一种经过模糊改良的smith控制器  

Design of a Modified Fuzzy Smith Controller

作　　者：彭晓艳[1] 王广军[1] 何祖威[1] 

机构地区：[1]重庆大学动力工程学院,重庆400044

出　　处：《计算机仿真》2005年第6期124-125,182,共3页Computer Simulation

摘　　要：对传统基于精确对象模型的smith预估控制器进行改良。传统smith预估控制器在估计模型与实际对象有差异时,控制效果不尽人意。针对这一缺点,该文将这种差异视为增益的差异所引起,通过引入估计模型增益修正环节,利用模糊控制器,尽可能将差异消除。并对传统smith预估控制器的结构进行改进,去掉外反馈回路,增加稳定性;加入积分校正环节,达到减小稳态误差的目的,使改良后的smith控制器在一定的模型误差范围内得到较好的控制品质。经仿真研究证明了该方法的有效性。A modified Smith controller for delay process is proposed. This kind of controller tries to eliminate difference between the object and predicting model by thinking the difference is due to the gain difference and introducing a fuzzy controller. In the meantime, the structure of the traditional Smith controller is modified by removing outer feedback to increase the stability and adding an integrating correction element to reduce steady - state error. Simulation result shows that this kind of controller is valid to get satisfactory control quality.

关 键 词：史密斯预估 延迟系统 模糊控制 

分 类 号：TP18[自动化与计算机技术—控制理论与控制工程]