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Sensitivity of large-scale control systems

✍ Scribed by M.E. Sezer; D.D. Šiljak

Publisher
Elsevier Science
Year
1981
Tongue
English
Weight
1013 KB
Volume
312
Category
Article
ISSN
0016-0032

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✦ Synopsis

The purpose of this paper is to consider sensitivity of suboptimal decentralized control schemes for large-scale systems composed of interconnected subsystems. It is shown that sensitivity of suboptimal systems with respect to distortions in the local control laws can be expressed in terms of the classical notions of the gain and phase margin measured directly by the degree of suboptimality of the decentralized control. This establishes the degree of suboptimality as an index of both the system performance regarding the optimality criterion and the robustness to uncertainties in the interconnections among the subsystems as well as distortions of the individual control laws, thus raising further the confidence in suboptimal designs of large-scale systems.

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