Modal measurements and model corrections of a large stroke compliant mechanism

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    1 Citation (Scopus)
    140 Downloads (Pure)

    Abstract

    In modeling flexure based mechanisms, generally flexures are modeled perfectly aligned and nominal values are assumed for the dimensions. To test the validity of these assumptions for a two Degrees Of Freedom (DOF) large stroke compliant mechanism, eigenfrequency and modeshape measurements are compared to results obtained with a flexible multibody model. The mechanism consists of eleven cross flexures and seven interconnecting bodies. From the measurements 30% lower eigenfrequencies are observed than those obtained with the model. With a simplified model, it is demonstrated that these differences can be attributed to wrongly assumed leaf spring thickness and misalignment of the leaf springs in the cross flexures. These manufacturing tolerances thus significantly affect the behavior of the two DOF mechanism, even though it was designed using the exact constraint design principle. This design principle avoids overconstraints to limit internal stresses due to manufacturing tolerances, yet this paper shows clearly that manufacturing imperfections can still result in significant different dynamic behavior.
    Original languageEnglish
    Title of host publicationECCOMAS Multibody Dynamics 2013, 1-4 July, University of Zagreb, Croatia
    Place of PublicationZagreb
    PublisherECCOMAS
    Pages831-843
    Publication statusPublished - 1 Jul 2013
    EventMultibody Dynamics 2013: ECCOMAS Thematic Conference - Zagreb, Croatia
    Duration: 1 Jul 20134 Jul 2013

    Publication series

    Name
    PublisherECCOMAS

    Conference

    ConferenceMultibody Dynamics 2013
    Country/TerritoryCroatia
    CityZagreb
    Period1/07/134/07/13

    Keywords

    • 2020 OA procedure

    Fingerprint

    Dive into the research topics of 'Modal measurements and model corrections of a large stroke compliant mechanism'. Together they form a unique fingerprint.

    Cite this