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

作者：Baldea M^*; Daoutidis P

来源：International Journal of Robust and Nonlinear Control, 2014, 24(17): 2852-2866.

DOI：10.1002/rnc.3029

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

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.

• 出版日期2014-11-25