Title: Lyapunov-based bilateral teleoperation for surgical robotic forceps system with time varying delay

Authors: Chiharu Ishii; Hiroyuki Mikami; Yosuke Nishitani

Addresses: Department of Mechanical Engineering, Faculty of Science and Engineering, Hosei University, Tokyo 184-8584, Japan. ' Tadano Ltd., Kagawa 761-0185, Japan. ' Department of Mechanical Engineering, Faculty of Engineering, Kogakuin University, Tokyo 192-0015, Japan

Abstract: This paper addresses a new approach of bilateral control for a class of teleoperation systems with time-varying delay and its applications to bilateral teleoperation of robotic surgical device for minimally invasive surgery (MIS). A Lyapunov function-based bilateral control law for one-DOF teleoperation system that is capable of motion scaling in both position and force tracking is proposed so as to guarantee stability of the teleoperation system in the presence of time-varying delay. The proposed bilateral control law is adopted in vertical direction and horizontal direction for bending direction of the multi-DOF robotic forceps, respectively. Then, together with change of coordinates, the proposed bilateral control scheme is extended so that it may become applicable to bilateral control of omnidirectional bending of the multi-DOF robotic forceps manipulator incorporating a new screw-drive mechanism termed double-screw-drive mechanism. Thus, a scalable surgical device for MIS that can provide force feedback to surgeon is presented in this paper. In order to verify the effectiveness of the proposed bilateral control scheme, experimental works were carried out for the developed robotic forceps teleoperation test-bed for MIS.

Keywords: bilateral control; force feedback; robotic forceps; bilateral teleoperation; time-varying delay; surgical forceps; minimally invasive surgery; position tracking; force tracking; surgical robots.

DOI: 10.1504/IJMA.2012.048201

International Journal of Mechatronics and Automation, 2012 Vol.2 No.2, pp.132 - 146

Available online: 25 Jul 2012 *

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