Morphing wing trailing edge driven based on shape memory alloy and deflection method thereof

Abstract

The invention provides a morphing wing trailing edge driven based on shape memory alloy and a deflection method thereof. The trailing edge is partially wound on an insulating rod by utilizing an SMA wire; through heating the SMA wire, the rotation of the insulating rod is realized by utilizing the shape memory effect of the SMA wire; the insulating rod is connected with a worm, so that a traditional motor is replaced for driving; a trailing edge flap is divided into two parts: an upper part and a lower part; according to the deflection method provided by the invention, through the rotation of one worm, two worm wheels are simultaneously driven to rotate, so that upper and lower wing ribs simultaneously deflect from equilibrium positions to limiting positions, and through changing the transmission ratios of the worm wheels and the worm, the deflection of the upper and the lower wing ribs at different angles can be realized.

Description

technical field [0001] The invention relates to the field of flight control, in particular to a design of a variant trailing edge mechanism driven by a shape memory alloy and a deflection method thereof in the case of a thinner airfoil. Background technique [0002] The traditional trailing edge flap driving method is mainly electromechanical driving, such as hydraulic driving, which has the advantages of high sensitivity and safety, and is suitable for large load requirements, but has disadvantages such as high cost and easy oil leakage; motor driving has the advantage of having Larger power-to-mass ratio and high control precision, but the drive circuit is relatively complex and requires high stability of the equipment. With the research and development of new materials and technologies, new smart materials are constantly emerging. Among them, piezoelectric ceramic materials, magnetostrictive materials and shape memory alloys (SMA) are suitable for driving components. [...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a modified wing trailing edge and its deflection method based on shape memory alloy drive, which uses a new intelligent material shape memory alloy drive to replace the traditional motor drive, and solves the problem of thin airfoils. There is not enough space to install the motor, etc.

Images