Tuning of digital PID controller for blood glucose level of diabetic patient

This paper is based on designing of digital Proportional-integral derivative (PID) controller which controls the blood glucose level of diabetic patient. The main objective is to design a digital PID controller using tuning rules like Ziegler-Nichols and Cohen-Coon method. The responses are studied & parameters are compared. Best response given by the PID is converted into Digital PID. Different transformation methods are also studied to convert the conventional PID into the digital PID controller.