RNGA based control system configuration for multivariable processes

This paper presents a new control-loop configuration criterion for multivariable processes. Both the steady-state and transient information of the process transfer function are investigated. A new interaction measurement, relative normalized gain array, is proposed for evaluating control-loop intera...

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Bibliographic Details
Published in:Journal of process control 2009-06, Vol.19 (6), p.1036-1042
Main Authors: He, Mao-Jun, Cai, Wen-Jian, Ni, Wei, Xie, Li-Hua
Format: Article
Language:English
Subjects:
Controller independent
Decentralized control
Interaction measurement
Loop pairing
Multivariable processes
Niederlinski index
Relative gain array
Relative normalized gain array
Simulation
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Summary:This paper presents a new control-loop configuration criterion for multivariable processes. Both the steady-state and transient information of the process transfer function are investigated. A new interaction measurement, relative normalized gain array, is proposed for evaluating control-loop interactions. Consequently, a new loop pairing criterion based on the relative normalized gain array is proposed for control structure configuration. The main contribution of this work is that it systematically analyzed the process transferring characteristics from both steady-state and transient perspectives and derived a feasible solution for the problem. Several examples, for which the conventional relative gain array based loop pairing criterion gives an inaccurate interaction assessment, are employed to demonstrate the effectiveness of the proposed interaction measure and loop pairing criterion.
ISSN:0959-1524
1873-2771
DOI:10.1016/j.jprocont.2009.01.004