Degree Type

Thesis

Date of Award

2020

Degree Name

Master of Science

Department

Mechanical Engineering

Major

Mechanical Engineering

First Advisor

Juan Ren

Abstract

Atomic force microscope (AFM), scanning tunnel microscope (STM), precision robotic manipulator, etc. have been used widely for various applications. These systems undoubtedly perform the task with micro-level accuracy of operations. Note that in these applications, the use of piezoelectric actuators (PEA) is ubiquitous. The desired high-resolution and better accuracy by such instruments/ systems can be easily achieved by the use of PEA owing to its desired properties such as high precision, quick response, better stability, high stiffness, etc. These properties make PEA the best choice in the applications which demand a micro-nano level of accuracy in the operations. Though PEA is suitable in critical applications and systems requiring high accuracy, PEA exhibits undesirable nonlinearities due to its hysteresis and creep behavior. These nonlinearities significantly bound the accuracy of operation by PEA and, consequently, the use of PEA. To tackle the effect of hysteresis, creep and other nonlinearities exhibited by PEA, modeling and control of PEA are essential. The model based control approaches are, specifically, effective in achieving the desired level of performance, especially in tracking applications. However, modeling accuracy and linearization losses are the factors responsible for the compromise in the desired performance.

DOI

https://doi.org/10.31274/etd-20200902-118

Copyright Owner

Mayur Shivaji Patil

Language

en

File Format

application/pdf

File Size

89 pages

Available for download on Saturday, August 28, 2021

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