Variable aircraft flexible wing, variable stiffness skin structure and preparation method thereof

Abstract

The invention discloses a variable aircraft flexible wing, a variable stiffness skin structure thereof and a preparation method thereof. The variable aircraft flexible wing, the variable stiffness skin structure thereof and the preparation method thereof comprise a variable stiffness skin unit, the variable stiffness skin unit comprises two layers of dielectric elastomer material single-layer films, two layers of fiber units and an air extraction pipe; the upper surface and the lower surface of each dielectric elastomer material single-layer film are coated with flexible electrodes; the fiberunits are packaged between two layers of dielectric elastomer material single-layer films; when the dielectric elastomer material single-layer film is electrified and deformed, the fiber units can slide relatively; the air extraction pipe is packaged between two layers of dielectric elastomer material single-layer films, an air inlet of the air extraction pipe is arranged between the fiber units,and an air outlet of the air extraction pipe is communicated with the variable stiffness skin unit. The variable aircraft flexible wing, the variable stiffness skin structure thereof and the preparation method thereof have the advantages of light weight, high efficiency and quick response.

Description

technical field [0001] The invention belongs to the technical field of variant aircraft wing structure design and the technical field of intelligent materials, and in particular relates to a variant aircraft flexible wing and its variable stiffness skin structure and preparation method. Background technique [0002] The dielectric elastomer material (Dielectric Elastomer, DE) is a kind of highly elastic high molecular polymer, which is composed of the polymer film of the core layer and the upper and lower flexible electrodes. The polymer film is affected by the electric field to produce area expansion and deformation, and the flexible electrode transmits the external voltage signal to the surface of the film, which acts as a conductive medium. Under the action of an external electric field, the dielectric elastomer can produce large deformation, and has the characteristics of high elastic energy density, short reaction time, high efficiency, flexibility and light weight. It...

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Problems solved by technology

In addition, the skin structure also bears and transmits aerodynamic loads, and it is necessary to ensure a smooth surface so that the wing has good airtightness; the deformation driver provides sufficient deformation power for the deformation of the deformed wing; the deformation mechanism directly affects the wing Skin configuration and aerodynamic shape, which in turn affects aircraft efficiency and performance

The skin structure and its drive unit in the flexible wing of the existing variant aircraft have the defects of long response time, low efficiency and heavy mass

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