| Flatness-based control approach has become a powerful method for nonlinear control system due to transforming nonlinear system to differential flatness linear system. It can be designed by conventional control strategy such as PI regulator. Flatness control scheme many advantages such as stability, good dynamics, and robustness etc. It has attracted widespread attention recently.A novel differential flatness control strategy was proposed based on the research on several nonlinear control approaches. The differential flatness nonlinear control system has a good stability, good dynamics and applied to boost converter prototype centering on TMS320LF2812. Firstly, boost converter large and small signal model was structured and analyzed. The appropriate input and output variables was searched to acquire standard Differential Flatness Boost Converter (DFBC). Secondly, differential flatness control law was proposed based on Lyapunov energy function and validated by Barlalat lemma. The MATLAB simulink system was constructed to confirm the validity of the proposed control strategy.Finally, a100W Constant Power Source prototype of Differential flatness Boost Converter (DFBC) based on F2812Digital Control has been built in the laboratory. The experimental figures and data were presented to confirm the validity of the proposed control strategy. |
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