Details

Autor(en) / Beteiligte

• Yeom, Taiho
• Simon, Terrence W.
• Zhang, Min
• North, Mark T.
• Cui, Tianhong

Titel

High frequency, large displacement, and low power consumption piezoelectric translational actuator based on an oval loop shell

Ist Teil von

• Sensors and actuators. A. Physical., 2012-04, Vol.176, p.99-109

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2012

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• ► A compact piezoelectric actuator based on an oval loop shell structure was fabricated and investigated. ► An electrical power input to the piezoelectric stack actuator was measured to demonstrate high dynamic performance of the actuators with low power consumption. ► A possible application of the actuator as a cooling device was demonstrated. Compact piezoelectric actuators based on an oval loop shell structure were fabricated and their vibration characteristics were investigated. The actuators can successfully create a translational motion at a high frequency and a large displacement working distance at the second resonant mode of the shell structure. As a result of a shot peening process to harden the surface and increase the strength of the shell structures, fatigue limits were enhanced. The highest operating frequency of 1444Hz was achieved with about 1.5mm translational displacement under an applied voltage of 100 VAC. The largest amplified displacement of 2.1mm was obtained at a resonant frequency of 961Hz. Displacement amplification ratios between static and resonance conditions are presented and compared. A theoretical approach was provided to estimate the natural frequencies of the oval loop shell actuators. The estimated natural frequencies of the actuators agreed with experimental values to within 12%. In addition, load bearing capacity and efficiency of one of the shell actuators was evaluated with an experimental method. The calculated actuator efficiency is around 55% when 3.1g of mass is loaded to the actuator and an applied voltage of 140V is applied. A possible application of the actuator, a cooling device, was demonstrated by providing its configuration and test results.