Analysis and design of vehicle seat suspension based on bio-inspired structure and stewart platform

Pao Yue-kong Library Electronic Theses Database

Analysis and design of vehicle seat suspension based on bio-inspired structure and stewart platform

 

Author: Hu, Feizhou
Title: Analysis and design of vehicle seat suspension based on bio-inspired structure and stewart platform
Degree: M.Sc.
Year: 2016
Subject: Motor vehicles -- Vibration.
Motor vehicles -- Design and construction.
Hong Kong Polytechnic University -- Dissertations
Department: Dept. of Mechanical Engineering
Pages: xviii, 106 pages : color illustrations
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b2910923
URI: http://theses.lib.polyu.edu.hk/handle/200/8589
Abstract: Inspired by the nonlinear stiffness and damping characteristics of bio-inspired X-shape structure (XSS) with passive springs and Stewart platform with six degrees of freedom, a passive nonlinear vibration isolation XSS Stewart platform is designed and experimentally studied for its vibration isolation performance in all 6 directions. The 3-layer-asymmetrical X-shape structure is proposed to construct the Stewart platform which can physically avoid the motion interference among different Stewart legs. Because of the specially designed X-Shape Structure (XSS), the stiffness and damping properties of the system can be adjusted by changing structural parameters and thus it is designable to achieve an excellent performance including excellent stability and high-static-low-dynamic-stiffness isolation effect with satisfying loading capacity. On the basis of extensive experimental analysis of static stiffness and vibration response, it is revealed that, the XSS Stewart platform has very beneficial high static nonlinear stiffness which can provide power loading capacity, and the static nonlinear stiffness are adjustable and designable with structure parameters; (b) the platform has low dynamic stiffness in various direction which can achieve excellent vibration isolation in vertical direction, horizontal direction and rotational direction; (c) the good vibration isolation performance are designable with crucial structural parameters. The XSS Stewart platform has its advantages for vibration suppression and it can potentially be applied in different engineering practices for multi-direction better vibration isolation.

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