一种形状记忆合金扭转驱动器的制备与测试

Design and Test of a Kind of SMA Torsional Actuator

研究了一种以镍钛（NiTi）形状记忆合金带材为基本驱动材料的平面涡卷式扭转驱动器。该驱动器利用NiTi合金的单程形状记忆效应与回复弹簧的相互作用，实现驱动器在高低温状态下正反两向的扭矩输出。分析了驱动器的基本结构形式和驱动原理，探讨了NiTi合金驱动部件的设计方法和基本制备工艺。设计制作了驱动器原理样机，并测试了驱动器的输入输出特性。测试结果表明，该驱动器在给定的高低温环境（10～60℃）下能够在正反两个方向连续稳定地输出扭矩，最大行程范围为0～175°，最大输出扭矩达到0．33N·m。实测结果证明了驱动器设计方案与制备工艺的可行性。

One kind of plane turbination torque output actuator based on Ni-Ti SMA was introduced herein. This device could achieve forward and reverse torque output corresponding to the high and low temperature state with the interaction of the single trip memory effect of NiTi alloy and the recovery spring. First the basic structure and action principle were declared and the design approach and its basic preparation technology of SMA acting part were discussed. Then the principle prototype was designed and manufactured. The input-output characteristic test was processed. Testing results show that, the device could continuously and stably output torques under the condition of temperature state from 10 - 60 ℃. The maximum stroke range is as 0- 175°, and the maximum torque is 0.33 N · m. The results verify the feasibility of the design and preparation process of this device.