摘要
针对DC-DC变换器中传统等速趋近律趋近时间长、抖振严重的问题,提出了一种新型趋近律控制方法,用于提高滑模变结构控制系统中趋近滑模面的速度、抑制滑模固有的抖振问题。同时,在传统的滑模电压控制(SMVC)的Buck变换器数学模型基础上,增加了电感电流状态变量,给出了Buck变换器数学模型。最后,利用新型趋近律对Buck变换器滑模控制器进行了设计,并且与PI控制器、等速趋近律方法进行了比较。仿真结果表明,所提的控制方法能够有效地提高系统的静态、动态特性与鲁棒性。
To solve the problems of long reaching time and serious chattering in DC-DC converter when a traditional constant-speed reaching law is used, a control method with a novel reaching law is proposed to improve the speed of reaching the sliding mode surface and inhibit the inherent chattering problem in the sliding mode variable structure con- trol system. Meanwhile, inductance current state ,variables are added based on a mathematical model of voltage step- down variator under the traditional sliding mode voltage control （SMVC）. Finally, a Buck converter sliding mode con- troller is designed using the new reaching law, and it is compared with PI controller and constant-speed reaching law method. Simulation results show that the proposed control method can effectively improve the static and dynamic charac- teristics of the system, as well as its robustness.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2018年第1期64-68,共5页
Proceedings of the CSU-EPSA
基金
国家自然科学基金资助项目(51479018
51709028)
中央高校基本科研业务费专项资金资助项目(3132016335
3132017004)
辽宁省自然科学基金资助项目(2070540082)
