中文摘要：

为改善DC／DC升压变换器的控制性能，在电流模式控制的基础上，设计一个非线性PI控制器对输出电压进行调节。控制器包含两部分，一部分为电感电流的比例控制，可以保证被控系统的稳定运行；另一部分为电容电压的线性比例控制和非线性积分控制，可以保证输出电压准确跟随期望电压。该控制器保留了电流模式控制的优点，结构简单，易于实现，并能克服系统非最小相位特性对控制性能的影响。同时，由于引入了输出电压的非线性积分，可以有效缩短过渡过程，提高稳态精度，并对参数变化有着很强的鲁棒性。对某DC／DC升压变换器的实验结果表明，所提控制器是可行的。

英文摘要：

In order to improve the control performance of DC/DC Boost power converters, a nonlinear proportional and integral controller was designed to regulate the output voltage based on current mode. This controller consists of two parts, one is a proportional control of the inductor current to stabilize the controlled system, the other is a linear proportional control plus a nonlinear integral control of the capacitor voltage to track the desired output. This controller retains the same advantages as the conventional current mode controllers on simple structure, easy implementation, and strong ability to deal with the problems resulted from the non-minimum-phase properties. It also can shorten the transient process, improve the steady-state accuracy, and have strong robustness to the variations of system parameters due to the nonlinear integral feedback of the output voltage. Experimental results of a certain DC/DC Boost converter indicate that the controller presented above is feasible.