A new view on grasping
A new view on grasping
复制标题
DOI：
10.1123/mcj.3.3.237
复制
发表时间：
1999-07-01
期刊：
影响因子：
1.1
通讯作者：
Brenner, E
中科院分区：
文献类型：
--
作者：
Smeets, JBJ;Brenner, E
伸手去拿一个物体通常被描述为由两个基于不同视觉信息的组件组成。关于物体的位置和方向的信息引导手到物体，而关于物体的形状和大小的信息决定了手指如何相对于拇指移动以抓住它。我们提出了一种替代描述，它包括确定物体上的合适位置-基于其形状，表面粗糙度，以此类推--然后或多或少独立地将拇指和手指移动到这些位置。我们使用最小加加速度的方法来模拟这种描述，从而手指和拇指接近其各自的目标位置近似正交于表面。我们的模型预测了实验变量，如物体大小，移动速度，脆弱性和所需的精度将如何影响手的最大孔径的时间和大小。对抓握实验研究的广泛回顾表明，预测的影响与人类行为相对应。
Reaching out for an object is often described as consisting of two components that are based on different visual information. Information about the object's position and orientation guides the hand to the object, while information about the object's shape and size determines how the fingers move relative to the thumb to grasp it. We propose an alternative description, which consists of determining suitable positions on the object-on the basis of its shape, surface roughness, and so on-and then moving one's thumb and fingers more or less independently to these positions. We modeled this description using a minimum-jerk approach, whereby the finger and thumb approach their respective target positions approximately orthogonally to the surface. Our model predicts how experimental variables such as object size, movement speed, fragility, and required accuracy will influence the timing and size of the maximum aperture of the hand. An extensive review of experimental studies on grasping showed that the predicted influences correspond to human behavior.