Limits of disturbance rejection using indirect control.

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Limits of disturbance rejection using indirect control.

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Title: Limits of disturbance rejection using indirect control.
Author: Kariwala, Vinay.; Skogestad, Sigurd.
Copyright year: 2005
Abstract: In many practical problems, the primary controlled variable is not available for feedback and is needed to be controlled indirectly using secondary measurements. We derive bounds on the H-2 H-inf optimal achievable performance for systems under indirect control, which have all scalar signals. These bounds are useful for gaining insights into the factors posing limitations on the achievable performance. As compared to direct control, the unstable poles can severely limit the control quality for indirect control. The limiting effect of the unstable poles can be reduced using an additional feedforward controller, when the disturbance is measurable.
Subject: DRNTU::Engineering::Chemical engineering.DRNTU::Engineering::Electrical and electronic engineering::Control and instrumentation::Control engineering.
Type: Conference Paper
Conference name: IEEE Conference on Decision and Control and European Control Conference (44th : 2005 : Seville, Spain)
School: School of Chemical and Biomedical Engineering
Version: Published version

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