Nonconservative QFT bounds for tracking error specifications

  1. Elso, J. 1
  2. Gil-Martínez, M. 3
  3. Garcia-Sanz, M. 2
  1. 1 Universidad Pública de Navarra
    info

    Universidad Pública de Navarra

    Pamplona, España

    ROR https://ror.org/02z0cah89

  2. 2 Case Western Reserve University
    info

    Case Western Reserve University

    Cleveland, Estados Unidos

    ROR https://ror.org/051fd9666

  3. 3 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

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Revista:
International Journal of Robust and Nonlinear Control

ISSN: 1049-8923

Año de publicación: 2011

Volumen: 22

Número: 18

Páginas: 2014-2025

Tipo: Artículo

DOI: 10.1002/RNC.1804 SCOPUS: 2-s2.0-84870053456 WoS: WOS:000311405500002 GOOGLE SCHOLAR

Otras publicaciones en: International Journal of Robust and Nonlinear Control

Resumen

An alternative to the traditional QFT tracking problem, in which upper and lower tolerances are imposed on the magnitude of the tracking transfer function, is to define the robust specification as a boundary on the deviation of such function from a predefined model. However, previous research exploring this approach reveals a certain overdesign and dependence on the choice of the nominal plant. This paper establishes a necessary condition on the controller from tracking error specifications. With this condition, the controller bounds introduce no overdesign, and the resulting two-degrees-of-freedom design is independent of the choice of the nominal plant, similar to the traditional approach. Copyright © 2011 John Wiley & Sons, Ltd.