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针对DC/DC谐振变换器的稳定性分析,设计了一个直接分段仿射控制器.将受切换约束的切换系统与分段仿射系统结合,建立直接分段仿射系统模型:提出一种适应性的切换控制器:DPWA (Direct Piecewise Affine)控制器,并设计外环内环双闭环控制策略,利用LMI (Linear Matrix Inequality)方法求解,对DC/DC谐振变换器输出电压稳定性控制.进行仿真实验,实验中和其他两种控制器进行比较,实验图像和数据表明我们所设计的控制器具有良好的效果.“,”A direct piecewise affine controller has been designed for the stability analysis of DC-DC series resonant converter.Combined the constrained switching system with PWA system,the direct piecewise affine model has been established;An adaptive switching controller-DWPA controller is proposed,using inner and outer loops-double closed-loop strategy with LMI (Linear Matrix Inequality) approach for the output voltage stability control of DC-DC resonant converters.Finally the simulation experiment conducted has shown a good effect of the designed controller.The results obtained are compared with other two controllers.