An adaptive fuzzy sliding mode control for minimally invasive surgical robot´s remote center mechanisms

Being the most important component of minimally invasive surgical robot system, remote centre mechanisms (RCM) composed of three joints, achieve the position and orientation adjustment of the surgical instrument inside a patient´s body. In order to implement the high-precision position control and eliminate the adverse effect result from the friction of RCM´s joints, in this paper, a fuzzy sliding mode controller with the friction compensation is designed. The result of simulation and experiment show that the controller designed can provide a trajectory tracking with real-time, high-precision performance and strong robustness.