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Development of a Semi-Analytic Method to Estimate Forces Between Tool and Hand, Tool and Workpiece in Operation of a Hand-held Power Tool

Lim, Alvin
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1406808912

Abstract Details

2014, MS, University of Cincinnati, Engineering and Applied Science: Mechanical Engineering.
Hand-Arm Vibration Syndrome (HAVS) collectively refers to diseases associated with prolonged, intensive exposure to hand-transmitted vibrations. Millions of construction workers who use hand-held power tools are affected by HAVS in the United States. Numerous dynamic models of the hand-arm system were developed to better understand the injury mechanism. One of the problems in dynamic response analysis of the hand-arm system has been difficulty in finding the excitation forces generated by the operation of hand-held tools. Especially, the force transmitted to the hands from the tool and the force interacting between the tool and work-piece are very useful information in hand-arm vibration study; however, they cannot be measured directly. Methods to estimate these forces are developed in this work by utilizing a hand-arm model, the acceleration measured at the hand, and two measured transfer functions of the tool. Experimental validation procedures of the methods are devised, which show the estimated forces are accurate enough to be used for practical applications. The method developed in this work enables estimation of the force acting between the tool and workpiece in a hand-held power tool in operation for the first time. There are many potential applications of the method developed in this work. For example, the methods can be used to make design changes in the handle bar of a grinder to reduce vibration transmission to the hands, ultimately leading to a lower frequency of HAVS.
J. Kim, Ph.D. (Committee Chair)
Thomas Richard Huston, Ph.D. (Committee Member)
David Thompson, Ph.D. (Committee Member)
33 p.
Engineering
Hand Arm Vibration; HAVS; Semi-Analytic Method; Lumped parameter hand-arm model; Hand Trasmitted Force; Vibration Tool Reduction

Recommended Citations

Citations

  • Lim, A. (2014). Development of a Semi-Analytic Method to Estimate Forces Between Tool and Hand, Tool and Workpiece in Operation of a Hand-held Power Tool [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1406808912

    APA Style (7th edition)

  • Lim, Alvin. Development of a Semi-Analytic Method to Estimate Forces Between Tool and Hand, Tool and Workpiece in Operation of a Hand-held Power Tool. 2014. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1406808912.

    MLA Style (8th edition)

  • Lim, Alvin. "Development of a Semi-Analytic Method to Estimate Forces Between Tool and Hand, Tool and Workpiece in Operation of a Hand-held Power Tool." Master's thesis, University of Cincinnati, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1406808912

    Chicago Manual of Style (17th edition)

ucin1406808912
397
© 2014, all rights reserved.
This open access ETD is published by University of Cincinnati and OhioLINK.