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Session 3432

DESIGN OF INTELLIGENT CONTROLLERS FOR DC-DC CONVERTERS IN UNDERGRADUATE ENGINEERING LABORATORY

Ahmed Rubaai, Mohamed Chouikha, Abdul Ofoli and Sahar Kaddah

Howard University Electrical and Computer Engineering Department 2330 6th Street, Northwest Washington, DC 20059

Abstract

The primary goal of this paper is to develop a vehicle through which undergraduate students may design smart controllers that employ artificial intelligence control tools. This goal can be achieved through the design and construction of intelligent (fuzzy-neural-network) controllers for dc-dc converter topologies, the design of an interface with particular emphasis on laboratory environment, and the design and testing of the different control topologies. The control structure integrates the ideas of fuzzy control system and neural network architecture into an intelligent process. The fuzzy control design is equipped with a learning algorithm to adjust the control angle (or duty ratio) so that the steady state error is minimized and a zero-voltage regulation is achieved. The student has the opportunity to assume the role of a control system designer, who is given the task of designing a cost effective yet flexible controller. The fundamentals governing the design, control and performance of the DC-DC converters are also illustrated. The entire system is built and tested in the laboratory by using off-the-shelf components and software. A comprehensive analysis of the principle of operation, design consideration and experimental implementation of the converter topologies with built-in intelligent controller is developed. A rapid response is expected when the proposed controller is actually implemented in a real-time mode.

1.0 Introduction

Choppers themselves are generally divided into two groups: step-down or buck converter and step-up or boost converter [1]. For buck converters with constant output voltage, it is always desirable that the output voltage remains unchanged in both steady state and transient operations whenever the supply voltage and/or load current are disturbed. This condition is known as zero- voltage regulation and it means that the output voltage is independent of the supply voltage and the load current. To achieve zero-voltage regulation, the choice of the control method plays a very critical role in the performance of converters. The most commonly used control method in “Proceedings of the 2004 American Society for Engineering Education Annual Conference & Exposition Copyright © 2004, American Society for Engineering Education”

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Rubaai, A. (2004, June), Design Of Intelligent Controllers For Dc Dc Converters In Undergraduate Engineering Laboratory Paper presented at 2004 Annual Conference, Salt Lake City, Utah. 10.18260/1-2--13310