Underactuated Gripper that is able to Convert from Precision to Power Grasp by a Variable Transmission Ratio
نویسندگان
چکیده
This paper investigates the possibility of converting grasped objects from precision grasps to power grasps using a variable transmission ratio for an underactuated finger. To this effect, a variable radius pulley was designed. A simulation study is presented to analyse grasping behaviour and a potential energy method is used to predict the equilibrium positions of finger and object. With this method stable and unstable equilibrium positions are determined. This is followed by an experiment to verify the theory. This paper is a first step in dextrous manipulation with large movements of objects using underactuated fingers.
منابع مشابه
M Gripper: Extending the Dexterity of a Simple, Underactuated Gripper
In the development of robotic hands, researchers have sought to increase inherent functionality without incurring greater complexity and cost. In this paper, we extend the manipulation capabilities of a simple gripper through a novel, underactuated design that produces several distinctive modes of operation. The proposed asymmetric hand design, the Multi-Modal (M) Gripper, consists of a modular...
متن کاملGripper: Extending the Dexterity of a Simple, Underactuated Gripper
In the development of robotic hands, researchers have sought to increase inherent functionality without incurring greater complexity and cost. In this paper, we extend the manipulation capabilities of a simple gripper through a novel, underactuated design that produces several distinctive modes of operation. The proposed asymmetric hand design, the Multi-Modal (M 2 ) Gripper, consists of a modu...
متن کاملGrasp analysis of a four-fingered robotic hand based on Matlab simmechanics
The structure of the human hand is a complex design comprising of various bones, joints, tendons, and muscles functioning together in order to produce the desired motion. It becomes a challenging task to develop a robotic hand replicating the capabilities of the human hand. In this paper, the analysis of the four-fingered robotic hand is carried out where the tendon wires and a spring return me...
متن کاملA Study of the Underactuated Mechanisms with Compliance
It is often suggested that hand prostheses and robot grippers must possess a kinematic structure that is similar to those of the natural human hand [1-4]. Such structure allows better adaptation of the gripper to the size and the shape of the grasped object and better cosmetic effect. Anthropomorphic hands with a large number of joints are highly dexterous, but their independent joint control r...
متن کاملJoint Coupling and Actuation Design of Underactuated Hands for Unstructured Environments
This paper examines joint coupling in underactuated robotic grippers for unstructured environments where object properties and location may not be well known. A simplified grasper consisting of a pair of two-link planar fingers with compliant revolute joints was simulated as it was actuated after contact with a target object. The joint coupling configuration of the gripper was varied in order t...
متن کامل