Abstract
Implementation and Optimization of Two Degree of Freedom H∞ Loop Shaping Control for Average Current Mode Control Buck Converter using Genetic Algorithm
Highlights
A DC-DC buck converter has been widely used in several applications such as electrical applications from low to high voltage but with a low power rating owing to its simplicity
Four robust filters K1 and controllers K2 synthesized by different methods, such as the conventional 2DOF H∞ loop shaping control, the proposed technique, and Hankel reduction model (1st and 5th orders), were applied to the average current mode control (ACMC) buck converter voltage control system
We present the implementation of the voltage controller synthesized by the proposed technique called fixed structure 2DOF H∞ loop shaping control using genetic algorithm (GA)
Summary
A DC-DC buck converter has been widely used in several applications such as electrical applications from low to high voltage but with a low power rating owing to its simplicity. The required output voltage can be achieved by controlling the duty cycle of the controllable switch. Several control techniques that can synthesize the robust controller, such as the conventional H∞ loop shaping control and 2DOF H∞ loop shaping control with H2/H∞ mixed sensitivity,(1–4) have been applied to control the output voltage of the buck converter. Such techniques result in high-order robust controller structures causing impracticability of implementation in real systems. In a previous work,(7) the proposed technique called fixed structure robust 2DOF H∞ loop shaping control using GA solved all these problems.
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