模糊自适应PID控制电压型逆变器的研究

Research on voltage source inverter of fuzzy adaptive PID control

电压型逆变器在各个领域中广泛应用,而高质量的输出波形要求稳态精度高和动态响应快。一般逆变器传递函数不易得到,电压输出经常波动,常规PID控制器难以达到控制要求。为了得到更高质量的输出波形,采用模糊自适应控制与PID控制相结合的控制方法,对其进行实时控制。对模糊自适应PID的算法进行了介绍和数学推导,借助Matlab系统仿真工具进行仿真优化,得出模糊自适应PID参数的模糊推理规则和控制器算法结构,仿真结果表明系统的动态性能得到了提高。

The voltage type inverter is widely used in various fields and its high quality output wave requires high stead-state precision and fast dynamic response. Because the transfer function of inverter is not easy to get and voltage output often fluctuations, the conventional PID controller is difficult to meet these requirements. In order to get output waveform of better quality, the method that combined fuzzy adaptive and PID control was adopted to control it in real time. The fuzzy adaptive PID algorithm and the mathematical deduction were introduced, and then Matlab was used to simulate and optimize it. The fuzzy reasoning rules of the fuzzy adaptive PID parameters and the structure of controller algorithm was drawn. The simulation results show that the dynamic function of the system is improved.