A significant number of control loops in process plants perform poorly due to control valve stict... more A significant number of control loops in process plants perform poorly due to control valve stiction. Developing a method to detect valve stiction in the early phase is imperative to avoid major disruptions to the plant operations. Nonlinear principal component analysis (NLPCA), widely known for its capability in unravelling nonlinear correlations in process data, is extended in this paper to
... The overall heat transfer capacities (UAs) and k-values are estimated from the steady-state s... more ... The overall heat transfer capacities (UAs) and k-values are estimated from the steady-state solution and specified in each layer. ... For pumps, only the power and static head are required. ... Analyzing the value of first-principles dynamic simulation. Hydrocarbon Processing. ...
2007 International Conference on Intelligent and Advanced Systems, 2007
... Lemma D. Tufa1, M. Ramasamy1*, M. Shuhaimi1, Sachin C. Patwardhan2 1 Chemical Engineering Dep... more ... Lemma D. Tufa1, M. Ramasamy1*, M. Shuhaimi1, Sachin C. Patwardhan2 1 Chemical Engineering Department, Universiti Teknologi PETRONAS, 31750, Tronoh, Perak, Malaysia 2 Department of Chemical Engineering, Indian Institute of Technology, Bombay, Powai ... u mu mu ...
ABSTRACT Successful deployment of cooperative decentralized model predicative control needs reaso... more ABSTRACT Successful deployment of cooperative decentralized model predicative control needs reasonably accurate subsystem interactions models. Processes in which open-loop tests are not permitted, closed-loop identification of subsystems interactions is crucial. An approach that combines the direct and indirect methods of closed-loop identification is proposed in this paper. It is shown that full dynamics of MIMO systems can be determined following a two-steps identification procedure. A representative case study is used to demonstrate the efficacy of the proposed approach.
A significant number of control loops in process plants perform poorly due to control valve stict... more A significant number of control loops in process plants perform poorly due to control valve stiction. Developing a method to detect valve stiction in the early phase is imperative to avoid major disruptions to the plant operations. Nonlinear principal component analysis (NLPCA), widely known for its capability in unravelling nonlinear correlations in process data, is extended in this paper to
... The overall heat transfer capacities (UAs) and k-values are estimated from the steady-state s... more ... The overall heat transfer capacities (UAs) and k-values are estimated from the steady-state solution and specified in each layer. ... For pumps, only the power and static head are required. ... Analyzing the value of first-principles dynamic simulation. Hydrocarbon Processing. ...
2007 International Conference on Intelligent and Advanced Systems, 2007
... Lemma D. Tufa1, M. Ramasamy1*, M. Shuhaimi1, Sachin C. Patwardhan2 1 Chemical Engineering Dep... more ... Lemma D. Tufa1, M. Ramasamy1*, M. Shuhaimi1, Sachin C. Patwardhan2 1 Chemical Engineering Department, Universiti Teknologi PETRONAS, 31750, Tronoh, Perak, Malaysia 2 Department of Chemical Engineering, Indian Institute of Technology, Bombay, Powai ... u mu mu ...
ABSTRACT Successful deployment of cooperative decentralized model predicative control needs reaso... more ABSTRACT Successful deployment of cooperative decentralized model predicative control needs reasonably accurate subsystem interactions models. Processes in which open-loop tests are not permitted, closed-loop identification of subsystems interactions is crucial. An approach that combines the direct and indirect methods of closed-loop identification is proposed in this paper. It is shown that full dynamics of MIMO systems can be determined following a two-steps identification procedure. A representative case study is used to demonstrate the efficacy of the proposed approach.
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