Suboptimal Control of Singularly Perturbed Systems and Periodic Optimization

Vladimir Gaitsgory*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)


A traditional approach to singularly perturbed optimal control problems is based on an approximation of these problems by some reduced problems which are obtained via the formal replacement of the fast variables by the states of equilibrium of the “fast subsystems” considered with “frozen” slow variables and controls. We show that such approximation may be not valid and that it is valid if and only if certain families of periodic optimization problems admit steady state solutions. We show also how the solutions of these problems can be used to construct suboptimal controls for singularly perturbed problems when the approximation by the reduced problems is not possible.

Original languageEnglish
Pages (from-to)888-903
Number of pages16
JournalIEEE Transactions on Automatic Control
Issue number6
Publication statusPublished - 1993
Externally publishedYes

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