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Recent developments on applications of sequential loop closing and diagonal dominance control schemes to industrial multivariable system

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Journal of Central South University 2013年第12期20卷 3401-3420页

作者： A.H.Mazinan M.F.Kazemi Department of Electrical Engineering Islamic Azad University (IAU) South Tehran Branch Department of Electrical Engineering Islamic Azad University (IAU) Lahijan Branch

With a focus on an industrial multivariable system, two subsystems including the flow and the level outputs are analysed and controlled, which have applicability in both real and academic environments. In such a case, at first, each subsystem is distinctively represented by its model, since the outcomes point out that the chosen models have the same behavior as corresponding ones. Then, the industrial multivariable system and its presentation are achieved in line with the integration of these subsystems, since the interaction between them can not actually be ignored. To analyze the interaction presented, the Gershgorin bands need to be acquired, where the results are used to modify the system parameters to appropriate values. Subsequently, in the view of modeling results, the control concept in two different techniques including sequential loop closing control(SLCC) scheme and diagonal dominance control(DDC) schemes is proposed to implement on the system through the profibus network, as long as the OPC(OLE for process control) server is utilized to communicate between the control schemes presented and the multivariable system. The real test scenarios are carried out and the corresponding outcomes in their present forms are acquired. In the same way, the proposed control schemes results are compared with each other, where the real consequences verify the validity of them in the field of the presented industrial multivariable system control.

关键词： multivariable system diagonal dominance control sequential loop closing control profibus network OPC server orifice relation interaction analysis Gershogerin bands non-minimum phase system

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