Discrete-time estimation and compensation are discussed as a solution to the problems encountered when disturbances are present and degrade the performance of continuous automatic control systems. The method described, under a mild set of conditions, allows the designer to locate the closed-loop system poles substantially anywhere and provide disturbance rejection as large as desired by increasing the dimensions of the disturbance estimator. This estimation/compensation scheme results in a gain characteristic, below some frequency ( omega /sub c/), with a slope of q*20 dB/decade. The value of q and omega /sub c/ can be chosen by the designer, within the physical limitations of the problem, so that the system error resulting from either deterministic or stochastic disturbances is sufficiently reduced. The method has been investigated for use with known linear, time-invariant systems.<>


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    Title :

    Disturbance estimation and compensation in linear systems


    Contributors:
    Profeta, J.A. (author) / Vogt, W.G. (author) / Mickle, M.H. (author)


    Publication date :

    1990-03-01


    Size :

    432397 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



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