Shape memory alloy based extension wing unfolding device

Abstract

The invention discloses a shape memory alloy based extension wing unfolding device, and relates to the field of flight adaptability of an aircraft in the complex airflow environment. An inner wing root is arranged on the edge of a fixed inner wing, the fixed inner wing is fixedly installed on the outer surface of the outer aircraft through the inner wing root; an inner wing beam is fixedly installed on the inner side of the inner wing root; the inner wing beam is fixedly connected with an outer wing beam; the outer wing beam is sleeved on the outer wall of the inner wing beam; a pulley is fixedly installed at one end of the outer wing beam; an extension outer wing is fixedly connected with the pulley; the two ends of a shape memory alloy wire are respectively fixedly connected with the two ends of the inner wing root, and are sleeved on the edge of the pulley. The shape memory alloy is used as a drive source, the elongation of the shape memory alloy wire is adjusted by changing the supply current of the shape memory alloy, the extension movement of an extension wing is realized through the match of the common spring and the shape memory alloy wire, and the problems that the current extension wing drive mechanism is huge and cannot be unfolded and shrunk for a plurality of times are solved.

Description

technical field [0001] The invention relates to the field of flight adaptability of aircraft in complex aerodynamic environment, in particular to a telescopic wing expansion device based on shape memory alloy. Background technique [0002] More and more aircraft are striving to achieve multi-speed and multi-airspace flight missions. Therefore, the aircraft is faced with a complex aerodynamic environment, and it is necessary to solve different flight adaptability problems such as high-altitude high-speed and low-altitude low-speed. [0003] Therefore, in order to achieve the multi-airspace and multi-speed flight goals of the aircraft, the use of retractable wing variant technology has a good application prospect. At the same time, the traditional telescoping mechanism driven by a worm gear and a motor has a complex mechanical structure, a large volume and a large weight, and cannot be applied to thinner wings. [0004] At present, there is no similar product design for dome...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and provide a telescopic wing expansion device based on shape memory alloys, which adopts shape memory alloys as the driving source, and adjusts the stretching of shape memory alloy wires by changing the size of the shape memory alloy power supply current. Length, by cooperating with ordinary springs, the telescopic movement of the telescopic wing is realized, which solves the problem that the drive mechanism of the telescopic wing is huge and cannot be expanded and contracted multiple times

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