Transient Response Optimization of Piezoelectric Disc Transducers by Time Domain Techniques.

摘要

The goals of this research have been to find and demonstrate design procedures for reducing the mechanical ringing of piezoelectric disc transducers under impulsive electrical excitation. The transducer has been treated as a three-port device: the two mechanical ports and one electrical port. Improvements to the transient response have been sought through the determination of appropriate matching networks at the ports. The optimization of specified time domain characteristics is accomplished by performing a gradient search over a parameter space defining the port matching configurations. It is assumed that only one mechanical port radiates into the acoustic medium. The transducer and mechanical matching sections are modeled using the Mason equivalent circuit and the distributed parameter wave guide model, respectively. Transformation to the time domain is achieved using a numerical approximation to the Laplace transform.