modeling and control blood sugar levels in diabetics using sliding modes

Diseases such as diabetes caused by improper functioning of the human body systems are formed and today it has become one of the concerns of engineers and led to several models have been subject to control. these models are included from simple to complex models. simple models have limited parameters and detected with a simple test, but the models are complex structure, extensive and complex testing is needed to determine its parameters .the purpose of these models is to predict the overall behavior of the system when it is affected by perturbations. the most common equations are the ordinary differential equation (ode) and the delayed differential equation (dde). it takes some time to absorb insulin and change blood sugar levels, so using delays in models makes the model more accurate and reduces errors in blood sugar control. in this article, we briefly review the important mathematical models presented for the diabetic patient and the control method presented in this field.