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mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Maximizing allowable disturbances in uncertain, non-minimum phase unstable systems
  name:
    name part: Sobhani, Massoud
    name part: 1958-
    role:
      role term: creator
  name:
    name part: Jayasuriya, Suhada
    role:
      role term: degree supervisor.
  name:
    name part: Alexander, R. M.
    role:
      role term: degree committee member.
  name:
    name part: Bhattacharyya, S. P.
    role:
      role term: degree committee member.
  name:
    name part: Rabins, M. J.
    role:
      role term: degree committee member.
  name:
    name part: Texas A & M University
    role:
      role term: degree granting institution.
  type of resource: text
  genre: bibliography
  genre: Academic theses
  origin info:
    place:
      place term: xx
    date issued: 1991
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xi, 146 leaves : illustrations ; 29 cm
  abstract: A frequency domain design methodology for maximizing the allowable size of step disturbances for a class of uncertain plants subjected to hard time domain constraints on the control, internal states and the output is extended to Non-Minimum Phase (NMP) and unstable systems. The design technique is based on mapping the time domain constraints into the frequency domain to obtain point-wise constraints on the magnitude and phase of the nominal loop transfer function at each frequency. Once these boundaries are obtained, classical loop shaping realizes an acceptable nominal loop transfer function. To extend the design methodology to NMP and/or unstable systems, the effects of right-half-plane zeros and poles of the system on its feedback properties are studied first. Then, the design methodology is modified to accommodate such systems. For NMP systems, an inner-outer factorization is used to transform the frequency domain design boundaries on the nominal NMP loop transfer function into equivalent bounds on the corresponding MP transfer function. For unstable systems similar difficulties are also noted which in most cases can be dealt with as for the NMP case. Alternatively, prestabilization can be used, which in fact becomes necessary when the system has imaginary-axis poles. Consequently, issues regarding the type of stabilization technique that should be used, the desirable locations for placing the closed loop poles, and the effect of prestabilization on the maximum tolerable size of the step disturbance are addressed. Furthermore, a necessary condition for the existence of a solution is given which is based on transforming the design boundaries on the loop transfer function into equivalent bounds on the sensitivity function. As an application, the problem of controlling the position of a ball rolling on a beam is treated. Finally, a loop shaping algorithm is included. The algorithm is based on converting the loop shaping problem into a parameter identification schem…
  note: Typescript (photocopy).
  note: Vita.
  note: "Major subject: Mechanical Engineering."
  note: Ph. D. Texas A & M University 1991
  note: Includes bibliographical references.
  subject:
    topic: Feedback control systems
  subject:
    topic: Control theory
  subject:
    topic: Robust statistics
  subject:
    topic: Major mechanical engineering
  identifier: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  record info:
    record content source: TXA
    record creation date: 930105
    record change date: 20200904152605.0
    record identifier: in00001113914
    language of cataloging:
      language term: eng