Title :
Free vibration of piezoelectric bimorph actuators
Author :
Lau, C.W.H. ; Lim, C.W.
Author_Institution :
Dept. of Constr., Hong Kong Instn. of Vocational Educ. (Tsing Yi), Tsing Yi Island, China
Abstract :
A two-dimensional electromechanical coupling model is introduced to investigate the free vibration characteristics of piezoelectric bimorph actuators. Linear piezoelectric theory is adopted for the piezoelectric lamina. The natural frequency of the actuator is determined by using variational energy method and adopting the Ritz procedure with polynomial functions as the admissible functions to arrive at the governing eigenvalue equations. The natural frequencies of parallel and anti-parallel configurations of bimorphs are considered. Different geometric effects on the vibration response are also investigated.
Keywords :
piezoelectric actuators; variational techniques; vibrational modes; Ritz procedure; admissible functions; antiparallel configurations; free vibration; governing eigenvalue equations; linear piezoelectric theory; natural frequency; parallel configurations; piezoelectric bimorph actuators; piezoelectric lamina; polynomial functions; two-dimensional electromechanical coupling model; variational energy method; vibration response; Admittance; Aerodynamics; Buildings; Capacitive sensors; Differential equations; Electronic mail; Frequency; Piezoelectric actuators; Polynomials; Shape control; Free vibration; Ritz method; anti-parallel configuration; parallel configuration; piezoelectric bimorph; variation energy method;
Conference_Titel :
Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA) and 2009 China Symposium on Frequency Control Technology, Joint Conference of the 2009 Symposium on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-4950-7
DOI :
10.1109/SPAWDA.2009.5428901
