Abstract
Abstract This paper deals with the transfer functions of a new disc-type ultrasonic motor: stator and stator–rotor energy transformation. The objective is to initiate a mode that can produce certain relative dynamic responses in the proposed motor. The performance will be parameterized by system inputs in an attempt to obtain an optimal operational configuration. The transfer function model of the piezoelectric ultrasonic stator based on the lateral elliptical motion is derived for the control application and certification of its load-characteristic parameters and also predicts the motor performance. On this basis, we can determine whether the output of the motor will be stable. The contact-dynamics behaviors of the stator are also studied. These derived formulations in this paper are based on the general concept of the constitutive laws governing piezoelectric materials which permit the introduction of kinetic energy, electrical energy, and geometric constraints relating to the deformation variables.
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