This study proposed a novel robotic gripper that can achieve grasping and infinite wrist twisting motions using single actuator. The is equipped with differential gear mechanism allows switching between the according to magnitude of tip force applied finger. motion activated when below set value, exceeds this value. “Twist grasping,” special mode wrapping flexible thin object around fingers gri...

Various robotic exoskeletons have been proposed for hand function assistance during activities of daily living (ADL) of stroke survivors. However, traditional exoskeletons involve the use of complex rigid systems that impede the natural movement of joints, and thus reduce the wearability and cause discomfort to the user. The objective of this paper is to design and evaluate a soft robotic glove...

We report on our development of sensorized fingernails for mechatronical hands. Our proposed design can capture static and dynamic interaction forces with the nail and provide basic information about the direction of the main force vector. Over the course of several iterations, we have developed a very compact working prototype that fits together with our previously developed multi cell MID-bas...

INTRODUCTION One of a surgeon's most important tools is a highly developed sense of touch. Surgeons rely on sensations from the finger tips to guide manipulation and to perceive a wide variety of anatomical structures and pathologies. Unfortunately, new surgical techniques separate the surgeon's hands from the surgical site. These techniques include minimally invasive procedures such as laparos...

Underactuated robotic hands are favorable for some applications due to its simplicity in mechanism and control compared with fully actuated hand. Incorporating sensors makes it possible for a hand to accomplish low level task autonomously. This project aims at analyzing pinch quality of an underactuated hand that was developed for underwater teleoperation with 8 sensor channels on each finger, ...

In this paper, the problem of motion coordination of redundant multifingered robotic hands is considered. A kinematic model is introduced, which allows the object pose to be computed from the joint variables of each finger as well as from a suitable set of contact variables. Hence, a local planning method for dexterous manipulation, based on a prioritized inverse kinematics scheme with redundan...

Multifingered robotic hands are attempts to approximate human hand characteristics and functionality, and it is reasonable to consider their possible adaptation and use in prosthetics and rehabilitation. The Belgrade/USC robot hand is used as a prototype prosthetic hand in order to evaluate a system that translates task-level commands into motor commands. Our system, PRESHAPE, uses the virtual ...

Precise teleoperation of deztrous robotic hands b y hand masters requires an accurate human hand model. A kinematic model of a human index finger is developed as an example for human hand modeling. The parameters of the model are determined b y open-loop kinematic calibration. Singular value decomposition is used as a tool for analyzing the kinematic model and the identification process. Accura...

This paper presents a task-based analysis on the number of independent robotic fingers required for compliant manipulations. Based on the stiffness relation between operational space and fingertip space of a multi-fingered object manipulating system, we describe a technique for modulation of the fingertip stiffness without inter-finger coupling so as to achieve the desired stiffness specified i...

This survey reviews computational algorithms for generating 3D objects grasps with autonomous multi-fingered robotic hands. Over the past 20 years, grasping has been an increasingly active research area. Existing papers focus on reviewing the mechanics of grasping and the finger-object contacts interactions [21] or robot hand design and their control [4]. Robot grasp synthesis algorithms has be...