Department of Engineering and Control Systems congratulates a lecturer academic after getting a certificate of doctorate from outside Iraq

Lecturer academic Dr. Tahgreed M. Mohammed Ridha who is working in control systems engineering department has got a PhD certificate from University of Ecole Centrale De nantes France as titled in :-  " Automatic Glycemia Regulation of Type I Diabetes "

Abstract :-

This thesis investigates closed-loop control for glycemia regulation of Type 1 Diabetes Mellitus (T1DM). Two maincontroller categories are designed: non-model-based and model-based. To test their efficiency, both types are tested in silico on two T1DM simulators.The first is a long-term model that is derived from clinical data of T1DM subjects and the second is thewell-known Uva/Padova simulator. Firstly, Model-free Control (MFC)is designed: a variable reference intelligent Proportional(iP) control and a constant reference intelligent Proportional-Integral-Derivative (iPID). Better overall performance is yielded with iPID over iP and over a classic PID. Secondly, a positive Sliding Mode Control SMC is designed for the first time for glycemia regulation.The model-based controller is chosen for glycemia regulation due to its well-known robustness properties.More importantly, our main contribution is that SMC is designed to be positive everywhere in the positivelycinvariant set for the plasma insulin subsystem.Finally, a positive state feedback controller is designed for the first time to regulate glycemia. The largest Positively Invariant Set (PIS) is found. Not only control positivity is respected but rather a tight glycemic control is achieved. When the system initial condition belongs to the PIS, hypoglycemia is prevented, otherwise future hypoglycemia is predicted for any initial condition outside the PIS.