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- W1913988894 abstract "Abstract Underactuated hands are able to achieve shape adaptation to conformally grasp a wide variety of objects, while keeping low undesirable hand attributes such as weight, size, complexity and cost. The available analytical and simulation studies of planar underactuated hands normally assume quasi-static conditions and a fixed object. In the present paper, a new quasi-dynamic analysis of the grasping process in the horizontal plane by a planar, two-finger, four-joint underactuated hand is presented. The study considers object movement during the grasping process, and also contact friction with a surface that supports the object. An extensive and versatile simulation program, based on the analysis, is developed to investigate the effects of various parameters of hand and object on the grasping process. A prototype hand has been developed and the simulation results are validated experimentally. An extensive and detailed study and optimization exercise is carried out using the developed simulation tool. Specifically, the study concerns a manipulative grasping process that moves the object to the hand centerline during the process. Important new findings on the influence of link dimensions, link angular speeds, friction with the supporting surface, object mass and object size on the grasping performance of the hand in this scenario are presented. The results are used to establish new design guidelines for the hand. In particular, the results indicate that in the case where there is limited information on the size and precise initial location of the object to be grasped, the optimal hand design would involve inner to outer phalange size ratios of approximately 3:1, and inner phalange joints that are very close to each other." @default.
- W1913988894 created "2016-06-24" @default.
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- W1913988894 date "2016-02-01" @default.
- W1913988894 modified "2023-09-23" @default.
- W1913988894 title "Quasi-dynamic analysis, design optimization, and evaluation of a two-finger underactuated hand" @default.
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- W1913988894 doi "https://doi.org/10.1016/j.mechatronics.2015.09.007" @default.
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