STATIC AND DYNAMIC RESPONSE ANALYSIS OF PIEZOELECTRIC ACTUATORS BY MEANS OF ELECTROMECHANICALLY COUPLED FINITE ELEMENT

• Main Author: Khalid Aulia, Darryl
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/70304
• Institution: Institut Teknologi Bandung

In the present work, computational analyses on the piezoelectric-based actuator are conducted. Piezoelectric materials are able to generate force from electrical charge and vice versa. Thus, the piezoelectric material is widely used as electromechanical sensors and actuators. As an actuator, the utilization of piezoelectric material provides several benefits, i.e., exceptional precision and minimal operational space. Over the years, much research has been done on piezoelectric modeling. The finite element approach is one of the evaluation techniques. The current work focuses on the computational evaluation of piezoelectric-based actuators by means of electromechanically coupled finite elements. Commercial finite element software is utilized in this study. The current study investigates static and dynamic cases of piezoelectric-based actuators. A unimorph and multilayer beam-bending actuator are evaluated. An analytical method is employed for the multilayer actuator to validate the computational results. Both results agreed well, with a maximum variance of less than 6 %. For the unimorph case, the experimental results of a piezoelectric-based sensor are used to verify the finite elements' electromechanical characteristics. Frequency response analysis of the sensor's voltage reading is evaluated. The voltage responses are well agreed upon, particularly within the span of the first and second bending fundamental frequencies. Furthermore, computational analysis is also conducted for the unimorph structure as an actuator, with driving voltages as the main loading to the structure. Keywords: Finite element, electromechanically coupled, static, dynamic, unimorph, multilayer