On the dynamics and control of a class of continuous digesters

作     者：Schaum, Alexander Alvarez, Jesus Garcia-Sandoval, Juan P. Gonzalez-Alvarez, Victor M. 

作者机构：Univ Kiel Chair Automat Control Kiel Germany Univ Autonoma Metropolitana Iztapalapa Dept Ingn Proc & Hidraul Mexico City DF Mexico Univ Guadalajara CUCEI Dept Ingn Quim Guadalajara Jalisco Mexico 

出 版 物：《JOURNAL OF PROCESS CONTROL》 (工艺过程控制杂志)

年 卷 期：2015年第34卷

页      面：82-96页

核心收录：

学科分类：0711[理学-系统科学] 07[理学] 0817[工学-化学工程与技术] 08[工学] 070105[理学-运筹学与控制论] 081101[工学-控制理论与控制工程] 0811[工学-控制科学与工程] 0701[理学-数学] 071101[理学-系统理论] 

主　　题：Continuous anaerobic digestion Stoichiometric invariants Control input constraints PI control Robust nonlocal stability 

摘      要：The saturated OF control problem for a class of four-state anaerobic digesters with volatile fatty acids (VFAs) measurement is addressed. The reactor must operate about an optimal steady-state, with maximum VFA consumption that is locally open-loop stable but not necessarily structurally stable. The problem is addressed as an interlaced control-observer design in the light of passivity, observability, and bifurcation properties. The result is a saturated linear PI controller with: (i) systematic construction and tuning and (ii) nonlocal robust stability conditions in terms of control gains and limits. The proposed approach is illustrated with a representative case example through numerical simulations, including a comparison with the switching control approach. (C) 2015 Elsevier Ltd. All rights reserved.