Optimal Tuning of PID-Controlled Magnetic Bearing System for Tracking Control of Pump Impeller in Artificial Heart
Noaman M. Noaman, Ahmed Sharhan Gatea, Amjad J. Humaidi, Saleem Khalefa Kadhim, Alaq F. Hasan
Abstract
In this work, using optimal PID control for magnetic bearing in artificial heart pump, two magnetic bearings used to suspend the impeller rotor, the small air gap, high speed of rotor that important think to keep the life of the human that uses Artificial Heart Ventricle, the Artificial Heart Ventricle it the is the full-actuated system the state-space model developed for the control, choosing the value of parameter control very important, the performance of output depending on this parameter.This study presents an optimization algorithm based on PSO (particle swarm optimization) to optimize performance of Proportional Integral Derivative (PID) controller to magnetically hanging the rotary pump impeller of Artificial Heart Ventricle (AHV).The optimal controller's terms are obtained by minimization of fitness function which is defined based on the index Root Mean Square of Error (RMSE).The optimal values of control elements lead to optimal PID controller which results in optimal tracking performance of PID controlled bearing system.The numerical simulation has been conducted to verify the effectiveness of proposed controller.The results showed that the optimal controller could stabilize the impeller within small deviations in displacement and angular position.