Show simple item record

dc.contributor.advisorYounis, Mohammad I.
dc.contributor.authorNiyazi, Alhammam
dc.date.accessioned2020-12-06T05:24:15Z
dc.date.available2020-12-06T05:24:15Z
dc.date.issued2020-11
dc.identifier.citationNiyazi, A. (2020). Multi-Threshold Bidirectional MEMS Inertial Switches. KAUST Research Repository. https://doi.org/10.25781/KAUST-43X6F
dc.identifier.doi10.25781/KAUST-43X6F
dc.identifier.urihttp://hdl.handle.net/10754/666265
dc.description.abstractIn this work, MEMS inertial switches intended to be triggered at multiple acceleration thresholds in two directions were implemented and proven effective. The switches consume virtually no power in their open switching state. Multiple acceleration thresholds can be beneficial in triggering different actions for different acceleration events. Low power consumption can aid in their use for portable applications such as in cycling helmets. The developed designs rely mainly on a suspended shuttle mass, which is used to implement one of two methods of actuation. The first relies on simple contact between the moving shuttle mass and a flexible electrode. In the second, the pull-in instability is induced by applying a voltage between a cantilever and an electrode, and then having the shuttle mass force the cantilever moving towards the electrode as it moves under the applied acceleration. Ten designs varying in their actuation method, suspension design, intended acceleration thresholds, and dimensions were modeled using a finite element model, fabricated, through the SOIMUMPs process, and then electrically and mechanically tested. Mechanical testing has been conducted using Drop-table tests and mechanical shakers. The simple contact devices were proven effective through shock test results showing triggering at two acceleration thresholds in two directions. Initial results also were promising for the pull-in based devices showing switching by moving their shuttle mass with a probe while applying appropriate voltage and observing under a microscope.
dc.language.isoen
dc.subjectMulti-treshold
dc.subjectMEMS
dc.subjectinertial
dc.subjectswitches
dc.subjectacceleration
dc.subjectshock
dc.titleMulti-Threshold Bidirectional MEMS Inertial Switches
dc.typeThesis
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.rights.embargodate2021-12-01
thesis.degree.grantorKing Abdullah University of Science and Technology
dc.contributor.committeememberFarooq, Aamir
dc.contributor.committeememberSalama, Khaled N.
thesis.degree.disciplineMechanical Engineering
thesis.degree.nameMaster of Science
dc.rights.accessrightsAt the time of archiving, the student author of this thesis opted to temporarily restrict access to it. The full text of this thesis will become available to the public after the expiration of the embargo on 2021-12-01.
kaust.request.doiyes


Files in this item

Thumbnail
Name:
AlHammamNiyaziThesis.pdf
Size:
3.567Mb
Format:
PDF
Description:
Thesis Alhammam
Embargo End Date:
2021-12-01

This item appears in the following Collection(s)

Show simple item record