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Boost电路的动态模型为非最小相位系统,其动态特性受电路参数和动态模型的影响较大。实际的Boost电路与建立的模型之间存在误差,使PID调节很难达到更优的效果。模糊自适应PID控制在输入量变化时其规则的利用率低,控制准确度变差。变论域模糊自适应PID控制通过伸缩因子提高被控系统的控制准确度,加快响应速度。将该控制方式用于Boost变换器闭环控制中,经仿真和实验表明,变论域模糊自适应PID控制具有快速响应、高准确度等优势。
The dynamic model of Boost circuit is a non-minimum phase system, whose dynamic characteristics are greatly influenced by the circuit parameters and dynamic model. There is an error between the actual Boost circuit and the established model, so that it is difficult to achieve better PID tuning effect. Fuzzy adaptive PID control in the input changes in the rules of its low utilization, poor control accuracy. Variable universe fuzzy adaptive PID control scalability factor to improve the accused system control accuracy and speed up the response speed. The control method is used in the closed-loop control of Boost converter. Simulation and experiment show that the fuzzy-adaptive PID control with variable domain has the advantages of fast response, high accuracy and so on.