An Optimal Design Method for Inflatable Wing

Abstract

The invention discloses an optimized design method of an inflatable wing, which specifically comprises the following steps of: determining each index parameter of the inflatable wing according to a target design wing, wherein the chord and span length of the wing and the like are included; adding a constraint airfoil with the same chord wise length and different thicknesses in a target design airfoil, so that the intersection points of adjacent inscribed circles are on the constraint airfoil, controlling the position, the number of the inscribed circles and the length of a stay by controllingthe thickness of the constraint airfoil. The design wing with inscribed circle approximation is rectified, and the local depression area of the inflatable wing is smoothed by the skin. the section constraint airfoil of the inflatable wing is the same as the chord length of the target design airfoil, and the thickness of the inflatable wing is 0.75-0.95 of the thickness of the target design airfoil; when an inscribed circle is adopted to approach a target design airfoil, the number of the inscribed circles is between 7-19, determined by the operability and convenience of machining and the sizeof the target design airfoil.

Description

technical field [0001] The invention relates to an optimal design method of an inflatable wing, belonging to the technical field of wing design. Background technique [0002] The inflatable structure shows its use value in the aerospace field due to its light weight, small storage volume and convenient portability. Conventional bracing type inflatable wing is exactly a kind of typical multi-cavity inflatable structure. The United States was the first to apply the inflatable wing technology to the aerospace field. After that, Switzerland, Japan and other countries conducted research on the inflatable wing. [0003] With the introduction of the concept of unmanned aerial vehicles, the heating up of its research, the development of inflatable technology, material technology, stiffening technology, processing technology and control technology, the inflatable wing unmanned aerial vehicle has aroused people's widespread popularity due to its unique characteristics. focus on. Ma...

AI Technical Summary

Problems solved by technology

[0005] At present, the research on inflatable wings at home and abroad mainly takes the stretched inflatable wing as the research object, focusing on the lightweight material of the inflatable wing, internal structure design, structural aerodynamic integration design, bending, vibration performance and inflatable wing. In the flight test of UAVs, there are few studies on the conformal design and shape optimization of inflated wings.

In addition, for the inflated structure of the inflated wing, it is easy to produce a large deformation under the action of the internal air pressure, and the current method of conformal design by controlling the number of inscribed circles to approach the standard airfoil has an impact on the lift-drag ratio of the inflated wing Larger, it needs to be optimized

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