Hamid Reza Ghorbani - Department of Electrical Engineering, Mashhad Branch, Islamic Azad University, Mashhad, Iran
Reihaneh Kardehi Moghaddam - Department of Electrical Engineering, Mashhad Branch, Islamic Azad University, Mashhad, Iran
S. Ehsan Razavi - Department of Electrical Engineering, Mashhad Branch, Islamic Azad University,Mashhad, Iran

Power electronic converters have been considered by many researchers and their control and robustness under various operating conditions has a great importance. The proposed type-2 fuzzy controller employs expert experience to control the power electronic converters, considering to their non-linear and time variant structure. Using type-2 fuzzy controller enhances the stability and robustness of system. This paper s attempt is to compare general and interval type-2 fuzzy controllers in terms of dealing with non-linear uncertain plants. It is shown that general type-2 fuzzy controller leads to more accuracy in comparison with interval type-2 and type-1 fuzzy controllers in regulating the output voltage, as it is shown in simulation part. To compare the performance of the controlling methods, the Euclidean norm of regulating error is calculated.

buck-boost, power electronics converters, interval fuzzy type-2, general fuzzy type-2, Voltage Regulator