%0 Journal Article
%T Research of a New 6-Dof Force Feedback Hand Controller System
%A Xin Gao
%A Yifan Wang
%A Jingzhou Song
%A Qingxuan Jia
%A Hanxu Sun
%J Journal of Robotics
%D 2014
%I Hindawi Publishing Corporation
%R 10.1155/2014/646574
%X The field of teleoperation with force telepresence has expanded its scope to include manipulation at different scales and in virtual worlds, and the key component of which is force feedback hand controller. This paper presents a novel force feedback hand controller system, including a 3-dof translational and 3-dof rotational hand controllers, respectively, to implement position and posture teleoperation of the robot end effector. The 3-dof translational hand controller adopts innovative three-axes decoupling structure based on the linear motor; the 3-dof rotational hand controller adopts serial mechanism based on three-axes intersecting at one point, improving its overall stiffness. Based on the kinematics, statics, and dynamics analyses for two platforms separately, the system applies big closed-loop force control method based on the zero force/torque, improving the feedback force/torque accuracy effectively. Experimental results show that self-developed 6-dof force feedback hand controller has good mechanical properties. The translational hand controller has the following advantages: simple kinematics solver, fast dynamic response, and better than 0.05£¿mm accuracy of three-axis end positioning, while the advantages of the rotational hand controller are wide turning space, larger than 1£¿Nm feedback, greater than 180 degrees of operating space of three axes, respectively, and high operation precision. 1. Introduction At present, the robot systems are widely used in hazardous operations, disaster, nuclear environment, deep sea, space, and other areas, which can replace humans in dangerous and extreme conditions to complete the tasks [1, 2]. When robots are working in special environment, the task usually requires high operating precision [3¨C5]. Due to the combination of human decision-making capacity and operational capability of robots in hazardous environment, teleoperation can complete complex and special tasks while making people away from the site [6, 7]. As an important interface used to build a close dynamic coupling between operators and robots, hand controller can send position, posture, and other information to the operation object. It can also accept the environmental information from control system, such as the force/torque, providing the operator with force telepresence and implementing effective interventions and control for robots [8]. In the teleoperation system, hand controller¡¯s performance has a direct impact on the operating performance and reliability of the bilateral control system [9, 10]. According to the structure form, hand
%U http://www.hindawi.com/journals/jr/2014/646574/