光源工程直线加速器工艺冷却水系统建模  

Modeling Electron Linacs Plant of Cooling Water System in Synchrotron Radiation Facility

作　　者：吕继兵[1] 赵哲身[1] 吴立[2] 李文静[2] 陆佼[2] 

机构地区：[1]上海大学机电工程与自动化学院,上海200072 [2]中国科学院上海应用物理研究所,上海201800

出　　处：《上海大学学报（自然科学版）》2010年第2期141-146,共6页Journal of Shanghai University:Natural Science Edition

摘　　要：以上海光源工程工艺冷却水-电子直线加速器系统为研究对象,采用闭环辨识方法进行建模.在闭环条件下,由于不可测噪声通过反馈环节对系统控制输入信号产生影响,采用二阶段辨识方法对系统进行建模.二阶段闭环辨识算法将闭环辨识问题转换为2个开环辨识问题,通过构造无噪声无污染的中间信号来代替实际的控制输入,以此解除噪声与控制输入之间的相关性,然后利用经典的开环辨识算法可得系统参数的一致无偏估计.By using a closed loop identification method, we build a mathematical model of the electron linacs plant of cooling water system in Shanghai Synchrotron Radiation Facility. Due to the impact of noise, which cannot be unmeasured, on the control input data through a two-stage closed feedback loop, identification is used to avoid bias of the obtained model. The algorithm transforms a closed loop identification problem to two open loop problems by constructing an intermediate signal without noise and pollution to replace the actual input, leading to de-correlation between input and noise. Using an existing open identification method, we obtain a consistent estimate of the system.

关 键 词：二阶段辨识 直接辨识 不可测噪声 

分 类 号：TP206[自动化与计算机技术—检测技术与自动化装置]