The problem of loss of co-primeness in recursively identified ARMA models is discussed, and its impact on a large class of multivariable pole-assignment controllers is elucidated. On this basis, an adaptive digital controller is proposed based on a multivariable PID controller incorporating an inner-loop linear quadratic compensator. This control-law circumvents the problems which can be experienced, due to loss of co-primeness of the identified ARMA model, using the adaptive PID controller incorporating inner-loop pole-assignment as proposed by B. Porter and C.L. Body (1989). The effectiveness of such an adaptive digital controller is illustrated by designing an adaptive set-point tracking controller for the F-16 aircraft in a flight condition for which this aircraft is open-loop unstable.


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    Title :

    Design of adaptive digital PID controllers incorporating linear quadratic compensators


    Additional title:

    Entwurf adaptiver digitaler PID-Regler unter Einschluß linearer quadratischen Kompensatoren


    Contributors:
    Boddy, C.L. (author) / Porter, B. (author)

    Published in:

    Publication date :

    1991


    Size :

    6 Seiten, 22 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English







    Classical Compensators via Linear Quadratic Design

    Mackison, D. / American Institute of Aeronautics and Astronautics / AAS | British Library Conference Proceedings | 2000