Lima Felipe S, Souto Cícero R, Oliveira Andersson G, Silvestre Alysson D, Alves Railson M N, Santos Sebastião E S, Gomez Ricardo S, Brito Glauco R F, Bezerra André L D, Santana Diogenes S M, Lima Antonio G B
Department of Mechanical Engineering, Federal University of Paraíba, João Pessoa 58051-900, Brazil.
Department of Electrical Engineering, Federal University of Paraíba, João Pessoa 58051-900, Brazil.
Sensors (Basel). 2024 Jul 31;24(15):4973. doi: 10.3390/s24154973.
SMA actuators are a group of lightweight actuators that offer advantages over conventional technology and allow for simple and compact solutions to the increasing demand for electrical actuation. In particular, an increasing number of SMA torsional actuator applications have been published recently due to their ability to supply rotational motion under load, resulting in advantages such as module simplification and the reduction of overall product weight. This paper presents the conceptual design, operating principle, experimental characterization and working performance of torsional actuators applicable in active rudder in aeronautics. The proposed application comprises a pair of SMA torsion springs, which bi-directionally actuate the actuator by Joule heating and natural cooling. The experimental results confirm the functionality of the torsion springs actuated device and show the rotation angle of the developed active rudder was about 30° at a heating current of 5 A. After the design and experiment, one of their chief drawbacks is their relatively slow operating speed in rudder positioning, but this can be improved by control strategy and small modifications to the actuator mechanism described in this work.
形状记忆合金（SMA）致动器是一类轻质致动器，与传统技术相比具有优势，能够为日益增长的电动驱动需求提供简单紧凑的解决方案。特别是，由于其能够在负载下提供旋转运动，近年来越来越多的SMA扭转致动器应用得以发表，从而带来了诸如简化模块和减轻产品整体重量等优势。本文介绍了适用于航空领域主动舵的扭转致动器的概念设计、工作原理、实验特性和工作性能。所提出的应用包括一对SMA扭簧，它们通过焦耳热和自然冷却双向驱动致动器。实验结果证实了扭簧驱动装置的功能，并表明在5A加热电流下，所开发的主动舵的旋转角度约为30°。经过设计和实验，其主要缺点之一是在舵定位时运行速度相对较慢，但通过控制策略和对本文所述致动器机构的小改动可以加以改进。
