Soft electromagnetic actuators
Soft electromagnetic actuators
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DOI：
10.1126/sciadv.abc0251
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发表时间：
2020-06-01
期刊：
影响因子：
13.6
通讯作者：
Kaltenbrunner, Martin
中科院分区：
文献类型：
--
作者：
Mao, Guoyong;Drack, Michael;Kaltenbrunner, Martin
200多年来，刚性电磁执行器以各种方式服务于我们的社会。然而，它们的笨重性质限制了与人类的密切合作。在这里，我们介绍了软电磁执行器(SEMA)，通过在弹性壳体中嵌入液体-金属通道来取代固体金属线圈。我们展示了对人类友好、简单、可伸展、快速、耐用和可编程的厘米级Semas，它可以驱动软鲨，与日常物品互动，或快速将染料与水混合。具有单独控制花瓣的多线圈花SEMA在数十毫秒内开花或闭合，立方形SEMA执行编程的任意运动序列。我们开发了一个数值模型，支持设计和开辟通向小型化、降低功耗和提高机械效率的潜在途径。Semas是一种电子控制的形状变形系统，可能会使未来的应用从柔软的夹持器到微创医学成为可能。
Rigid electromagnetic actuators serve our society in a myriad of ways for more than 200 years. However, their bulky nature restricts close collaboration with humans. Here, we introduce soft electromagnetic actuators (SEMAs) by replacing solid metal coils with liquid-metal channels embedded in elastomeric shells. We demonstrate human-friendly, simple, stretchable, fast, durable, and programmable centimeter-scale SEMAs that drive a soft shark, interact with everyday objects, or rapidly mix a dye with water. A multicoil flower SEMA with individually controlled petals blooms or closes within tens of milliseconds, and a cubic SEMA performs programmed, arbitrary motion sequences. We develop a numerical model supporting design and opening potential routes toward miniaturization, reduction of power consumption, and increase in mechanical efficiency. SEMAs are electrically controlled shape-morphing systems that are potentially empowering future applications from soft grippers to minimally invasive medicine.