MODELING OF PIEZOELECTRIC CERAMIC VIBRATORS INCLUDING THERMAL EFFECTS.4. DEVELOPMENT AND EXPERIMENTAL EVALUATION OF A BOND GRAPH MODEL OF THE THICKNESS VIBRATOR

This article develops a model of the piezoelectric ceramic vibrator wh ich includes thermal energy exchange on an equal footing with the elec trical and mechanical energy. By use of an isentropically linear model for the material and the bond graph models for a piezoelectric thickn ess vibrator and heat conduction previously developed by the authors, a thermodynamically complete model is developed. For a simple case, th e predicted results from the developed model are compared with the res ults from experiments. Predictions are found to compare very favorably with these measurements. (C) 1997 Acoustical Society of America.