Research on sliding mode control method for bidirectional DC/DC converter in special vehicle DC grid based on extended state observer

This article proposes an innovative control strategy–an improved sliding mode control method based on extended state observer (SMC+ESO)–for bidirectional DC/DC converters in special vehicle power systems facing system uncertainties such as constant power load disturbances and input voltage changes. The core of this method is first to design an extended state observer to accurately estimate the system state, constant power load disturbances, and changes in input voltage. Subsequently, based on these estimated values, sliding mode control technology is applied to design a sliding mode controller to ensure that the system can quickly and accurately track voltage.