Nonlinear control of a non-passive bilateral teleoperation in presence of unsymmetric time varying delay

This paper represents a controller design for nonlinear bilateral teleoperation systems. The proposed controller is used when both terminals of teleoperation system are considered to be non-passive. Moreover, the communication channel is subjected to unsymmetrical time varying delays. A good example of such systems is robotic telerehabilitation therapy in both assistive and resistive mode. The controller is comprised delayed position-position architecture and nonlinear adaptive controller to deal with parameters uncertainty in environment dynamic. On the other hand, a new Impedance reflection term is considered in the master controller for improving transparency. The stability of closed-loop teleopration system is established by a Lyapunov-Krasovskii function. Finally, the proposed scheme is utilized on a pair of planner 2-DOF robots to show performance and accuracy of the proposed controller.

[1]  Mark W. Spong,et al.  Bilateral teleoperation: An historical survey , 2006, Autom..

[2]  M. Motaharifar,et al.  A control methodology for single-master/multi-slave two-channel transparent teleoperation systems , 2011, The 2nd International Conference on Control, Instrumentation and Automation.

[3]  Mahdi Tavakoli,et al.  Revisiting Llewellyn's absolute stability criterion for bilateral teleoperation systems under non-passive operator or environment , 2012, 2012 IEEE/RSJ International Conference on Intelligent Robots and Systems.

[4]  Heidar Ali Talebi,et al.  Adaptive bilateral teleoperation of an unknown object handled by multiple robots under unknown communication delay , 2013, 2013 IEEE/ASME International Conference on Advanced Intelligent Mechatronics.

[5]  Dongjun Lee,et al.  Passive Bilateral Teleoperation With Constant Time Delay , 2006, IEEE Transactions on Robotics.

[6]  Romeo Ortega,et al.  Position Tracking for Non-linear Teleoperators with Variable Time Delay , 2009, Int. J. Robotics Res..

[7]  Mahdi Tavakoli,et al.  Position and force tracking in nonlinear teleoperation systems under varying delays , 2014, Robotica.

[8]  Peter Xiaoping Liu,et al.  New stability and tracking criteria for a class of bilateral teleoperation systems , 2014, Inf. Sci..

[9]  Peter Xiaoping Liu,et al.  Teleoperation Systems With Symmetric and Unsymmetric Time Varying Communication Delay , 2013, IEEE Transactions on Instrumentation and Measurement.

[10]  Heidar Ali Talebi,et al.  A position driftless, modified wave variable scheme for time varying delayed teleoperation system , 2011, The 2nd International Conference on Control, Instrumentation and Automation.

[11]  Mahdi Tavakoli,et al.  Adaptive Control of Uncertain Nonlinear Teleoperation Systems , 2014 .

[12]  Rajnikant V. Patel,et al.  Projection-based force reflection algorithms for teleoperated rehabilitation therapy , 2013, 2013 IEEE/RSJ International Conference on Intelligent Robots and Systems.

[13]  M. Motaharifar,et al.  An adaptive observer-based controller design for time-delay teleoperation with uncertainty in environment and parameters , 2011, Proceedings of the 2011 American Control Conference.