This thesis reports a study on the characteristics of some piecewise - smooth classical systems . the systems studied are a model of an rlc circuit with an analogy switch and a model of an electronic circuit with over - voltage protection and a dissipative element 本论文报道对一些分段光滑经典系统的研究,涉及两个分段光滑经典系统:一个带模拟开关的rlc电路模型和一个带耗散性元件的过电压保护电路模型。