Optimal energy density piezoelectric bending actuators
Optimal energy density piezoelectric bending actuators
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DOI：
10.1016/j.sna.2004.10.024
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发表时间：
2005-04-13
影响因子：
4.6
通讯作者：
Fearing, RS
中科院分区：
文献类型：
--
作者：
Wood, RJ;Steltz, E;Fearing, RS
压电致动器的设计和分析很少针对小质量应用进行优化。然而，新兴技术，如微型飞行器和微型机器人一般，需要高力，高位移，低质量的致动器。通用压电陶瓷和高性能复合材料的利用与几何形状和新颖驱动技术的智能使用相结合，产生了用于这种应用的低成本、快速原型化、超高能量密度的弯曲致动器。该设计是基于叠层多晶片悬臂梁致动器的层压板理论模型，包括所有可能的layups，层各向异性，内部和外部激励，以及内在和外在的几何形状。利用这些原则，我们已经制造了12毫克PZT双压电晶片驱动器大于2 J kg（-1）的能量密度。与现有的市售压电弯曲致动器相比，这给出了一个数量级或更大的性能增加。(c)2004 Elsevier B. V.保留所有权利。
The design and analysis of piezoelectric actuators is rarely optimized for low mass applications. However, emerging technologies such as micro air vehicles, and microrobotics in general, demand high force, high displacement, low mass actuators. Utilization of generic piezoceramics and high performance composite materials coupled with intelligent use of geometry and novel driving techniques yields low cost, rapidly prototyped, ultra-high energy density bending actuators for use in such applications. The design is based upon a laminate plate theory model for a stacked multimorph cantilever actuator, encompassing all possible layups, layer anisotropies, internal and external excitations, and intrinsic and extrinsic geometries. Using these principles, we have fabricated 12 mg PZT bimorph actuators with greater than 2 J kg(-1) energy density. This gives a performance increase of an order of magnitude or greater compared to existing commercially available piezoelectric bending actuators. (c) 2004 Elsevier B.V. All rights reserved.