直流变流器的输出反馈动态面控制  

Output Feedback Dynamic Surface Control of DC Converter

作　　者：刘陆[1] 王丹[1] 彭周华[1] 

机构地区：[1]大连海事大学轮机工程学院,辽宁大连116026

出　　处：《计算机仿真》2013年第9期225-229,共5页Computer Simulation

基　　金：国家自然科学基金资助项目(61273137;51209026;61074017);中央高校基本科研业务费专向资金(3132013037)

摘　　要：在直流变流器控制性能优化问题的研究中,针对负载不确定的Buck型直流变换器模型,采用自适应动态面方法设计控制器,使其输出电压能准确地跟踪参考电压,解决不确定负载对系统稳定性的影响和输入受限问题,另外本设计中的控制器无需测量电感电流,达到节约成本减少误差的目的。运用动态面法将一阶滤波器引入到反步法的设计中,克服传统反步法中方程项数的膨胀和复杂的求导问题,对系统不确定因素有良好的自适应性。设计状态观测器实现输出反馈控制,减少一个状态变量的测量。考虑输入受限问题,引入一个辅助控制变量,保证系统输入在指定范围内。由李亚普诺夫稳定理论证明该闭环系统是一致最终有界的,跟踪误差收敛在原点附近的较小邻域内,仿真结果验证了控制器的有效性。An adaptive output feedback dynamic surface control was proposed for the uncertain DC-DC buck converter,it tracks the reference output voltage accurately,resolves the effect of parameter uncertainty and input saturation problem.In addition,the controller in this paper can avoid the measurement of inductor current,thus can save the costs and reduce the errors.By introducing the first-order filters,a dynamic surface control method was proposed to cope with the ‘ explosion＇ problem caused by the backstepping-based design,and it has good adaptability for the parameter uncertainty.An observer was presented to estimate the unmeasurable state,so there is no need to measure the inductor current.By introducing an auxiliary control variable to ensure controller output within the specified range,an effective controller design method was developed.The proposed control law can guarantee the uniform ultimate boundedness of all signals in the closed-loop system via Lyapunov synthesis.Simulation results demonstrate the effectiveness of the controller.

关 键 词：直流变换器 动态面控制 输出反馈 输入受限 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]