Robust Compansation for Voltage Mode Control of Boost Converter Using Discrete Time, 1-DOF, 2-Periodic Controller

It is evident from the mathematical model of the DC-DC boost converter that, it possesses a right half plane zero in its control-output transfer function. This paper investigates whether a Discrete time periodic controller can provide a superior robustness in controlling of DC-DC boost converter operating in continuous conduction mode (CCM) by virtue of its zero placement capability. The problem considered is in the context of robust control of non-minumum phase (NMP) system, i.e system with unstable zero in its dynamics. This paper makes an attempt by designing a 2-Periodic controller that employs a systematic 2-stage algorithm involving linear algebraic steps, to verify whether it is possible to relocate non-minimum phase zero of fixed frequency boost converter operating in CCM. This paper then then delves into the effectiveness of the algorithm to show improvement in transient behavior along with robustness through simulation results.