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首页> 外文期刊>Aerospace science and technology >Development of bi-stable and millimeter-scale displacement actuator using snap-through effect for reciprocating control fins
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Development of bi-stable and millimeter-scale displacement actuator using snap-through effect for reciprocating control fins

机译：利用卡扣效应开发双稳态和毫米级位移执行器，以使控制鳍片往复运动

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摘要

A new two-step amplifying mechanism combining a lever-arm with flexure hinges and a pre-curved thin shell structure is proposed to make a millimeter-scale linear actuator. A large amplification ratio can be obtained by the snap-through effect of a post-buckled shell structure without losing actuation force. The snap-through phenomenon of pre-curved thin-plate are numerically analyzed by using the finite-element software ABAQUS to specify the trigger force and displacement required to initiate the snap-through. The analytic results are in good agreement with the test results for the pre-curved shell structure. The trigger force and displacement for snap-through are supplied by the lever-arm with the piezo stack actuator. Amplification ratio of the lever-arm is drastically changed according to the external load. The lever-arm mechanism is designed to have enough actuation force and displacement to satisfy requirements such as trigger force and displacement of the bi-stable structure. The components of the designed actuators are manufactured and integrated. The designed two-step amplified actuator is experimentally validated to operate with an 8 mm stroke and 2 Hz bandwidth.
机译：提出了一种新的两步放大机构，该机构将杠杆臂与挠性铰链和预弯曲薄壳结构相结合，以制造毫米级线性致动器。通过后屈曲的壳体结构的搭接效应可以获得大的放大率，而又不会损失致动力。通过使用有限元软件ABAQUS数值分析预弯曲薄板的卡扣现象，以指定触发卡扣所需的触发力和位移。分析结果与预弯曲壳结构的测试结果非常吻合。杠杆臂通过压电叠层执行器提供触发力和卡扣位移。杠杆臂的放大率根据外部负载而急剧变化。杠杆臂机构设计为具有足够的致动力和位移，以满足触发力和双稳态结构位移等要求。设计的执行器的组件已制造并集成在一起。设计的两步放大执行器经过实验验证，可以在8 mm冲程和2 Hz带宽下工作。

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