Canard-based flight control method, flight control system and aircraft

Abstract

The invention relates to the technical field of airplanes, in particular to a flight control method and system based on duck wings and an airplane. The method is applied to the airplane, and the duckwings are telescopically arranged on a front section of an airplane body of the airplane. The method includes the steps that the current flight state of the airplane is recognized; a corresponding control command is generated on the basis of the flight state; and the duck wings are controlled to conduct telescopic motion on the basis of the control command. By the adoption of the technical scheme,the small-sweepback duck wings can be arranged in a low-speed flight state and converted into large-sweepback strake wings in a high-speed flight state, and therefore the low-speed aerodynamic characteristic and the operation stabilization characteristic of a BWB layout are improved under the condition that the cruising aerodynamic characteristic is guaranteed.

Description

technical field [0001] The present application relates to the technical field of aircraft, in particular to a canard-based flight control method, flight control system and aircraft. Background technique [0002] Economy is an important factor in the design of passenger aircraft. Aircraft designers pursue how to use less energy consumption to obtain greater lift and drag, longer range and more on the basis of safety, comfort and environmental protection. passenger. Therefore, in the future, large passenger aircraft will put forward higher requirements for aerodynamic layout. If the conventional layout increases the lift-drag ratio and increases the range, the wing area must be increased, and the loading space can only be increased by increasing the length and cross-section of the fuselage. to satisfy. However, the excessively large wings and fuselage bring many challenges to the structure and aerodynamics, and cause problems such as low weight efficiency and difficult seria...

AI Technical Summary

Problems solved by technology

[0007] The traditional BWB layout generally has the defects of low speed and poor handling performance. To solve these problems, a new BWB layout with variable sweep canard is proposed, that is, the canard with small sweep is arranged at low speed flight state, and the In the high-speed flight state, it is converted into a large-swept wing, so as to improve the low-speed aerodynamic characteristics and control stability characteristics of the BWB layout while ensuring the cruising aerodynamic characteristics.

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