Risk assessment in control of fractional-order coronary artery system in the presence of external disturbance with different proposed controllers.

In this study, different controllers for control of fractional-order coronary artery system in the presence of external disturbance are designed. Using sliding mode, the proposed type 1 and type 2 fuzzy methods, the suitable controllers are proposed. In sliding mode control, a fractional sliding surface is presented and the control signal is modified to prevent chattering in the control system. With mathematical analysis, a type of membership function is suggested which has better performance in the fractional order system. Also, a rule-base is presented which leads to better results in type 1 and type 2 fuzzy controllers. The risk of the proposed controllers in different conditions is analyzed. Finally, according to the other analyzing methods, it is shown that this analyzing method has more accurate results.