December 7, 2021
Valiollah Ghaffari

Valiollah Ghaffari

Degree: Associate professor
Address: Persian Gulf University
Education: Ph.D in Electrical Engineering
Phone: 07733442269
Faculty: Faculty of Intelligent Systems and Data Science


Title A Robust H∞ Fault Tolerant Controller for Uncertain Systems Described by Linear Fractional Transformation Model
Type Article
Robust H∞ fault tolerant controller, uncertain control systems , linear fractional transformation , linear matrix inequality
Journal IEEE Access
DOI 10.1109/ACCESS.2021.3099528
Researchers Valiollah Ghaffari (First researcher) , Saleh Mobayen (Second researcher) , Sami Ud Din (Third researcher) , Andrzej Bartoszewicz (Fourth researcher) , Amin Torabi Jahromi (Fifth researcher)


In this article, a robust H∞ fault tolerant control law is addressed for a class of the uncertain dynamical systems represented via linear fractional transformation. To this objective, a state-feedback controller law is utilized for achieving the control objective. Thus, a linear matrix inequality based performance condition would be derived to guarantee that the disturbance suppression is accomplished in the uncertain system. Hence, the gains of the robust H∞ controller would be suitably determined by checking the feasibility of such a linear matrix inequality problem. The proposed control technique is numerically simulated in two dynamical uncertain systems (i.e., a typical control system and a mechanical robotic arm). Considering the disturbance rejections and transient responses, the results illustrate the efficiency of the recommended robust technique compared with the existing control methods.