抄録
In this paper, non-linear and bi-linear dynamic models including dominant dynamics of the pneumatic pressure and flow of the fuel cell system are derived. In addition, two-degree-of-freedom sliding mode control is designed using the linear time invariant state-space model which is derived from the non-linear model. The pre-compensator considering exhaust gas flow passing through a throttle valve is also designed. The pre-compensator shapes the pressure and flow references and makes the exhaust gas flow close to the desired flow which is passing through the throttle in transient response. Furthermore, the pre-compensator makes the references close to static references which appropriately operates the fuel cell system in a static state. The paper presents the architecture of the pre-compensator, considering the passing flow in transient state and the tracking performance to the static references. Finally, numerical calculations and experimental results verify that the non-linear model accurately simulates the actual system transient responses and the proposed techniques improve the transient responses of the pneumatic pressure and the flow of the fuel cell system.
