Abstract: The fuzzy variable structure-generalized common model control method was provided for DC-DC converter′s strong non-linear feature and to enhance its performance.By designing a GCMC controller,this method converts the strongly nonlinear system to the normally linear system.However,when the parameters of the DC-DC converter system were changed,the GCMC controller can not maintain the linear character of the system,so this paper contrive a FSMC controller to further enhance the system′s performance.This FSMC controller uses variable structure control to increase the robustness of the system,and while dealing whit the chattering problem it inducts the reaching law concept,and it also introduces the fuzzy control to further expedite the response time and weaken the chattering problem.The result of simulation indicates that the controller is workable with good robustness and good dynamic and static performance.

Key words: Generalized common model control , Relative degree , Fuzzy control , Variable structure control , Reaching law , MATALB simulation

摘要： 针对DC-DC变换器强非线性,提出了一种FSMC-GCMC控制方法,以增强对DC-DC变换器系统的控制效果。通过广义通用模型方法将强非线性系统转化为标准三阶线性系统并由此构成GCMC控制器。由于在DC-DC变换器参数改变情况下GCMC控制器将不能保持系统的线性特点,因此构造FSMC控制器,使用变结构控制增加系统的鲁棒性并利用模糊控制减少变结构控制的抖动并提高系统响应时间。通过仿真实验证明了该方法的可行性以及良好的动静态性能、较强的鲁棒性。

关键词: 广义通用模型 , 相对阶 , 模糊控制 , 变结构控制 , 趋近律 , MATLAB仿真