Small,Low-Frequency,Electro-Mechanical Projector Design and Analysis.

摘要

Three types of transducers were mathematically modeled to gain knowledge of the potentials and limitations of alternating lead-and ceramic-staved cylinder transducers,curved bender bar transducers,and ribbed-cylinder flextensional transducers. It was determined that bandwidth of alternating lead-and ceramic-staved cylinders can be maximized through careful choice of material composition,ceramic thickness,length-to-diameter ratio,and stave geometry. Analysis of the curved bender bar transducer showed that a small,light-weight,low-power output transducer could be built with an in-air resonance frequency between 100and 500Hz. A ribbed-cylinder flextensional transducer is basically a low-frequency narrowband device but modifications can be made to the current design which will lower its first in-air resonance frequency and improve its reliability. (Author)