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Non-Linear Fuzzy Logic Control of a PWM Inverter with a Non-Linear Load

机译：带有非线性负载的PWM逆变器的非线性模糊逻辑控制

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Capacitor input filter loads (nonlinear) typically cause voltage distortion in DC to AC inverter waveshape. Non-linear Fuzzy Logic Control holds promise in reducing this compared with conventional PID control. Comparisons between nonlinear Fuzzy Logic Proportional Derivative controllers and conventional linear PID controllers are made by simulating a buck converter subjected to large step load current changes. It was found that the choice of freewheeling switch (uncontrolled diode or synchronous rectifier) is a major factor in improved output voltage control. Fuzzy Logic controllers are investigated as Arbitrary Transfer Characteristic Generators. Membership Function shape, degree of overlap, and number of overlaps, are examined, along with choice of Rule table values, as to the effect on the Transfer Characteristic of the controller. Results are presented as Transfer Characteristic plots, 3D control surface plots, Bode plots, and step response plots for the buck converter.
机译：电容器输入滤波器负载（非线性）通常会导致DC到AC逆变器波形中的电压失真。与传统的PID控制相比，非线性模糊逻辑控制有望减少这种情况。通过模拟承受较大阶跃负载电流变化的降压转换器，对非线性模糊逻辑比例微分控制器和常规线性PID控制器进行了比较。已经发现，选择续流开关（不受控制的二极管或同步整流器）是改善输出电压控制的主要因素。模糊逻辑控制器作为任意传递特征发生器而被研究。检查成员函数的形状，重叠程度和重叠数量，以及规则表值的选择，以了解对控制器传输特性的影响。结果以降压转换器的传输特性图，3D控制表面图，波特图和阶跃响应图的形式显示。

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