基于Buck变换器的滑模控制方法研究  

Research of Sliding Mode Control Method Based on Buck Converter

作　　者：李永恒[1] 梁青阳[1] 孙超[1] 

机构地区：[1]空军航空大学,长春130000

出　　处：《航空兵器》2014年第4期27-30,共4页Aero Weaponry

摘　　要：为更快获得比较理想的直流输出电压,优化Buck变换器的动态性能,本文采用滑模控制方法。提出了一种改进型双幂次趋近律,即将双幂次趋近律的符号函数替换为饱和函数,并增加指数项。文章验证了算法的有效性,并给出了系统到达滑模面时间的具体计算。仿真结果表明,采用此种滑模控制策略,克服了系统到达滑模面时间长、抖振大等缺点,进一步提高系统的动态性能。For faster to obtain ideal DC output voltage and optimize Buck converter dynamic perform-ance, this paper uses the sliding mode control method .A modified double exponential reaching law is proposed , which replaces symbol function into saturated function and adds an exponential term on the double exponential reaching law .The validity of the algorithm is verified and a method for calculating the arrival time of the control system is given .The simulation results show that this kind of sliding mode con-trol strategy overcomes the shortcomings of long reaching time and big chattering , and it also ensures dy-namic quality of the system .

关 键 词：BUCK变换器 滑模控制 改进型双幂次趋近律 

分 类 号：V37[航空宇航科学与技术—航空宇航推进理论与工程]