|Title:||Analysis and optimal design of a multi-DOF vibration isolation platform|
|Advisors:||Jing, Xingjian (ME)|
Hong Kong Polytechnic University -- Dissertations
|Department:||Department of Mechanical Engineering|
|Pages:||60 pages : color illustrations|
|Abstract:||In 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.|
|Rights:||All rights reserved|
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|5923.pdf||For All Users (off-campus access for PolyU Staff & Students only)||1.67 MB||Adobe PDF||View/Open|
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