Finite element simulation for a new disc-type ultrasonic stator

Area of Science:

• Mechanical Engineering
• Materials Science
• Electrical Engineering

Background:

• Piezoelectric ultrasonic stators are crucial for various actuation applications.
• Understanding the complex behaviors of disc-type piezoelectric structures is essential for optimizing performance.
• Existing models may not fully capture the dynamic and piezoelectro-mechanical characteristics of novel stator designs.

Purpose of the Study:

• To develop and validate a dynamic model for a new disc-type piezoelectric ultrasonic stator.
• To analyze the linear piezoelectric, mechanical, and piezoelectro-mechanical behaviors of the stator.
• To enable the realization of lateral elliptical motion for rotor drive.

Main Methods:

• Utilized a finite element method (FEM) to model the disc-type piezoelectric ultrasonic stator.
• Incorporated a 3-dimensional (3D) mechanical element with an electrical degree of freedom.
• Simulated dynamic vibration modes and analyzed electrical impedance, phase, and mechanical frequency responses.
• Defined adaptive boundary conditions, including simple support with three fixed points, for mechanism design.

Main Results:

• The FEM model successfully simulated dynamic vibration modes and characteristic responses.
• Analysis included electrical impedance, phase, and mechanical frequency responses.
• Experimental measurements validated the accuracy of the finite element analysis model.
• The model demonstrated similarity to real-world conditions.

Conclusions:

• The developed finite element model provides a reliable tool for analyzing disc-type piezoelectric ultrasonic stators.
• The model's accuracy is confirmed through experimental validation.
• The design facilitates lateral elliptical motion for effective rotor driving.
• This work contributes to the advancement of piezoelectric ultrasonic actuator technology.