针对普通PID控制难以应付移相全桥DC/DC变换器时变非线性的不足，提出采用模糊自适应PID控制的方法。该方法基于误差信号，对应模糊控制规则得出PID参数的实时修改量，对复杂系统具有一定的自适应性。利用Matlab/Simulink工具箱进行了普通PID控制和模糊自适应PID控制的系统建模，并对输入电压和负载突变情况进行了仿真。仿真结果验证了系统的可行性，通过对比表明模糊自适应PID控制在启动、负载突变等情况下动、静态性能均优于普通PID控制，提高了系统性能。%Since the traditional PID control is hard to solve time⁃varying nonlinear problem of phase⁃shifted full⁃bridge DC/DC converter,the method of using self⁃adaptive fuzzy⁃PID control is proposed. The real⁃time modifiers of PID parameters are ob⁃tained by fuzzy control rules corresponding to error signal. This method has certain adaptivity to complex system. The traditional PID control and self⁃adaptive fuzzy⁃PID control were conducted with system modeling by Matlab/Simulink toolbox,and the input voltage and load changes were simulated. The simulation results verify that this system is feasible. The static and dynamic perfor⁃mances of self⁃adaptive fuzzy⁃PID control are better than the traditional PID control in the situation of start⁃up and load changes. System performances were improved.
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