# Control System Design for Boost Converter

Hi guys,
I have this problem for my undergrad final year project. I'm trying to design a control system to regulate the voltage output for a boost converter and I am not too familliar with control theory.

I've built the control system in MATLAB based on the basic boost equation $$\frac{1}{1-D}$$=$$\frac{Vout}{Vin}$$ and partial differentiated it to get the small-signal relationship but it is still about 100V away from the setpoint. Furthermore, increasing the input voltage causes the output voltage to change.

I've attached the control system and the graph I obtained at around 350Vin. The setpoint is 750VDC

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