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Published on: August 2, 2016
Controlling of Applied Force and Cornea Displacement Estimation in Robotic Corneal Surgery With a Gripper Surgical
Ali Soltani Sharif Abadi1, Andrew Ordys2, Barbara Pierscionek3
1Institute of Electronic Systems, Faculty of Electronics and Information Technology, Warsaw University of Technology, Warsaw, Poland.
Background:
The human eye consists of highly sensitive, hydrated, and relatively thin tissues, making precise control and accurate force estimation crucial in robotic eye surgery. This paper introduces a novel control method and state observer designed for a gripper surgical instrument used on the external ocular surface during robotic eye surgery.
Methods:
A novel state observer, operating in tandem with the controller, estimates the applied force. The proposed control approach, termed the Fixed-time Observer-based Sliding Mode Control (FOSMC), estimates the applied force by determining the gripper states and uses an eye model to calculate its displacement.
Results:
The performance of the proposed control method was compared with two other finite-time and asymptotic techniques across two scenarios. The results demonstrated excellent performance using the proposed method.
Conclusions:
The FOSMC control technique effectively estimates the applied force during robotic eye surgery, making it a reliable solution for controlling the gripper surgical instrument.
