【作者】 吴忠； 史永丽；

【Author】 Wu Zhong Shi Yongli (School of Space Technology, Beijing University of Aeronautics and Astronautics, Beijing. 100083) (Department of Automatic Control, North China Institute of Technology, Taiyuan, 030051)

【机构】 北京航空航天大学宇航学院； 华北工学院自动控制系；

【摘要】 为克服非最小相位特性对控制器设计的影响,可把DC／DC升压变换器的输出电压控制问题转化为对电感电流的控制,并采用串级结构的控制器。控制系统的内环和外环皆采用自适应控制算法, 内环以电感电流为被控量,外环则以电容电压为被控量。此种结构的控制器不但可使被控系统获得良好的动态特性,而且对负载电阻、电容、电感、输入电压等参数变化有着很强的鲁棒性。对DC／DC升压变换器的仿真结果表明, 上述控制方案是可行的。更多还原

【Abstract】 In order to overcome the difficulties resulted from the non-minimum phase property of DC/DC boost converters, the control problem of the output voltage is transformed to inductor current control, and a cascade controller is adopted. Both the inner and the outer loop of the cascade controller adopt adaptive control algorithm based on parameter estimators. The inner loop takes the inductor current as the controlled variable, and the outer one takes the capacitor voltage as the controlled variable. This kind of controller not only can make the controlled system achieve excellent dynamic characteristics, but also have strong robustness to the variations of system parameters, such as load resistance, capacitance, inductance, and input voltage. Simulation results of a certain DC/DC boost converter indicate that the controller presented above is feasible.更多还原