基于FPGA的开关电源模糊滑模控制器研究

Research on Fuzzy Sliding Mode Switching Power Supply Controller Based on FPGA

设计了一种将模糊控制和传统滑模变结构控制相结合的模糊滑模变结构控制器。该控制器简化了模糊控制器的输入,同时柔化了控制信号,减轻了一般滑模变结构控制的抖振现象。仿真结果表明,所设计的模糊滑模变结构控制器与一般滑模变结构控制器相比,具有更好的控制效果、鲁棒性和动态性能,有效降低了抖振。利用现场可编程门阵列(FPGA)实现了所研究的数字控制器,并对高频开关电源样机进行了有效控制,证明了所提方法的有效性。

A fuzzy sliding mode variable structure controller which combines traditional sliding mode variable structure control and fuzzy control is designed.The controller simplifies fuzzy controller input, softens the control signal, and re- duces the chattering of conventional sliding mode variable structure control.The simulation results show that the fuzzy sliding mode variable structure controller compared to the sliding mode variable structure controller has better control effect, stronger robustness and better dynamic performance, and effectively reduces the chattering.The effective control of high frequency switching power supply prototype is realized by using the studied digital controller on field pro- grammable gate array（FPGA）.h is proved that the proposed method is effective.