PID参数自整定模糊控制器的应用

Application of fuzzy logic controller with self-tuning PID parameters

针对电加热炉大惯性、纯滞后、参数时变的非线性对象的控制的特点,以及常规PID控制参数不易调节的特点,提出了一种PID参数自整定模糊控制方法,设计了PID参数自整定模糊控制器,并在炉温控制系统中应用。实验结果表明:PID参数自整定模糊控制消除了系统的稳态误差,没有超调和振荡,鲁棒性较强,而且简单易行,具有一定的实用价值。

In view of electrical heating furnace＇s non-linear control object characteristics of large inertia, pure time-delay and parameters time-variation and the hard-to-tune characteristic of conventional PID control parameter, a new method for fuzzy control with self-tuning PID parameters was put forward. A fuzzy controller with self-tuning PID parameters was designed and applied in the furnace＇s temperature control system. The result shows that fuzzy control with self-tuning PID parameters eliminates the system＇s steady state error, has neither overshoot nor oscillation but great robustness, and is easily handled; therefore it is of some practical value.