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    Linear Variable Stiffness Mechanisms Based on Preloaded Curved Beams

    Source: Journal of Mechanical Design:;2014:;volume( 136 ):;issue: 012::page 122302
    Author:
    Wu, Yi
    ,
    Lan, Chao
    DOI: 10.1115/1.4028705
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: A machine with an internal variablestiffness mechanism can adapt its output force to the working environment. In the literature, linear variablestiffness mechanisms (LVSMs) are rarer than those producing rotary motion. This paper presents the design of a class of novel LVSMs. The idea is to parallel connect two lateral curved beams with an axial spring. Through preload adjustment of the curved beams, the output forcetodisplacement curves can exhibit different stiffness. The merit of the proposed LVSMs is that very largestiffness variation can be achieved in a compact space. The stiffness can even be tuned to zero by assigning the appropriate stiffness to the axial spring. LVSMs with pinned curved beams and fixed curved beams are investigated. To achieve the largest stiffness variation with sufficient linearity, the effects of various parameters on the force curves are discussed. Techniques to scale an LVSM and change the equilibrium position are introduced to increase the usefulness of the proposed design. Finally, the LVSMs are experimentally verified through prototypes.
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      Linear Variable Stiffness Mechanisms Based on Preloaded Curved Beams

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    contributor authorWu, Yi
    contributor authorLan, Chao
    date accessioned2017-05-09T01:10:49Z
    date available2017-05-09T01:10:49Z
    date issued2014
    identifier issn1050-0472
    identifier othermd_136_12_122302.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/155731
    description abstractA machine with an internal variablestiffness mechanism can adapt its output force to the working environment. In the literature, linear variablestiffness mechanisms (LVSMs) are rarer than those producing rotary motion. This paper presents the design of a class of novel LVSMs. The idea is to parallel connect two lateral curved beams with an axial spring. Through preload adjustment of the curved beams, the output forcetodisplacement curves can exhibit different stiffness. The merit of the proposed LVSMs is that very largestiffness variation can be achieved in a compact space. The stiffness can even be tuned to zero by assigning the appropriate stiffness to the axial spring. LVSMs with pinned curved beams and fixed curved beams are investigated. To achieve the largest stiffness variation with sufficient linearity, the effects of various parameters on the force curves are discussed. Techniques to scale an LVSM and change the equilibrium position are introduced to increase the usefulness of the proposed design. Finally, the LVSMs are experimentally verified through prototypes.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleLinear Variable Stiffness Mechanisms Based on Preloaded Curved Beams
    typeJournal Paper
    journal volume136
    journal issue12
    journal titleJournal of Mechanical Design
    identifier doi10.1115/1.4028705
    journal fristpage122302
    journal lastpage122302
    identifier eissn1528-9001
    treeJournal of Mechanical Design:;2014:;volume( 136 ):;issue: 012
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian