Industrial & Engineering Chemistry Research
33 (9), pp 2134 - 2139

Abstract

The widely used pairing criteria involving the Niederlinski index and the steady-state relative gain array (RGA) used for evaluating integrity under decentralized control are extended to open-loop unstable plants it will in some cases be preferable to choose pairings giving negative Niederlinski index and/or RGA. The relationship between the two measures is also clarified.