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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers, Part C. Journal of mechanical engineering science >Research and application of novel planar bending embedded shape memory alloy actuator
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Research and application of novel planar bending embedded shape memory alloy actuator

机译：新型平面弯曲嵌入式形状记忆合金作动器的研究与应用

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摘要

To overcome low-response speed and low-control precision in the existing traditional shape memory alloy (SMA) actuators, a new type of structure named planar bending embedded SMA actuator was developed. Two SMA wires were embedded in parallel with the axis of the elastic rod. The recovering wire, which was superposed along rod's axis, was set to obtain 'U' memory shape and the restoring wire, which was placed off-axially, got straight memory shape. The differential stain gauges were located at suitable position in corresponding to the actuator's bending direction in order to measure the signal of displacement. By making use of continuity, common origin and common limit conditions, and adjusting martensite fraction coefficients appropriately, the analytical model was deduced to adequately account for the presence of major and minor hysteresis loops. The structural parameters of 60 mm long actuator, such as rod's radius, wire's radius, wire's recoverable curvature, and offset distance, were optimized by combining analytical model with experimental results. The experimental results prove the merits in optimal prototype.
机译：为了克服现有传统形状记忆合金（SMA）执行器的低响应速度和低控制精度，开发了一种新型的结构，称为平面弯曲嵌入式SMA执行器。将两条SMA线平行于弹性杆的轴线嵌入。沿杆的轴线叠置的恢复线设置为“ U”形记忆形状，离轴放置的恢复线为直线形记忆形状。差示污点仪位于与执行器的弯曲方向相对应的适当位置，以测量位移信号。通过利用连续性，共同原点和共同极限条件，并适当调整马氏体分数系数，推导了分析模型以充分考虑到主要和次要磁滞回线的存在。通过将分析模型与实验结果相结合，优化了60 mm长执行机构的结构参数，例如杆的半径，线材的半径，线材的可恢复曲率和偏移距离。实验结果证明了最优原型的优点。

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