大纯滞后对象多变量系统的改进ERGA配对方法  

ERGA pairing criterion for multivariable processes with large time delay

作　　者：张雨飞[1,2] 陈霈[1,2] 苏志刚[1,2] 贺华杰[1,2] 吕剑虹[1,2] 

机构地区：[1]东南大学能源热转换及其过程测控教育部重点实验室,南京210096 [2]东南大学能源与环境学院,南京210096

出　　处：《东南大学学报（自然科学版）》2012年第5期880-885,共6页Journal of Southeast University：Natural Science Edition

摘　　要：针对效能相对增益矩阵(ERGA)在大纯滞后对象变量配对中存在的问题,提出利用纯滞后时间τ和时间常数Tc的相对大小来形成纯滞后矩阵,并对带宽矩阵进行加权修正,得到改进的ERGA配对方法.通过工程实例对ERGA和改进ERGA配对方法进行了仿真对比,结果证明,在含有大纯滞后对象的系统中,由于改进的ERGA配对方法采用纯滞后矩阵对带宽矩阵进行了修正,减小了含大纯滞后对象配对的可能性,因此能更全面地反映对象动态特性,得到更加合理的配对结果.改进ERGA配对方法能全面反映对象的动态特性,因此在大纯滞后对象的MIMO系统变量配对中有着广阔的应用前景.In order to solve the problems while using the effective relative gain array （ERGA） to pair variables in the systems with large time delay, using the relative size of the time-delay t- and the time constant Tc to form the time delay matrix, and making weighted modification to the bandwidth matrix, an improved ERGA pairing criterion is given. Some engineering examples were used to compare ERGA with improved ERGA criterion. The simulation shows that in systems with large time delay, since the improved ERGA pairing takes the pure delay matrix to modify the bandwidth matrix, the possibility of pairing with large delay is reduced, and therefore the dynamic characteris- tics of the objects can be fully reflected and the matching results are more reasonable. The improved ERGA pairing criterion has broad application prospects in variable pairing for multi-input multi-out- put （MIMO） system with large time delay.

关 键 词：改进ERGA 变量配对 关联性评价 大纯滞后 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]