University of Twente Student Theses


Modeling a Piezoelectric Inertial Stepping Turntable Using Bond Graphs

Schepers, Martin (2004) Modeling a Piezoelectric Inertial Stepping Turntable Using Bond Graphs.

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Abstract:The limits of the current hard disk technology are coming in sight. One of the projects which aims at overcoming these limits is the micro Scanning Probe Array Memory (µSPAM) project at the University of Twente. A main component in the µSPAM project is a stick-slip driven turntable, which is able to align an object (the read/write medium) with respect to another object (the read/write probes). In order to investigate the influence of different factors (e.g. size, materials) and to facilitate the future design of a controller, a model of the turntable has been developed. This report presents a bond graph model of the turntable which consists of submodels representing the main components of the turntable. The piezoelectric tubes have been modeled by variable spatial springs in combination with 2-port C-elements. The stick-slip motion has been modeled with the Generalized Maxwell Slip (GMS) friction model, implemented at the contact surfaces between the tubes and the table. In order to validate the developed bond graph model, measurements have been done on the real turntable which have been compared to simulations. The comparison shows that the general behaviour of the turntable is approximated by the developed model.
Item Type:Essay (Master)
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:53 electrotechnology
Programme:Electrical Engineering MSc (60353)
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