title: Coupled torsional and longitudinal vibrations of piezoelectric fiber actuator with helical electrodes.
abstract: The vibration characteristics of a piezoelectric fiber actuator with helical electrodes are studied theoretically and experimentally. Its working principle indicates that the torsional, longitudinal, and tangential deformations of the fiber are coupled. A simplified dynamic model is deduced to investigate the properties of the coupled vibrations and their corresponding equivalent circuits are also provided. Resonant frequencies and mechanical coupling coefficients in free-free boundary condition are calculated. The trends of resonant frequencies as functions of the electrode helical angle and fiber length are discussed and validated in experiments.
authors.affiliation: Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui, People’s Republic of China.
authors.forename: Cheng Liang
authors.initials: CL
authors.lastname: Pan
authors.forename: Zhi Hua
authors.initials: ZH
authors.lastname: Feng
authors.forename: Yu Ting
authors.initials: YT
authors.lastname: Ma
authors.forename: Wei Wei
authors.initials: WW
authors.lastname: Shao
authors.forename: Yong Bin
authors.initials: YB
authors.lastname: Liu
mesh_terms: D000162:Acoustics / Q000295:instrumentation; D000465:Algorithms; D017076:Computer-Aided Design / Q000295:instrumentation*; D004566:Electrodes; D004581:Electronics / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D019563:Mechanics; D015203:Reproducibility of Results; D014159:Transducers; D014732:Vibration