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首页> 外文会议>Thirteenth International Conference on Adaptive Structures and Technologies; Oct 7-9, 2002; Potsdam, Germany >COMPACT HYBRID ACTUATOR BASED ON THIN-FILM SHAPE MEMORY ALLOY
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COMPACT HYBRID ACTUATOR BASED ON THIN-FILM SHAPE MEMORY ALLOY

机译：基于薄膜形状记忆合金的紧凑型混合执行器

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摘要

In this paper, a thin film nickel-titanium SMA was used to develop a prototype compact hybrid actuator. SMA was selected as an actuating mechanism because it has the highest work density among active materials. Combining this attribute with high frequency response of thin films resulted in large specific power output. The actuator reached a drive frequency of 80Hz while achieving specific power of 27900 Watts/kg from the SMA film and 2.93 Watts/kg from the actuator. Higher specific power could be obtained by reducing the actuator weight through optimization. In any case, CFD analysis revealed that the pump chamber had to be redesigned to change the flow profile because the present design created non-circulating dead zones immediately adjacent to the membrane. Therefore by redirecting the liquid flow to directly cool the SMA membrane could improve performance of the actuator.
机译：在本文中，薄膜镍钛SMA被用于开发原型紧凑型混合执行器。 SMA之所以被选作驱动机构，是因为它在活性材料中具有最高的工作密度。将此属性与薄膜的高频响应相结合，可获得较大的比功率输出。该执行器达到了80Hz的驱动频率，同时从SMA膜获得的比功率为27900瓦/千克，从执行器获得的比功率为2.93瓦/千克。通过优化减少执行机构的重量，可以获得更高的比功率。在任何情况下，CFD分析都表明必须对泵室进行重新设计以更改流量曲线，因为本设计会在紧邻膜的位置产生非循环的死区。因此，通过重定向液体流以直接冷却SMA膜可以提高执行器的性能。

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