great significance to study and design a control method that can suppress the ship's wake disturbance. [...

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: In order to solve the problems of low control effect and poor anti-wind disturbance ability due to large coupling in the prior art, the present invention provides a method for suppressing ship wake disturbance based on direct lift control for carrier-based aircraft

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