Using kinematic reduction for studying grasping postures. An application to power and precision grasp of cylinders
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Otros documentos de la autoría: Jarque-Bou, Néstor J; Gracia-Ibáñez, Verónica; Sancho-Bru, Joaquin L.; Vergara, Margarita; Pérez-González, Antonio; Andres-Esperanza, Javier
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Mostrar el registro completo del ítemcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7035
comunitat-uji-handle3:10234/8617
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Título
Using kinematic reduction for studying grasping postures. An application to power and precision grasp of cylindersAutoría
Fecha de publicación
2016Editor
ElsevierISSN
0003-6870; 1872-9126Cita bibliográfica
JARQUE-BOU, N., et al. Using kinematic reduction for studying grasping postures. An application to power and precision grasp of cylinders. Applied Ergonomics, 2016, vol. 56, p. 52-61Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://www.sciencedirect.com/science/article/pii/S0003687016300370?np=yPalabras clave / Materias
Resumen
The kinematic analysis of human grasping is challenging because of the high number of degrees of freedom involved. The use of principal component and factorial analyses is proposed in the present study to reduce the ... [+]
The kinematic analysis of human grasping is challenging because of the high number of degrees of freedom involved. The use of principal component and factorial analyses is proposed in the present study to reduce the hand kinematics dimensionality in the analysis of posture for ergonomic purposes, allowing for a comprehensive study without losing accuracy while also enabling velocity and acceleration analyses to be performed. A laboratory study was designed to analyse the effect of weight and diameter in the grasping posture for cylinders. This study measured the hand posture from six subjects when transporting cylinders of different weights and diameters with precision and power grasps. The hand posture was measured using a Vicon® motion-tracking system, and the principal component analysis was applied to reduce the kinematics dimensionality. Different ANOVAs were performed on the reduced kinematic variables to check the effect of weight and diameter of the cylinders, as well as that of the subject. The results show that the original twenty-three degrees of freedom of the hand were reduced to five, which were identified as digit arching, closeness, palmar arching, finger adduction and thumb opposition. Both cylinder diameter and weight significantly affected the precision grasping posture: diameter affects closeness, palmar arching and opposition, while weight affects digit arching, palmar arching and closeness. The power-grasping posture was mainly affected by the cylinder diameter, through digit arching, closeness and opposition. The grasping posture was largely affected by the subject factor and this effect couldn't be attributed only to hand size. In conclusion, this kinematic reduction allowed identifying the effect of the diameter and weight of the cylinders in a comprehensive way, being diameter more important than weight. [-]
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Applied Ergonomics, 2016, vol. 56Derechos de acceso
© 2016 Elsevier Ltd and The Ergonomics Society
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info:eu-repo/semantics/openAccess
http://rightsstatements.org/vocab/InC/1.0/
info:eu-repo/semantics/openAccess
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