Fractional Order Glucose Insulin System Using Fractional Back-Stepping Sliding Mode Control

Document Type: Research Paper

Authors

1 Department of Electrical Engineering, Shahrood University of Technology, Shahrood, Iran

2 Department of Electrical Engineering, Ferdowsi University of Mashahd, Mashhad, Iran

10.22075/ijnaa.2019.4067

Abstract

In this paper, based on a fractional order Bergman minimal model, a robust strategy for regulation
of blood glucose in type 1 diabetic patients is presented. Glucose/insulin concentration in the patient
body is controlled through the injection under the patients skin by the pump. Many various con-
trollers for this system have been proposed in the literature. However, most of them have consider
the system as an integer order system. Moreover, the majority of the presented methods suffer from
an important disadvantage that is long settling time of the control system. Thus, the contribution of
this paper in comparison with previous related works is presenting a fractional back-stepping sliding
mode control that considerably reduces the required time for glucose to reach its desired level. Due
to the sliding mode design, the proposed controller is robust against external disturbances. Due to
the back-stepping design, convergence of each state variable of the system to its desired value can
be guaranteed separately. Simulation results verify the satisfactory performance of the proposed
controller.

Keywords