说明：  该模型描述的是zeta变换器。控制方式为电感电流控制。分析在一组参数下的非线性现象，画出相图，时域图，观察从周期一到周期二最后进入混沌状态
(The model describes the zeta converter. Control mode for inductance current control. Analysis in a group of parameters of the nonlinear phenomenon, draw the phase diagram, time domain chart, observation from cycle to cycle a second finally into chaotic state )