Design and Control of Magnetic-driving Fiber-coupled System

The magnetic-driving fiber-coupled systems are one of the hot medical device research topics for the treatment of laryngeal cancer. However, its narrow steering scope limits its practical application. To address this issue, this paper proposes a novel magnetic-driving fiber-coupled system, which has a larger steering scope than its counterpart. And the current estimation equation of our system is derived so as to provide the corresponding current to the coils according to the desired magnetic field excitation. Based on the obtained current estimation equation, the PID controller is applied to the system laser scanning control. The effectiveness of the PID controller for the proposed system and the influence of the expansion of the steering scope on the PID control performance will also be given in this paper.