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Title: Limits of disturbance rejection using indirect control
Authors: Kariwala, Vinay
Skogestad, Sigurd
Keywords: DRNTU::Engineering::Chemical engineering
DRNTU::Engineering::Electrical and electronic engineering::Control and instrumentation::Control engineering
Issue Date: 2005
Source: Kariwala, V., & Skogestad, S. (2005). Limits of disturbance rejection using indirect control. Proceedings of the 44th IEEE Conference on Decision and Control, and the European Control Conference 2005, (pp. 3620-3625).
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.
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Appears in Collections:SCBE Conference Papers

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