A general analysis and control framework for process systems with inventory recycling

M. Baldea, P. Daoutidis

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

In this work, we generalize our previous results concerning the impact of material recycling and energy recovery on plant dynamics and control. We define a generic class of integrated process systems, in which an extensive quantity that obeys conservation laws is recovered from the process output and recycled to the process feed; the operation of the system is assumed to be subject to time-varying, measurable disturbances. We establish, in this general case, that integration is conducive to the emergence of a two-time-scale dynamic behavior and derive reduced-order models for the dynamics in each time scale. Subsequently, we postulate a hierarchical control framework that exploits these dynamics results in the design of coordinated fast and slow feedback/feedforward controllers and formulate a stability result for the closed-loop system. We demonstrate these concepts on a case study concerning an energy-integrated process.

Original languageEnglish (US)
Pages (from-to)2852-2866
Number of pages15
JournalInternational Journal of Robust and Nonlinear Control
Volume24
Issue number17
DOIs
StatePublished - Nov 25 2014

Keywords

  • model reduction
  • nonlinear control
  • process control
  • singular perturbations

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