Control of DC-DC converters with pulse width modulation inputs

We consider a stabilization problem of DC-DC switching converters whose control input is given by pulse width modulation (PWM). In order to stabilize the DC-DC switching converter, this system is discretized. The discretized system is a nonlinear system for control input which is a duty ratio. Then, it is important to robustly stabilize an uncertain fixed point existed in the nonlinear system. In previous researches, it is investigated that steady-state blocking zeros of a stabilizing controller play an important role. Such a controller is called a washout controller. In this paper, we use washout control for locally stabilization of DC-DC converters.