A bionic aircraft deformable nose cone device driven by shape memory alloy

Abstract

The invention provides a bionic aircraft transformable nose cone device based on shape memory alloy driving. The bionic aircraft transformable nose cone device comprises a section of annular shell, three sections of back plate shells imitating honeybee abdomen shells, three sections of abdominal plate shells imitating honeybee abdomen shells, a section of conical top shell, a plurality of connecting mechanisms, a plurality of telescopic mechanisms and a plurality of bending mechanisms, wherein each section of back plate shell and the corresponding abdominal plate shell can form an approximate section of annular shell; the connecting mechanisms are used for connecting the back plate shells and the corresponding abdominal plate shells; the telescopic mechanisms are driven by shape memory alloy and located between the corresponding shells, and diamond mechanisms are adopted for driving the adjacent shells to change the axial distances between the shells; and the bending mechanisms are driven by shape memory alloy and located between the corresponding shells, and six-rod mechanisms comprising diamond-shaped parts are adopted for driving the adjacent shells to change the relative angles between the shells. According to the bionic aircraft transformable nose cone device based on shape memory alloy driving, an aircraft nose cone can stretch and retract and can be bent downwards to transform, and the bionic aircraft transformable nose cone device has the advantages of being exquisite in design, and high in mechanism reliability.

Description

technical field [0001] The invention relates to the field of aerospace technology, and provides a bionic aircraft deformation nose cone device driven by a shape memory alloy. Background technique [0002] The aircraft nose cone is the part of the front end of the aircraft, which can reduce the frictional resistance and pressure difference resistance generated when flying through the atmosphere. When the flying speed of the aircraft is low, a blunt and streamlined nose cone is suitable for use; but when the speed of the aircraft exceeds the speed of sound, a sharp nose cone is required to break through the sound barrier. Aerospace vehicles have to experience special environments such as flying in the atmosphere and space, and re-entering the atmosphere, and have different requirements for the aerodynamic layout of their structures at each stage. Variant aerospace vehicles can autonomously realize variable aerodynamic configurations, increase the window period for launch and ...

AI Technical Summary

Problems solved by technology

[0003] At present, the design of variant aircraft in related technologies is mainly concentrated in the field of wings, and there are few researches on deformation technology in the field of nose cones.

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