Robust estimation of base sheet ash during a wet end break, scanner warm up and initialization

Amin Nobakhti; Hong Wang

doi:10.1109/ACC.2009.5160227

Robust estimation of base sheet ash during a wet end break, scanner warm up and initialization

Amin Nobakhti, Hong Wang

Research output: Chapter in Book/Conference proceeding › Conference contribution › peer-review

Abstract

During a Wet End break, the loss of paper feed through the paper machine causes the two main scanners to go offline 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 developed around key Wet End variables which have been identified using PCA and sensitivity analysis. Modeling is performed on plantwide data obtained from actual running of a paper machine in the UK. © 2009 AACC.

Original language	English
Title of host publication	Proceedings of the American Control Conference\|Proc Am Control Conf
Pages	2210-2215
Number of pages	5
DOIs	https://doi.org/10.1109/ACC.2009.5160227
Publication status	Published - 2009
Event	2009 American Control Conference, ACC 2009 - St. Louis, MO Duration: 1 Jul 2009 → …

Conference

Conference	2009 American Control Conference, ACC 2009
City	St. Louis, MO
Period	1/07/09 → …

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10.1109/ACC.2009.5160227

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@inproceedings{5050cc87b20a47dc9e6cbb302bee20a3,

title = "Robust estimation of base sheet ash during a wet end break, scanner warm up and initialization",

abstract = "During a Wet End break, the loss of paper feed through the paper machine causes the two main scanners to go offline 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 developed around key Wet End variables which have been identified using PCA and sensitivity analysis. Modeling is performed on plantwide data obtained from actual running of a paper machine in the UK. {\textcopyright} 2009 AACC.",

author = "Amin Nobakhti and Hong Wang",

year = "2009",

doi = "10.1109/ACC.2009.5160227",

language = "English",

isbn = "9781424445240",

pages = "2210--2215",

booktitle = "Proceedings of the American Control Conference|Proc Am Control Conf",

note = "2009 American Control Conference, ACC 2009 ; Conference date: 01-07-2009",

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TY - GEN

T1 - Robust estimation of base sheet ash during a wet end break, scanner warm up and initialization

AU - Nobakhti, Amin

AU - Wang, Hong

PY - 2009

Y1 - 2009

N2 - During a Wet End break, the loss of paper feed through the paper machine causes the two main scanners to go offline 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 developed around key Wet End variables which have been identified using PCA and sensitivity analysis. Modeling is performed on plantwide data obtained from actual running of a paper machine in the UK. © 2009 AACC.

AB - During a Wet End break, the loss of paper feed through the paper machine causes the two main scanners to go offline 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 developed around key Wet End variables which have been identified using PCA and sensitivity analysis. Modeling is performed on plantwide data obtained from actual running of a paper machine in the UK. © 2009 AACC.

U2 - 10.1109/ACC.2009.5160227

DO - 10.1109/ACC.2009.5160227

M3 - Conference contribution

SN - 9781424445240

SP - 2210

EP - 2215

BT - Proceedings of the American Control Conference|Proc Am Control Conf

T2 - 2009 American Control Conference, ACC 2009

Y2 - 1 July 2009

ER -

Robust estimation of base sheet ash during a wet end break, scanner warm up and initialization

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