Technical Communique: Control reconfigurability of linear time-invariant systems

Authors:
N.Eva Wu;Kemin Zhou;Gregory Salomon
Affiliations:
Department of Electrical Engineering, Binghamton University, Binghamton, NY 13902, USA;Department of ECE, Louisiana State University, Baton Rouge, LA 70803, USA;Department of ECE, Louisiana State University, Baton Rouge, LA 70803, USA
Venue:
Automatica (Journal of IFAC)
Year:
2000

Citing 2
Cited 3

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Abstract

For any fault-tolerant control method to take effect, sufficient redundancy must exist in the plant (process) to be controlled. This paper is intended to establish a means of measuring the level of redundancy in connection with feedback control by borrowing the notion of the second-order modes. In particular, it is assumed that foreseeable faults of a process are parameterized in the model of the process. The smallest second-order mode is used as a measure of the potentiality of the process to maintain a certain performance through control reconfiguration at the occurrence of the worst faults over a prescribed set in the fault parameter space. This measure is called by the authors a control reconfigurability. The control reconfigurability is calculated for two process models to show its relevance to redundant actuating capabilities in the models.