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Centralized PI control for high dimensional multivariable systems based on equivalent transfer function
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DOI：10.1016/j.isatra.2014.05.016.png)
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Abstract
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This article presents a new scheme to design full matrix controller for high dimensional multivariable processes based on equivalent transfer function (ETF). Differing from existing ETF method, the proposed ETF is derived directly by exploiting the relationship between the equivalent closed-loop transfer function and the inverse of open-loop transfer function. Based on the obtained ETF, the full matrix controller is designed utilizing the existing PI tuning rules. The new proposed ETF model can more accurately represent the original processes. Furthermore, the full matrix centralized controller design method proposed in this paper is applicable to high dimensional multivariable systems with satisfactory performance. Comparison with other multivariable controllers shows that the designed ETF based controller is superior with respect to design-complexity and obtained performance. (C) 2014 ISA. Published by Elsevier Ltd. All rights reserved.
Keywords:
Multivariable systems
Equivalent transfer function
Centralized control
PI controller
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