Low-field and high-field characterization of THUNDER actuators
Low-field and high-field characterization of THUNDER actuators
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DOI：
10.1117/12.432779
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发表时间：
2001-07
期刊：
影响因子：
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通讯作者：
Z. Ounaies;K. Mossi;Ralph C. Smith;J. Bernd
中科院分区：
文献类型：
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作者：
Z. Ounaies;K. Mossi;Ralph C. Smith;J. Bernd
THUNDER（THin Unimorph DrivER）驱动器是NASA LaRC开发的预应力压电器件，具有增强的应变能力。因此，它们在各种航空航天应用中受到关注。为了优化它们的操作，需要表征它们作为电场、温度和频率的函数的性能。为此，从FACE国际公司获得了许多THUNDER装置，其具有厚度从1密耳到20密耳变化的不锈钢基底。对各种器件进行了评估，以确定低场和高场位移以及极化磁滞回线。这些驱动程序的热稳定性进行了评估，通过两种不同的方法。首先，在测量位移的同时，通过将最高温度从25摄氏度系统地增加到200摄氏度，在电场下对样品进行热循环。其次，在空气中在0 ℃、50 ℃、100 ℃和150 ℃下等温老化样品，并在室温下测量位移的等温衰减作为时间的函数。
THUNDER (THin Unimorph DrivER) actuators are pre-stressed piezoelectric devices developed at NASA LaRC that exhibit enhanced strain capabilities. As a result, they are of interest in a variety of aerospace applications. Characterization of their performance as a function of electric field, temperature and frequency is needed in order to optimize their operation. Towards that end, a number of THUNDER devices were obtained from FACE International Co. with a stainless steel substrate varying in thickness form 1 mil to 20 mils. The various devices were evaluated to determine low-field and high-field displacement as well as the polarization hysteresis loops. The thermal stability of these drivers was evaluated by two different methods. First, the samples were thermally cycled under electric field by systematically increasing the maximum temperature from 25 degree(s)C to 200 degree(s)C while the displacement was being measured. Second, the samples were isothermally ages at 0 degree(s)C, 50 degree(s)C, 100 degree(s)C, and 150 degree(s)C in air, and the isothermal decay of the displacement was measured at room temperature as a function of time.