State-space solutions to the h_inf/ltr design problem

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    Abstract

    The LTR design problem using an JC optimality criterion is presented for two types of recovery errors, the sensitivity recovery error and the input-output recovery error. For both errors two different approaches are presented. First, following the classical LTR design philosophy, a Luenberger observer
    based approach is proposed, where the Z part of the controller is appended to a standard full-order observer. Second, allowing for general controllers, an JC state-space problem is formulated directly from the recovery errors. Both approaches lead to controller orders of at most 2n. In the minimum phase case,
    though, the order of the controllers can be reduced to n in all cases. The control problems corresponding to the various controller types are given as four different singular state-space problems, and the solutions are given in terms of the relevant equations and inequalities
    Original languageEnglish
    JournalInternational Journal of Robust and Nonlinear Control
    Volume3
    Issue number1
    Pages (from-to)1-45
    ISSN1049-8923
    DOIs
    Publication statusPublished - 1993

    Keywords

    • Loop transfer recovery
    • Singular 25% theory
    • Luenberger observer
    • Youla parameterization

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