scholarly journals Dynamic Relative Gain Array Estimation using Local Polynomial Approximation Approach

2016 ◽  
Vol 37 (4) ◽  
pp. 247-259 ◽  
Author(s):  
Ali M. H. Kadhim ◽  
Wolfgang Birk ◽  
Miguel Castano Arranz
Keyword(s):  
Polynomial Approximation ◽  
Relative Gain ◽  
Approximation Approach ◽  
Local Polynomial ◽  
Relative Gain Array

Analysis of Process Interactions in Dynamic System Using Frequency Dependent RGA

2011 ◽  
Vol 403-408 ◽  
pp. 895-899
Author(s):  
Amit Jain ◽  
B.V. Babu
Keyword(s):  
Transfer Function ◽  
Process Model ◽  
Transfer Function Model ◽  
Control Loop ◽  
Frequency Range ◽  
Function Model ◽  
Frequency Dependent ◽  
Relative Gain ◽  
Relative Gain Array ◽  
Correct Pairing

A frequency dependent approach to defining a dynamic relative gain array (DRGA) is discussed. The approach assumes the availability of a dynamic transfer function based process model for control loop pairing analysis. Two examples are considered: one in which the traditional RGA (based on steady-state gain matrix) gives the correct pairing recommendation and the other in which the traditional RGA suggests wrong pairings particularly in the frequency range of interest. The calculations pertaining to analysis of control loop pairing is performed using MATLAB (version 7.0.1). An inaccurate indication of the amount of interaction present is discussed. The first example uses 2x2 transfer function model [1] and the second one uses 3x3 transfer function model [2].

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