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dc.contributor.advisorAzad, A.K.M. Abdul Malek
dc.contributor.authorAhmed, Mazid Ishtique
dc.date.accessioned2022-03-01T05:20:44Z
dc.date.available2022-03-01T05:20:44Z
dc.date.copyright2021
dc.date.issued2021-12
dc.identifier.otherID 12261002
dc.identifier.urihttp://hdl.handle.net/10361/16367
dc.descriptionThis thesis is submitted in partial fulfilment of the requirements for the degree of Master of Science in Electrical and Electronic Engineering, 2021.en_US
dc.descriptionCataloged from PDF version of thesis.
dc.descriptionIncludes bibliographical references (pages 70-78).
dc.description.abstractThe electro-hydraulic servo system (EHSS) is a common tool in a variety of modern-day industrial applications that mostly deal with aviation and vehicle manufacturing and operation. In this thesis, an electro-hydraulic servo system is presented which bears the characteristics of non-minimum phase (NMP) phenomenon. A discrete-time transfer function for investigating the EHSS-NMP features has been estimated using a revamped mathematical model of the EHSS with respect to existing model parameters. An optimal control strategy is then formulated based on discrete linear quadratic regulator (DLQR) that seemingly, optimizes the control issues associated with EHSS affected by NMP behavior. A comparative analysis shows that the EHSS stability response improves with the DLQR, but the NMP behavior still persists. This thesis also tries to identify parametric uncertainties through a comprehensive mathematical model of EHSS. The modeling constraints are then investigated to propose a finite frequency robust control technique to actuate an active suspension load subjected to road disturbances. Using various performance criteria, simulation results are able to determine an optimum trade-off between robust control and rejecting road disturbances at higher deflection frequencies. As a result, these studies have demonstrated that the proposed control technique may overcome the parametric uncertainties of an EHSS-driven active suspension load.en_US
dc.description.statementofresponsibilityMazid Ishtique Ahmed
dc.format.extent84 pages
dc.language.isoenen_US
dc.publisherBrac Universityen_US
dc.rightsBrac University 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.
dc.subjectEHSSen_US
dc.subjectNMPen_US
dc.subjectDLQRen_US
dc.subjectUncertaintiesen_US
dc.subjectRobusten_US
dc.subjectActive suspensionen_US
dc.subject.lcshHydraulic servomechanisms.
dc.subject.lcshControl system
dc.titleStability analysis of a non-minimum phase Electro-Hydraulic Servo System (EHSS) and identification of parametric uncertaintyen_US
dc.typeThesisen_US
dc.contributor.departmentDepartment of Electrical and Electronic Engineering, BRAC University
dc.description.degreeM. Electrical and Electronic Engineering


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