Actuator environmental stability
Actuator environmental stability
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执行器环境稳定性
DOI：
10.1117/12.388861
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
M. Farrell
中科院分区：
文献类型：
--
作者：
S. Yoshikawa;M. Farrell
市场上有各种配置的压电高应变致动器。高温下湿度的影响没有得到很好的记录，即使它是致动器性能的重要考虑因素。本文介绍了两种不同系列的执行器的测试和结果; QuickPack产品和多层执行器，在两种环境下进行测试;室温低湿度和高温高湿（80°C/80%RH）。QP 10 N和QP 10 Ni产品在自由状态下施加恒定的直流负载，而多层致动器在预应力条件下仅施加正的交流电场。高场IR被用作确定QuickPack产品健康状况的主要工具，而原位位移被测量以监测多层致动器的健康状况。正如预期的那样，在这两个家庭的致动器，它表明，致动器的寿命显着减少时，试样暴露在高温下的湿度。改进防潮层，从而即使当电极不含银时也能减少湿气渗透，这有望延长致动器的寿命。
Various configurations of piezoelectric high strain actuators are available in the market. The influence of humidity at high temperature is not well documented, even though it is an important consideration for actuator performance. This paper describes the testing and results of two different families of actuators; QuickPack products and multilayer actuators, tested under two environments; room temperature low humidity and elevated temperature and humidity (80°C/80%RH). A constant DC load was applied to the QP10N andand QP10Ni products in free condition, while positive only AC field was applied to multilayer actuators, under pre-stressed condition. High field IR was used as the main tool to determine the health of QuickPack products, whereas, in-situ displacement was measured to monitor the health of multilayer actuators. As expected, in both families of actuators, it was shown that the actuator life is significantly reduced when specimens are exposed to humidity at elevated temperature. Improvement of the humidity barrier, thus less moisture penetration, even when electrodes do not contain silver, is expected to prolong life of actuators.