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dc.contributorDepartment of Mechanical Engineeringen_US
dc.contributor.advisorJing, Xingjian (ME)en_US
dc.creatorYu, Shihao-
dc.publisherHong Kong Polytechnic Universityen_US
dc.rightsAll rights reserveden_US
dc.titleAnalysis and optimal design of a multi-DOF vibration isolation platformen_US
dcterms.abstractIn this paper, a new quadruped 3-DOF vibration isolation platform based on bio-inspired X-shaped structure is studied. A three-layer X-shaped structure is adopted as legs to construct a passive platform. Because of the flexible X-shape structure, the stiffness and damping characteristics of the system can be adjusted by changing the structural parameters. Therefore, it can be designed to achieve excellent performance including stability and high-static-low-dynamic-stiffness isolation effect in z-axis translation and x-axis and y-axis rotation and bearing the target load in the vertical direction. The mechanic model is established and static analysis of the static stiffness, working range and loading capacity is studied in this paper. The analysis of the static stiffness and vibration response of the system shows that (a) the X-shaped structure platform has high static nonlinear stiffness, which can provide target loading capacity, as well as very low dynamic stiffness to achieve excellent vibration isolation performance; (b) compared with linear spring-damping system, the X-shaped-structure-based 3-DOF platform has much lower resonant frequency, which means a better vibration isolation performance; (c) both static and dynamic stiffness is adjustable and designable with structure parameters and very easy to implement.en_US
dcterms.extent60 pages : color illustrationsen_US
dcterms.isPartOfPolyU Electronic Thesesen_US
dcterms.educationalLevelAll Masteren_US
dcterms.LCSHDamping (Mechanics)en_US
dcterms.LCSHHong Kong Polytechnic University -- Dissertationsen_US
dcterms.accessRightsrestricted accessen_US

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Please use this identifier to cite or link to this item: https://theses.lib.polyu.edu.hk/handle/200/11446