Sensor-actuator integration and self-sensing techniques for space constrained piezoelectric driven micro-positioners
department or school: Applied Science, Faculty of
department or school: Engineering, School of (Okanagan)
data provider: DSpace
degree campus: UBCO
creator: Zarif Mansour, Sepehr
issued: 2019-10-09T16:18:32Z
issued: 2019
related degree: Doctor of Philosophy - PhD
degree grantor: University of British Columbia
description: Piezoelectric actuators are commonly used in micro-positioning applications. However, they exhibit an inherent nonlinear relationship between their driving voltage and displacement, which is called hysteresis. To compensate for hysteresis, conventional control approaches use dedicated sensors that are often bulky and expensive. The main objective of this thesis is developing techniques to minimize the need for direct use of external sensors in micro-positioning work spaces. These techniques are categorized into two groups: 1- integrating actuators with dedicated sensors employed outside the actuators' work-space and 2- self-sensing, which is using an actuator simultaneously as a sensor. The first group consists of two techniques. The first technique moves the sensors from within a micro-positioning work-space to a location outside the work-space. The technique is experimentally validated, where about 1% average absolute errors are measured for both displacement and force. The second technique constructs strain gauges from top and bottom electrodes of a piezoelectric bender and uses them to measure the bender's tip displacement. The validation experiments show about 1% measurement error. The second group consists of three techniques. The first technique uses voltage and charge measurements of a piezoelectric actuator to estimate its displacement and force. The validation experiments show about 4% average absolute errors measured for both displacement and forces. The second technique refines the first technique by using a nonlinear capacitance and a novel exponential hysteresis operator. The experimental validations show about 2% and 3% average absolute errors for displacement and force respectively. The third technique is based on impedance measurement of a piezoelectric actuator. The presented technique measures the impedance at a mechanical resonance frequency and maps it to the displacement and force of the actuator. The experimental validation show about 3.7% and…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/71878
note: Sensor-actuator integration andself-sensing techniques for spaceconstrained piezoelectric drivenmicro-positionersbySepehr Zarif MansourB.A.Sc., University of Tehran, Iran, 2013M.A.Sc., The University of British Columbia, Canada, 2015A THESIS SUBMITTED IN PARTIAL FULFILLMENT OFTHE REQUIREMENTS FOR THE DEGREE OFDOCTOR OF PHILOSOPHYinThe College of Graduate Studies(Mechanical Engineering)THE UNIVERSITY OF BRITISH COLUMBIA(Okanagan)September 2019c© Sepehr Zarif Mansour, 2019The following individuals certify that they have read, and recommendto the College of Graduate Studies for acceptance, a thesis/dissertation en-titled:Sensor-actuator integration and self-sensing techniques for space con-strained piezoelectric driven micro-positionerssubmitted by Sepehr Zarif Mansour in partial fulfilment of the require-ments of the degree ofDoctor of PhilosophySupervisor Dr. Rudolf Seethaler, School of Engineering, UBC OkanaganSupervisory Committee Member Dr. Abbas Milani, School of Engineering, UBCOkanaganSupervisory Committee Member Dr. Homayoun Najjaran, School of Engineering,UBC OkanaganUniversity Examiner Dr. Thomas Johnson, School of Engineering, UBC OkanaganExternal Examiner Dr. Ridha Ben Mrad, University of TorontoiiAbstractPiezoelectric actuators are commonly used in micro-positioning appli-cations. However, they exhibit an inherent nonlinear relationship betweentheir driving voltage and displacement, which is called hysteresis. To com-pensate for hysteresis, conventional control approaches use dedicated sensorsthat are often bulky and expensive. The main objective of this thesis is de-veloping techniques to minimize the need for direct use of external sensorsin micro-positioning work spaces. These techniques are categorized into twogroups: 1- integrating actuators with dedicated sensors employed outsidethe actuators’ work-space and 2- self-sensing, which is using an actuatorsimultaneously as a sensor.The first group consists of two techniques. The first technique moves the…
has type: Thesis/Dissertation
date issued: 2019-11
is shown at: 10.14288/1.0383346
language: eng
degree discipline: Mechanical Engineering
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
type: Text
identifier URI: http://hdl.handle.net/2429/71878