说明：  ：对全桥型逆变器的滑模控制方案进行了分析，包括建 立系统的变结构模型、选择滑模切换线和确定控制作用，给 出可到达条件及滑模存在区域等。着重讨论了在实际电路设 计中选择开关面系数和开关频率的原则，并且给出相应的设 计程序。
(A sliding mode control scheme for the full bridge buck inverter was analyzed, including modeling the variable structure system, selecting the switching line and control law, and deriving reaching conditions and sliding domain. The criterions of selecting switching surface coefficients and switching frequency for the practical implementation were considered and the corresponding design procedure was presented.)