Bionic eye system based on fuzzy adaptive PID control

The core of building bionic eye system is to imitate the function of human eye neural circuit so as to design the corresponding control strategy. In this paper, fuzzy adaptive PID control method is adopted to realize the function similar to vestibular nucleus´. Besides, the transfer function of controlled object is established according to medical research so as to determine the variation range of PID parameters in MATLAB environment. In the end, this control strategy is applied to the real bionic eye system based on the spherical parallel mechanism and plenty of experiments are conducted which show quick-response performance and robustness of the control system that conforms to human eye motion control mechanism.