Minimization of Wet End disturbances during web breaks using online LAV estimation

作     者：Nobakhti, Amin Wang, Hong 

作者机构：Sharif Univ Technol Tehran Iran Univ Manchester Control Syst Ctr Manchester M13 9PL Lancs England 

出 版 物：《CONTROL ENGINEERING PRACTICE》 (控制工程实践)

年 卷 期：2010年第18卷第4期

页      面：433-447页

核心收录：

学科分类：0711[理学-系统科学] 0808[工学-电气工程] 07[理学] 08[工学] 070105[理学-运筹学与控制论] 081101[工学-控制理论与控制工程] 0811[工学-控制科学与工程] 0701[理学-数学] 071101[理学-系统理论] 

基　　金：UK Leverhulme Trust [F/00 120/BC] China National Science Foundation [60534010, 60828007, 60974029] 973 National Basic Research Program of China [2009CB320601] 111 project [B08015] 

主　　题：Estimation algorithms Paper industry Linear estimation Genetic algorithms 

摘      要：During a Wet End break, the loss of paper feed through the paper machine causes loss of sensory information and the remaining parts of the process are operated in open-loop. This causes the stock composition in the Headbox to deviate substantially from the nominal specifications, causing paper quality (after start up) and paper machine runability issues. In this work, the Base Sheet Ash measurement of the scanner is estimated using a least absolute value (LAV) model which can then be used for control of the chalk valve during the breaks to keep the Headbox Ash within specified limits. The model is computed using a very fast optimization algorithm which is able to compute the LAV solution using only basic elementary operations. The proposed approach has been developed for a UK paper mill. (C) 2010 Elsevier Ltd. All rights reserved.