Self-adapting morphing trailing edge based on SMA

A variant wing, self-adaptive technology, applied in the direction of heat reduction structure, etc., can solve the problems of inability to realize automatic control, no drive unit, deflection angle limitation, etc., to achieve the effect of reducing weight, increasing driving force, and improving deformation efficiency

Inactive Publication Date: 2010-04-14
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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...

Method used

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  • Self-adapting morphing trailing edge based on SMA
  • Self-adapting morphing trailing edge based on SMA
  • Self-adapting morphing trailing edge based on SMA

Examples

Experimental program
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Embodiment Construction

[0018] The SMA-based adaptive variant wing trailing edge structure of the aircraft of the present invention is based on a certain unmanned aerial vehicle wing trailing edge airfoil, and a structural model designed based on experimental data of the airfoil, including epoxy The wing trailing edge structure composed of resin plate wing ribs, aluminum alloy long trusses, rigid beams and a drive system composed of shape memory alloy (SMA). The structure-driven scheme of the present invention is as figure 1 As shown, the deflection of the trailing edge structure of the wing is achieved through the cumulative effect of multiple articulated chains. Among them, unit one and unit two form joint one; unit two and unit three form joint two; unit three and unit four form joint three. The drive system is composed of parallel SMA wires, which are fixed on the stringer between the two wing ribs (embedded with epoxy resin for insulation treatment). Considering the flight conditions that simulat...

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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...

Claims

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Application Information

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IPC IPC(8): B64C3/36
Inventor 徐志伟李飞杨媛
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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