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Suboptimal algorithms for force distribution in multifingered grippers

机译:多指抓爪力分配的次优算法

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A method is presented which addresses the problem of determinating the appropriate distribution of forces among the fingers of a multifingered gripper grasping an object. The finger-object interactions are modeled as point contacts. The system is statically indeterminate, and an optimal solution for this problem is desired for force control. A fast and efficient suboptimal method for computing the grasping forces is presented. In addition to determining the equilibrating forces (the forces required to maintain equilibrium), it is essential to superpose interaction forces (the forces which squeeze the object) to ensure that the fingers do not slip. The decomposition of the equilibrating forces into forces perpendicular and parallel to the load wrench provides a useful simplification. If it is assumed that the normals to the object at the point of contract pass through the centroid of the contact points, the computations required to find the interaction forces are considerably simplified. Some simple grasps are used to evaluate the proposed algorithms.
机译:提出了一种方法,该方法解决了确定抓握物体的多指抓取器的手指之间的力的适当分布的问题。手指与对象的交互被建模为点接触。该系统是静态不确定的,因此需要针对此问题的最佳解决方案以进行力控制。提出了一种快速有效的抓力计算方法。除了确定平衡力(保持平衡所需的力)外,还必须叠加相互作用力(挤压物体的力)以确保手指不会打滑。将平衡力分解为垂直于负载扳手和平行于负载扳手的力可以简化操作。如果假定对象在收缩点的法线穿过接触点的质心,则可以大大简化寻找相互作用力所需的计算。一些简单的掌握可用于评估所提出的算法。

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