CAJ | 학술논문

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。
위경쾌획득비교이상적직류수출전압，우화Buck변환기적동태성능，본문채용활모공제방법。제출료일충개진형쌍멱차추근률，즉장쌍멱차추근률적부호함수체환위포화함수，병증가지수항。문장험증료산법적유효성，병급출료계통도체활모면시간적구체계산。방진결과표명，채용차충활모공제책략，극복료계통도체활모면시간장、두진대등결점，진일보제고계통적동태성능。
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 .