摘要
本文设计了一种线性自抗扰控制器,直接对DC/DC升压变换器的电感电流实施控制,以抑制系统非最小相位特性对控制性能的影响。在此基础上,外环采用一个PI控制器对输出电压进行控制,并把电压控制器的输出作为内环电感电流控制的参考输入。由于自抗扰控制器则是一种不依赖于系统模型的控制方法,因此被控系统不但具有良好的动态特性,而且对参数变化具有较强的鲁棒性。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。
In order to overcome the difficulties resulted from the non-minimum-phase property of DC/DC boost converters,a linear auto-disturbance-rejection controller（ADRC） is designed to control the inductor current directly.Simultaneously,the capacitor voltage is taken as the controlled variable in the outer loop employing and a PI controller to produce the reference for the inductor current control of the inner one.The controlled system not only has excellent dynamic characteristics,but also has strong robustness to the variations of system parameters since ADRC is independent of the model information.Simulation results of a certain DC/DC boost converter indicate that the controller presented above is feasible.
出处
《自动化技术与应用》
2011年第5期8-11,共4页
Techniques of Automation and Applications
关键词
DC/DC变换器
非线性系统
自抗扰控制器
DC/DC converters
nonlinear systems
auto-disturbance-rejection controller（ADRC）
