A method of suppressing ship wake disturbance based on direct lift control for carrier aircraft

Abstract

The invention discloses a method for suppressing wake disturbance of a carrier aircraft based on direct lift control. The method is specifically as follows: step 1, establishing a nonlinear model of longitudinal motion of the carrier aircraft; step 2, aiming at the nonlinear model in step 1 Form, design a second-order h-γ cascade active disturbance rejection controller, use the extended state observer to observe the state variable of height and the state variable of glide angle respectively, and form the state error feedback and disturbance compensation, and get G L (δ); Step 3. For the nonlinear model form in step 1, design a second-order θ-q cascade active disturbance rejection controller, and use the extended state observer to observe the attitude angle state variable and the angular velocity state variable respectively, and form a state error feedback and disturbance compensation, to obtain C m (δ); according to C L (δ) and C m (δ), the actual rudder deflection is obtained by using the weighted pseudo-inverse method for control assignment. The invention accelerates the response speed of the control system of the carrier-based aircraft, and effectively improves the control precision and anti-interference ability of the carrier-based aircraft.

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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