Control of delayed recycling systems with unstable first order forward loop

被引:11
作者
Marquez-Rubio, J. F. [1 ]
del Muro-Cuellar, B. [1 ]
Velasco-Villa, M. [2 ]
Cortes-Rodriguez, D. [1 ]
Sename, O. [3 ]
机构
[1] Inst Politecn Nacl, ESIME Unidad Culhuacan, Coyoacan 04430, DF, Mexico
[2] CINVESTAV IPN, Dept Ingn Elect, Secc Mecatron, Mexico City 07300, DF, Mexico
[3] ENSE3, Dept Automat Control, CIPSA Lab, F-38402 St Martin Dheres, France
关键词
Time-delay; Recycling system; Stabilization; Observer; SMITH PREDICTOR; TIME;
D O I
10.1016/j.jprocont.2012.02.002
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
Unstable time-delay systems and recycling systems are challenging problems for control analysis and design. When an unstable time-delay system has a recycle, its control problem becomes even more difficult. A control methodology for this class of systems is proposed in this paper. The considered strategy is based on the fact that if some internal system signals are available for measurement, then it will be possible to decouple the backward dynamics of the system and then a feedback controller could be designed for the forward dynamics. The key point for this strategy to be carried out is an asymptotic observer-predictor proposed to estimate these required internal signals. Necessary and sufficient conditions to assure convergence of this observer are given. After proving that the proposed control scheme tracks a step input signal and at the same time reject step disturbances, a procedure summarizing the methodology is provided. Robustness with respect to delay uncertainty and model parameters are also analyzed. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:729 / 737
页数:9
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