Self-adapting morphing trailing edge based on SMA

Abstract

The invention relates to a self-adapting morphing trailing edge based on SMA, belonging to a self-adapting morphing wing which combines intellectual materials and structures. The wing is divided into 2-5 trailing edge segments, the adjacent trailing edge segments are connected by joints (5, 6 and 7) arranged at wing ribs, a deflection driving mechanism is arranged between the adjacent trailing edge segments, and the deflection of the entire trailing edge is realized by accumulative effects of the trailing edge segments. The self-adapting morphing wing is characterized in that the deflection driving mechanism comprises an upper SMA wire (10), a lower SMA wire (11) and a current excitation unit (15) which are respectively connected with the adjacent trailing edge segments. The self-adapting morphing trailing edge has the advantages of simple structure and easy control and achieves the goal of quick, stable and accurate pre-deformation of the trailing edge.

Description

Technical field [0001] The trailing edge of the SMA-based adaptive variant wing of the present invention belongs to an adaptive variant wing structure that combines smart materials and structures. Background technique [0002] The concept of "transforming wing" can be traced back to the last century. As early as 1916, someone in the United Kingdom filed a patent application for "deformable wings-wings that can change geometry", and it has a history of more than 90 years. Aviation technology has been developed for more than 100 years, and aircraft design technology has continued to advance. Retractable landing gear, flaps, variable sweep wing, etc. In fact, it can be regarded as the initial stage of the development of "intelligent deformable aircraft". [0003] In 1979, NASA signed a contract with Boeing to develop a flexible composite material "adaptive wing", which can continuously change its shape and obtain maximum aerodynamic benefits. In 1987, it conducted a flight test. F...

AI Technical Summary

Problems solved by technology

However, since the structure is connected to each other through the rotating shaft and the sliding hinge, the structure is relatively complicated, and the deflection angle is limited to a certain extent.

At the same time, this structure does not have a corresponding drive unit, so automatic control cannot be realized, and the deflection accuracy is poor

Images