Continuous I/O robust control of SISO time-varying systems

    Authors

    Z. H. Qu; E. W. Kamen;J. F. Dorsey

    Comments

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    Abbreviated Journal Title

    Automatica

    Keywords

    continuous control; output feedback; robust control; robust stability; time-varying systems; SISO; nonlinear systems; model reference control; uncertain dynamic systems; nonlinear control; UNCERTAIN DYNAMIC-SYSTEMS; NONLINEAR-SYSTEMS; OUTPUT-FEEDBACK; MATCHING; CONDITIONS; ADAPTIVE-CONTROL; PLANTS; STABILIZATION; DESIGN; Automation & Control Systems; Engineering, Electrical & Electronic

    Abstract

    In this paper output tracking problem of time-varying systems is investigated. A system under consideration contains time-varying parameters which may change very fast and may be subjected to high-order nonlinear disturbances. A robust controller requiring only input-output measurement is proposed. The control guarantees at least stability of uniform ultimate boundedness which can be made arbitrarily close to asymptotic stability through choosing a design constant. The resulting control is continuous, uniformly bounded, and designed by a recursive mapping procedure. The only information of unknown systems required by the robust control approach are the bounding function on the magnitude of nonlinear disturbances and the bounds on the parameters and their derivatives; which represent the distinct feature of the proposed result. That is, time-varying parameters are not restricted to be either slow time-varying or of known structure. (C) 1997 Elsevier Science Ltd.

    Journal Title

    Automatica

    Volume

    33

    Issue/Number

    4

    Publication Date

    1-1-1997

    Document Type

    Article

    Language

    English

    First Page

    533

    Last Page

    550

    WOS Identifier

    WOS:A1997WZ21400003

    ISSN

    0005-1098

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