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    Modeling the Dynamics of Five-Axis Machine Tool Using the Multibody Approach

    Source: Journal of Manufacturing Science and Engineering:;2020:;volume( 143 ):;issue: 002::page 021012-1
    Author:
    Huynh, Hoai Nam
    ,
    Altintas, Yusuf
    DOI: 10.1115/1.4048854
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: A systematic modeling of multibody dynamics of five-axis machine tools is presented in this article. The machine is divided into major subassemblies such as spindle, column, bed, tool changer, and longitudinal and rotary drives. The inertias and mass center of each subassembly are calculated from the design model. The subassemblies are connected with elastic springs and damping elements at contact joints to form the complete multibody dynamic model of the machine that considers the rigid body kinematics and structural vibrations of the machine at any point. The unknown elastic joint parameters are estimated from the experimental modal analysis of the machine tool. The resulting position-dependent multibody dynamic model has the minimal number of degrees-of-freedom that is equivalent to the number of measured modes, as opposed to thousands used in finite element models. The frequency response functions of the machine can be predicted at any posture of the five-axis machine, which are compared against the directly measured values to assess the validity of model. The proposed model can predict the combined rigid body motion and vibrations of the machine with computational efficiency, and hence, it can be used as a digital twin to simulate its dynamic performance in machining operations and tracking control tests of the servo drives.
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      Modeling the Dynamics of Five-Axis Machine Tool Using the Multibody Approach

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4276137
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    contributor authorHuynh, Hoai Nam
    contributor authorAltintas, Yusuf
    date accessioned2022-02-05T21:41:10Z
    date available2022-02-05T21:41:10Z
    date copyright12/9/2020 12:00:00 AM
    date issued2020
    identifier issn1087-1357
    identifier othermanu_143_2_021012.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4276137
    description abstractA systematic modeling of multibody dynamics of five-axis machine tools is presented in this article. The machine is divided into major subassemblies such as spindle, column, bed, tool changer, and longitudinal and rotary drives. The inertias and mass center of each subassembly are calculated from the design model. The subassemblies are connected with elastic springs and damping elements at contact joints to form the complete multibody dynamic model of the machine that considers the rigid body kinematics and structural vibrations of the machine at any point. The unknown elastic joint parameters are estimated from the experimental modal analysis of the machine tool. The resulting position-dependent multibody dynamic model has the minimal number of degrees-of-freedom that is equivalent to the number of measured modes, as opposed to thousands used in finite element models. The frequency response functions of the machine can be predicted at any posture of the five-axis machine, which are compared against the directly measured values to assess the validity of model. The proposed model can predict the combined rigid body motion and vibrations of the machine with computational efficiency, and hence, it can be used as a digital twin to simulate its dynamic performance in machining operations and tracking control tests of the servo drives.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleModeling the Dynamics of Five-Axis Machine Tool Using the Multibody Approach
    typeJournal Paper
    journal volume143
    journal issue2
    journal titleJournal of Manufacturing Science and Engineering
    identifier doi10.1115/1.4048854
    journal fristpage021012-1
    journal lastpage021012-14
    page14
    treeJournal of Manufacturing Science and Engineering:;2020:;volume( 143 ):;issue: 002
    contenttypeFulltext
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