Smith预估控制系统抗扰性能的改善  

Improvement of anti-disturbance performance for Smith predictor

作　　者：姜克君[1] 戴丽红[1] 郝睿[2] 于颖[2] 

机构地区：[1]辽宁科技大学电子与信息工程学院,辽宁鞍山114051 [2]鞍山供电公司,辽宁鞍山114001

出　　处：《辽宁科技大学学报》2011年第5期479-485,489,共8页Journal of University of Science and Technology Liaoning

摘　　要：针时常规Smith预估控制系统扰动回调慢的弱点,从控制结构上进行改进,介绍接受扰动量输入的Smith预估控制A系统和加入微分反馈的Smith预估控制B系统。其中,后者符合二自由度控制思想。对二者从理论和工程实现两方面进行分析测试,与常规Smith预估控制系统进行曲线数据对比,给出二者动态性能的具体差别:A系统在扰动和控制通道模型一致的情况下,与常规Smith预估控制系统相比扰动回调时间和动态误差分别减小近70%和85%,B系统分别减小约50%和20%。According to the slow disturbance-turning-back of regular Smith predictor, the control structure is improved, and the modified scheme A and the modified scheme B with a derivative feedback are introduced, where scheme B accords with 2 DOF control concept. The scheme A and B are analyzed in both aspects of theory and engineering implementation, and the curve data is compared with the regular Smith predictor, the differences of dynamic performance for both are given： disturbance-turning back time and dynamic error of scheme A respectively decrease about 70% and 85% compared with regular Smith system in the condition of disturbance channel model being the same as control channel, scheme B respectively about 50% and 20%.

关 键 词：Smith预估控制系统 抗扰性能 扰动回调 扰动抑制 时滞对象 

分 类 号：TP273.3[自动化与计算机技术—检测技术与自动化装置]