A design method for vertical take-off and landing fixed-wing aircraft

Abstract

The invention belongs to the field of design of aviation aircrafts, and relates to a method for designing a fixed-wing aircraft capable of vertically taking off and landing. The method for designing the aircraft is used for a mixed-mode aircraft and can be realized under current technical conditions, and vertical taking-off and landing are achieved on the basis of the fixed-wing aircraft. When the contradiction between vertical flight and wing-borne flight is handled with, design is conducted with the wing-borne flight as the main working point, higher cruise efficiency and higher cruise capacity are pursued to the larger extent under the current technical conditions, and the requirement for efficient long-time cruise is better met. When the contradiction between the vertical flight and the wing-borne flight is handled with, through coordinated optimization design of two working points, part of performance of the vertical flight is considered, the efficiency and other performance of the vertical flight is improved on the premise of satisfying the cruise performance index, and design failure caused by unreasonable performance of the vertical flight is avoided.

Description

technical field [0001] The invention belongs to the field of aviation vehicle design, and relates to a design method of a fixed-wing aircraft capable of vertical take-off and landing. Background technique [0002] The mixed-mode aircraft can fly vertically like a rotorcraft (including a helicopter) to achieve vertical take-off and landing and hover; it can also fly like a fixed-wing aircraft to achieve efficient high-speed cruise. However, there is currently no systematic mixed-mode aircraft design method; and the vast majority of mixed-mode aircraft are developed on the basis of traditional fixed-wing aircraft or rotor aircraft, in the two working modes of vertical flight and wing-borne flight When designing separately, the traditional fixed-wing aircraft and rotary-wing aircraft design methods are directly adopted, and the conflict between these two design methods will often lead to design failure or performance failure to meet the index requirements. The thrust-to-weight...

AI Technical Summary

Problems solved by technology

Generally speaking, for mixed-mode aircraft, there is currently no systematic design method; there is a contradiction between the design method of fixed-wing aircraft corresponding to wing-borne flight mode and the design method of rotorcraft corresponding to vertical flight mode. Difficult to reconcile under technical conditions

[0003] For the transition process connecting the two flight modes, the attitude and velocity vectors of the aircraft undergo continuous and large changes, and the aerodynamic characteristics also change greatly, resulting in extremely nonlinear dynamic characteristics. It is very difficult to identify

Under the current technical conditions, it is almost impossible to achieve a stable and controllable transition process.

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