摘要
针对焦炉集气过程的多变量、强耦合和扰动剧烈特性,以及难以获得精确数学模型的问题,提出了基于改进闭环子空间辨识的焦炉集气管压力预测方法。分析系统输入输出变量,采用具有一定宽度的脉冲信号模拟装煤信号并作为系统的可测扰动输入。针对子空间新息估计辨识方法 PARIM-E在求解状态空间模型矩阵时运算复杂的问题,结合开环子空间数值计算辨识方法 N4SID,提出一种改进的闭环子空间辨识方法。对焦炉集气过程的闭环数据集应用改进后的子空间辨识方法,与原方法以及其他子空间辨识方法相比较,在保证闭环数据集辨识精度的同时,缩短了运算时间。
Aiming at the characteristics of multi-variable,strong coupling and violent disturbance in coke oven gas collecting process and the problem of difficult obtaining precise mathematical model of coke oven gas collecting system,in this paper a pressure prediction method for coke oven gas collector is proposed based on improved closed-loop subspace identification.The system input and output variables are analyzed; and the pulse signal with a certain width is adopted to simulate the coal charging signal and used as the measurable input disturbance of the system.Aiming at the complicated calculation problem of the closed-loop subspace identification method parsimonious subspace identification method through innovation estimation （PARIM-E） in solving state space model matrix,combining with open-loop subspace identification method numerical algorithm for subspace state space system identification （N4SID）,an improved closed-loop subspace identification method is presented.The improved subspace identification method,which uses succinct calculation to realize closed-loop subspace identification and has the advantages of original method,is applied on the closed-loop dataset of the coke oven gas collecting process; and compared with original method and other subspace identification methods,the proposed method shortens the calculation time while guaranteeing the identification precision of closed-loop dataset of coke oven gas collecting system.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2014年第5期1079-1085,共7页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金(61034005)资助项目
关键词
子空间辨识
闭环系统
焦炉集气过程
PARIM-E
N4SID
subspace identification
closed-loop system
coke oven gas collection progress
parsimonious subspace identification method through innovation estimation（PARIM-E）
numerical algorithm for subspace state space system identification（N4SID）
