In this article an approach based on fractional calculus to control a second order linear process with pure integration at the output is presented. The main contribution of this work is the control strategy, which is a variant of the double loop controller where the proportional outer loop controller is replaced by a fractional derivative one, in order to increase the robustness of the controlled system. A digitalization of the non-integer derivative is performed by a continued fraction expansion and Euler conversion method. Simulation results are shown for a reference tracking and disturbance rejection. In addition, it is compared with a conventional state feedback controller in the presence of uncertainty in the process. Thus, a reasonable response rate is accomplished with no overshoot neither system steady -- state error. These features were kept quite unchanged under a relative uncertainty degree of plus-minus 50% in the plant parameters.


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    Title :

    Robust Fractional Digital Control of a First Order Plus Integrator Process




    Publication date :

    2012-11-01


    Size :

    476606 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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