International Journal of Control, Vol.92, No.8, 1858-1869, 2019
Observer-based force reflecting robust coordination control for networked bilateral shared telerobotic system
This paper proposes observer-based output feedback force reflecting robust coordination control for networked bilateral shared telerobotic system with asymmetrical delay and uncertainty. We design state feedback-based force reflecting control algorithm provided that all the states are available for feedback. We then replace the unknown velocity states by model-free observer to develop output feedback-based force reflecting robust coordination control algorithm for bilateral shared autonomous system. The coordination control algorithm is designed by combining delayed position and velocity states with the reflected interaction forces from human and environment. Robust adaptive control theory is employed to deal with uncertainty. The stability analysis is shown by using Lyapunov method. The method does not require linear matrix inequality and uncertainty. Compared with other force reflection methods, the design uses reflected forces from both interaction between master and human and between slave and environment. Experimental results are presented to demonstrate the validity of the proposed design for real-time applications.