To regulate blood glucose of a diabetic patient; artificial pancreas is used to externally infuse insulin in the patient body. This work presents the design and analysis of the nonlinear controller that enables the automatic regulation of blood glucose level in type-1 diabetic patients.
We have proposed a Lyapunov based nonlinear Backstepping controller. In Berman’s Minimal Model, the meal disturbance phenomenon is considered as fixed value. One of the enhancements that we have introduced is the annexure of the variable meal disturbance as a dynamic state to the existing BMM. The asymptotic stability of the system is proven via mathematical analysis using Lyapunov theory.
To demonstrate the performance of the proposed controller, simulations are carried out through MATLAB/Simulink and results of the proposed controller has been compared with PID controller.
The propsed nonlinear controller enables the automatic regulation of blood glucose level far better than PID controller.