On the dynamic resiliency of constrained processes

Zafiriou, Evanghelos; Chiou, Hung-Wen

doi:10.1016/0098-1354(95)00038-0

Cited by 7 publications

(1 citation statement)

References 14 publications

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“…Performance limitations due to RHP zeros are extensively discussed by, e.g., Freudenberg and Looze (1985, SISO), Havre and Skogestad (1996, MIMO), Sidi (1997, SISO), Skogestad and Postlethwaite (1996, Chapters 5 (SISO) and 6 (MIMO)), and Zhou et al (1996, Chapter 6 (MIMO)). If magnitude bounds are imposed on u and y, Za"riou and Chiou (1996) show that RHP zeros of the individual elements of P(s) may be detrimental, in contrast to the case without these requirements. Goodwin and Seron (1995) initiate e!orts towards quantifying performance limitations due tò RHP zerosa in nonlinear systems.…”

Section: Right Half-plane Zerosmentioning

confidence: 99%

A review of methods for input/output selection

2001

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Control system design involves input/output (IO) selection, that is, decisions on the number, the place, and the type of actuators and sensors. The choice of inputs and outputs a!ects the performance, complexity, and costs of the control system. Due to the combinatorial nature of the selection problem, systematic methods are needed to complement one's intuition, experience, and physical insight. This paper reviews the currently known IO selection methods, which aids the control engineer in picking a suitable method for the problem at hand. The methods are grouped according to the control system property that is addressed and applications are grouped according to the considered control systems. A set of criteria is proposed that a good IO selection method should possess. It is used to assess and compare the methods and it could be used as a guideline for new methods. The state of the art in IO selection is sketched and directions for further research are mentioned.

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Section: Right Half-plane Zerosmentioning

confidence: 99%

A review of methods for input/output selection

2001

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An overview on controllability analysis of chemical processes

2011

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Controllability is one of the most important aspects of chemical process operability, because it can be used to assess the attainable operation of a given process and improve its dynamic performance. The purpose of this article is to outline the main methodologies that have been developed to deal with the assessment of process controllability and the improvement of its controllability characteristics. Several existing controllability assessment methods are reviewed and discussed. For improving the controllability characteristic of a process, there are two main design methods: the optimization-based method and the controllability indices-based anticipating sequential method. Advantages and disadvantages of these techniques are discussed. It has been emphasized that bifurcation analysis, as a powerful nonlinear analysis tool, could provide important guidance for making processes more controllable by eliminating or avoiding some undesirable behaviors of processes. Further challenges and developments in the field of process controllability are identified.

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