模糊PID参数自整定在炉温控制系统中的应用

炉温控制系统是一个复杂系统,针对一次性整定的PID参数难以保证系统控制效果始终处于优化状态,提出采用参数自整定方法,实时改变PID参数,以保证控制系统的优良品质.借助PID参数的在线模糊自整定后,自动切换到正常工作状态,在系统性能发生改变时自动启动PID参数的整定过程,重新整定的PID参数可以使系统达到更好的控制品质.

Application of Fuzzy-PID Parameter Self-Tuning Technique for Temperature Control System of Heating Furnace

The temperature control system of heating furnace is a complex system.Aiming at the optimizing problem by once set- ting parameters of PID is difficult always to ensure excellent con- trol effect.The paper proposed to adopt parameter self-tuning technique that could adjust the PID parameters on real time to ensure good quality of control system.It combined fuzzy logic control with classical PID control technique,by dint of fuzzy self-tuning of PID parameter on line,after parameters adjusted the system switches to natural work state.When the changing of system performance was happened and went beyond the specified range,the system would automatically start tuning proeess of PID.The PID parameters after retuned could get better control effect than before.Therefore it is enhanced to system perform- ance,higher in control accuracy,better in system stability,and stronger in robustness.