MATLAB/Simulink-Based Robustness Analysis of a Boost DC-DC Converter

In this paper is presented MATLAB/Simulink base approach for robustness analysis of a power electronics devises. Analyzed problem is very important for design, control synthesis, maintains and operation of power electronic devices and systems. The process of robustness analysis is described in details step by step with example of Boost DC/DC converter with current mode control. For the purposes of the study, all active resistances of the circuit elements, except the resistance of the output capacitor (ESR), were neglected, as its significant influence on the stability of the power circuit was proved. Presented paper is done based on linearized model, which allows automated execution, without the need of special knowledge in mathematics and control system subjects. This is helpful for the students which don’t have very deep knowledge in the fundamental sciences to design power electronic devices with certain parameters and working conditions. On the other hands the presented results are giving opportunity for fast evaluation and fine tuning the parameters of the controller, which is useful for synthesis of optimal control.