{"id":{"repo_id":"mit","oai_identifier":"oai:dspace.mit.edu:1721.1/42306"},"canonical_url":"https://search.dev.ndltd.org/etd/mit/oai:dspace.mit.edu:1721.1/42306","repository":{"repo_id":"mit","name":"MIT","base_url":"https://dspace.mit.edu/oai/request"},"display":{"title":"Characterization of the mechanical properties of tactors used in tactile displays","abstract":"Pancake motors used in a tactile display were analyzed to understand the characteristics of their operation, as well as to suggest improvements in the design of the display. The frequencies and forces produced by unencased and encased pancake motors were measured, and a motor model was formulated to simulate the motion of the motors. It was found that there was considerate variability between pancake motors, and it was proposed that this may be due to a varying damping coefficient. A viscoelastic substrate, named Skinsim, was selected based on mechanical tests to have similar material properties to skin. It was found that when the motors were mounted on Skinsim their frequency of vibration was reduced by 62%. Measurements of the effects of damping in Skinsim led to the recommendation that inter-tactor spacing on a tactile vest should be at least 60 mm if the display is to be used for precise tactor localization. Finally, a GPS device was integrated into the tactile display. This allows appropriate navigational commands to be sent to the user through the tactile vest, based on information about the user's location.","abstract_html":"Pancake motors used in a tactile display were analyzed to understand the characteristics of their operation, as well as to suggest improvements in the design of the display. The frequencies and forces produced by unencased and encased pancake motors were measured, and a motor model was formulated to simulate the motion of the motors. It was found that there was considerate variability between pancake motors, and it was proposed that this may be due to a varying damping coefficient. A viscoelastic substrate, named Skinsim, was selected based on mechanical tests to have similar material properties to skin. It was found that when the motors were mounted on Skinsim their frequency of vibration was reduced by 62%. Measurements of the effects of damping in Skinsim led to the recommendation that inter-tactor spacing on a tactile vest should be at least 60 mm if the display is to be used for precise tactor localization. Finally, a GPS device was integrated into the tactile display. This allows appropriate navigational commands to be sent to the user through the tactile vest, based on information about the user's location.","abstract_has_math":false,"creators":["Held, David (David A.)"],"institution":"Massachusetts Institute of Technology","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":"Massachusetts Institute of Technology. Dept. of Mechanical Engineering.","school":null,"contributors":[],"advisors":["Lynette A. Jones."],"committee_chairs":[],"committee_members":[],"year":2007,"date_issued":"2007","date_published":"2007","updated_at":"2026-07-22T22:21:27Z","subjects":["Mechanical Engineering."],"languages":["eng"],"rights":["M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. 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The frequencies and forces produced by unencased and encased pancake motors were measured, and a motor model was formulated to simulate the motion of the motors. It was found that there was considerate variability between pancake motors, and it was proposed that this may be due to a varying damping coefficient. A viscoelastic substrate, named Skinsim, was selected based on mechanical tests to have similar material properties to skin. It was found that when the motors were mounted on Skinsim their frequency of vibration was reduced by 62%. Measurements of the effects of damping in Skinsim led to the recommendation that inter-tactor spacing on a tactile vest should be at least 60 mm if the display is to be used for precise tactor localization. Finally, a GPS device was integrated into the tactile display. This allows appropriate navigational commands to be sent to the user through the tactile vest, based on information about the user's location."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["S.M."]},{"key":"dc:title","label":"Title","values":["Characterization of the mechanical properties of tactors used in tactile displays"]}]}],"canonical_facts":{"dc:contributor.advisor":["Lynette A. Jones."],"dc:contributor.department":["Massachusetts Institute of Technology. Dept. of Mechanical Engineering."],"dc:contributor.other":["Massachusetts Institute of Technology. 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A viscoelastic substrate, named Skinsim, was selected based on mechanical tests to have similar material properties to skin. It was found that when the motors were mounted on Skinsim their frequency of vibration was reduced by 62%. Measurements of the effects of damping in Skinsim led to the recommendation that inter-tactor spacing on a tactile vest should be at least 60 mm if the display is to be used for precise tactor localization. Finally, a GPS device was integrated into the tactile display. This allows appropriate navigational commands to be sent to the user through the tactile vest, based on information about the user's location."],"dc:description.degree":["S.M."],"dc:identifier.uri":["http://hdl.handle.net/1721.1/42306"],"dc:language.iso":["eng"],"dc:publisher":["Massachusetts Institute of Technology"],"dc:rights":["M.I.T. theses are protected by copyright. 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