Re: Statespace conversion to transfer func. for boost conver
switching converters esentially are nonlinear and time-varying circuits. so you need linearization about the dc value to decrease the problem to the linear case, and secondly to average the states and find lower frequency model.
I think one of the best reference for this matter is the famous book of Erickson
"Fundamental of power electronics"
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if you have not access to the book, you can find some useful paper about this matter in the website of Colorado Power Electronics Center
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