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An evaluation of hand-arm system models used for vibrating tool analyses and test rig constructions.

Dong-RG; Welcome-DE; Wu-JZ; McDowell-TW
Inter-Noise 2006. The 35th International Congress and Exposition on Noise Control Engineering, December 3-6, 2006, Honolulu, Hawaii. West Lafayette, IN: International Institute of Noise Control Engineering, 2007 Aug; 4:2841-2850
Many biodynamic model structures or configurations of the hand-arm system have been proposed. The objectives of this study are to introduce a new model, to redefine the parameters of three typical models using newly published experimental data, and to assess their usefulness for vibration tool analyses and test rig constructions. To achieve these objectives, the traditional 2-DOF, 3-DOF, and 4-DOF and one new model proposed by the authors were used. The biodynamic responses to hand-transmitted vibration measured at the hand driving-point under a combined grip and push action were used to determine the parameters of the models using a least root-mean-square error curve fitting method. This study found that the new model and the 3-DOF and 4-DOF models fit the experimental impedance data extremely well. When judged using apparent mass, the 2-DOF model also fits the experimental data well. The natural frequencies and damping ratios resulting from these models are in reasonable ranges. The relative static deformations of these models are also acceptable for test rig construction. This study concluded that the new model provides the best choice for analyzing tools and for constructing hand-arm simulators. However, if the hand-tool dynamic interactions below 100 Hz are of major concern, the 2-DOF model is simpler and less expensive for the construction of a hand-arm simulator.
Biomechanics; Biomechanical-modeling; Analytical-processes; Models; Analytical-models; Biodynamics; Vibration; Vibration-effects; Vibration-exposure; Tools; Simulation-methods; Control-technology
National Institute for Occupational Safety and Health Engineering & Control Technology Branch 1095 Willowdale Road Morgantown, West Virginia 26505, USA
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Conference/Symposia Proceedings
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NIOSH Division
Priority Area
Disease and Injury: Musculoskeletal Disorders of the Upper Extremities
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Inter-Noise 2006. The 35th International Congress and Exposition on Noise Control Engineering, December 3-6, 2006, Honolulu, Hawaii.