{"id":{"repo_id":"nus","oai_identifier":"oai:scholarbank.nus.edu.sg:10635/15764"},"canonical_url":"https://search.dev.ndltd.org/etd/nus/oai:scholarbank.nus.edu.sg:10635/15764","repository":{"repo_id":"nus","name":"National University of Singapore","base_url":"https://scholarbank.nus.edu.sg/oai/request"},"display":{"title":"Disturbance attenuation with multi-sensing servo systems for high density storage devices","abstract":"Track densities in magnetic recording demonstrations for future HDDs (Hard-Disk Drives) are projected to exceed 500,000 TPI (Tracks-Per-Inch) in the year 2007 and are still increasing. However due to the renowned superparamagnetic limitation in magnetic recording physics, data storage industries are also looking into probe-based storage systems actuated by MEMS (Micro-Electrical-Mechanical-Systems) for high density nanometer scale recording. In this dissertation, novel control topologies incorporating multi- and self-sensing (employing the actuator as a sensor simultaneously) sampled-data servo systems are proposed with specific considerations on sensor fusion issues for actuator-sensor collocation and high SNR (Signal-to-Noise Ratio). Improved track-following performance in piezoelectric- and MEMS-actuated storage systems are achieved via stronger disturbance rejection capabilities and robustness of proposed control algorithms to fulfill data storage demands in future consumers' mobile electronic devices.","abstract_html":"Track densities in magnetic recording demonstrations for future HDDs (Hard-Disk Drives) are projected to exceed 500,000 TPI (Tracks-Per-Inch) in the year 2007 and are still increasing. However due to the renowned superparamagnetic limitation in magnetic recording physics, data storage industries are also looking into probe-based storage systems actuated by MEMS (Micro-Electrical-Mechanical-Systems) for high density nanometer scale recording. In this dissertation, novel control topologies incorporating multi- and self-sensing (employing the actuator as a sensor simultaneously) sampled-data servo systems are proposed with specific considerations on sensor fusion issues for actuator-sensor collocation and high SNR (Signal-to-Noise Ratio). Improved track-following performance in piezoelectric- and MEMS-actuated storage systems are achieved via stronger disturbance rejection capabilities and robustness of proposed control algorithms to fulfill data storage demands in future consumers' mobile electronic devices.","abstract_has_math":false,"creators":["PANG CHEE KHIANG"],"institution":null,"degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2007,"date_issued":"2007-03-05","date_published":"2007-03-05","updated_at":"2026-07-24T03:32:18Z","subjects":["Hard-disk drives, multi-sensing, probe-based storage systems, SSA (Self-Sensing Actuation), sampled-data systems, servo control"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":null,"outbound_label":null,"outbound_source":null},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["PANG CHEE KHIANG"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.issued","label":"Date","values":["2007-03-05"]},{"key":"dc:relation.isreferencedby","label":"Dc Relation Isreferencedby","values":["https://scholarbank.nus.edu.sg/handle/10635/15764"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Hard-disk drives, multi-sensing, probe-based storage systems, SSA (Self-Sensing Actuation), sampled-data systems, servo control"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://scholarbank.nus.edu.sg/bitstreams/419478dc-56d9-4efa-a5cc-c54cfcb5150c/download"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Track densities in magnetic recording demonstrations for future HDDs (Hard-Disk Drives) are projected to exceed 500,000 TPI (Tracks-Per-Inch) in the year 2007 and are still increasing. 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