Blood glucose control using GA tuned fractional order and two degrees of freedom PID controllers

This paper deals with the design of genetic algorithm (GA) based fractional order control strategy for maintaining the glucose level of Type-I diabetic patients. Fractional order and two degree of freedom PID (2DOF FOPID) controllers are designed using GA. The fractional order provides two degrees of freedom which allows the simultaneous set point tracking and disturbance rejection. For better understanding the designed controllers, performance of designed controller is further analysed with a meal input as disturbance signal. The designed controllers are also tested for effectiveness and stability using several validation methods. The integer order PID controller is also designed for comparative study. The suggested controllers are tuned using GA. The result reveals that 2DOF FOPID controller proves to be more effective and stable than the other designed controllers.