IJE TRANSACTIONS A: Basics Vol. 27, No. 1 (January 2014) 131-142   

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M. Sarvi, M. Derakhshan and M. Sedighi Zade
( Received: May 14, 2013 – Accepted: August 22, 2013 )

Abstract    In this paper, the immune controller, is used to control the paralleled DC-DC converters. A PID controller is first applied and its coefficient is optimized using an intelligent (PSO) algorithm. Immune controller is then added to PID controller and an immune PID controller is formed. Two methods have been suggested to determine non-linear behavior of immune controller. In the first method, an exponential function is suggested and its unknown coefficient is optimized using PSO algorithm. In the second method, fuzzy logic has been used. Performance of the proposed control methods in the presence of various disturbances is investigated over a sample paralleled DC-DC converter and the effectiveness of the applied immune controller is verified with the comparison of simulation results. The results show the improvement of system performance with Immune PID controller by the two suppression function in comparison with the PID controller.


Keywords    Parallel DC-DC converter, PSO PID Controller, Immune PID Controller, Fuzzy Immune PID Controller.


چکیده    در این مقاله، از کنترل کننده ایمن برای کنترل مبدل های DC-DC استفاده شده است. ابتدا یک کنترل کننده PID مورد استفاده قرار می گیرد و ضرایب آن با یک الگوریتم هوشمند (بهینه سازی اجتماع ذرات) بهینه می شود. سپس کنترل کننده ایمن به کنترل کننده PID اضافه می شود و یک کنترل کننده PID ایمن شکل می گیرد. دو روش برای تعیین رفتار غیر خطی کنترل کننده ایمن پیشنهاد می شود. در روش اول، یک تابع نمایی پیشنهاد می گردد و ضرایب آن با استفاده از الگوریتم PSO بهینه می شوند. در روش دوم، منطق فازی استفاده می شود. عملکرد روش های کنترل پیشنهادی در حضور اختلالات مختلف در یک مبدل DC-DC موازی نمونه بررسی می شود و کارایی کنترل کننده ارائه شده با مقایسه نتایج شبیه سازی مورد بررسی قرار می گیرد. نتایج نشان می دهند که کنترل کننده PID ایمن با دو روش پیشنهادی در مقایسه با کنترل کننده PID مشخصه سیستم را بهتر می کنند.



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