模糊自适应免疫非线性PID控制及其在过热蒸汽温度控制中的应用

FUZZY ADAPTIVE IMMUNE NONLINEAR PID CONTROL AND ITS APPLICATION TO SUPERHEATED STEAM TEMPERATURE CONTROL

介绍了免疫非线性P和模糊自整定积分微分2种控制方法。结合常规PID、模糊控制和免疫反馈控制的优点,提出了一种新型的模糊自适应免疫非线性PID控制算法,以克服常规的PID控制难以协调系统快速性和稳定性之间的矛盾,以及单纯模糊控制自适应能力不理想且易产生振荡的局限,设计了模糊自适应免疫非线性PID控制器,将其应用于具有非线性、时变、纯滞后、不确定等特性的锅炉过热蒸汽温度控制。仿真结果表明,与常规PID控制器相比较模糊自适应免疫非线性PID控制器具有良好的动静态性能,较快的适应性,较强的抗干扰性和鲁棒性,以及具有更好的动态跟踪性能,超调量较小,调节时间短,稳态后无振荡等优点。

Two kinds of control method,namely immune nonlinearity P and fuzzy self-adjusted integration differentiation ID,have been presented.Combined with advantages of conventional PID controller with that of fuzzy controller and immune feedback control,a new control algorithm called fuzzy adaptive immune nonlinear PID controller has been put forward,so as to overcome the contradiction between rapidity and stability of the system,which is difficult to coordinate using the conventional PID controller,as well as the limitation due to adaptive ability of pure fuzzy control isn＇t ideal,and being easily to generate oscilation;a fuzzy adaptive immune nonlinear PID controller has been designed,and being used to superheated steam control with features of nonlinearity,time-changing,pure time delay,and uncertainty etc..Results of emulation show that the fuzzy adaptive immune nonlinear PID controller has good dynamic and static performance,faster adaptive behavior,stronger counter-inteference ability and robustness,as compared with the conventional PID controller,and having advantages of betterdynamic tracking performance,smaller over-adjustment,shorter adjusting time,and without oscilation after steady state.