Yazar "Kaya I." seçeneğine göre listele

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    Exact parameter estimation using relay feedback control
    (IFAC Secretariat, 2005) Kaya I.; Atherton D.P.
    Obtaining the parameters for PID controllers based on limit cycle information from the process in a relay controlled feedback loop is, in many cases, an acceptable practical procedure. If the form of the plant transfer function is known, exact expressions for the limit cycle frequency and amplitude can be derived in terms of the plant parameters, so that their measurements, assumed error free, can be used to calculate two unknown plant parameter values. in the literature to date the solutions have been considered for stable or unstable first order plus dead time (FOPDT) or second order plus dead time (SOPDT) plant transfer functions. This paper reports on exact parameter estimation for an SOPDT plant transfer function with the further addition of a , stable or unstable, zero by a single relay feedback test. Copyright © 2005 IFAC.
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    A graphical method for computation of all stabilizing PI controllers
    (IFAC Secretariat, 2005) Tan N.; Kaya I.; Atherton D.P.
    in this paper, a new method for the calculation of all stabilizing PI controllers is given. The proposed method is based on plotting the stability boundary locus in the ( kp , ki )-plane and then computing the stabilizing values of the parameters of a PI controller. The technique presented does not require sweeping over the parameters and also does not need linear programming to solve a set of inequalities. Thus it offers several important advantages over existing results obtained in this direction. Computation of stabilizing PI controllers which achieve user specified gain and phase margins is also studied. Furthermore, the proposed method is used to compute all the parameters of a PI controller which stabilize a control system with an interval plant family. Examples are given to show the benefits of the method presented. Copyright copy; 2005 IFAC. Copyright © 2005 IFAC.
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    Smith predictor design by CDM
    (Institute of Electrical and Electronics Engineers Inc., 2001) Hamamci S.E.; Kaya I.; Atherton D.P.
    Good control of processes with a long dead time is often achieved using a Smith predictor structure. Typically a PI or PID controller is used in this configuration. In this paper, controller design is considered for a recently proposed modified form of the Smith predictor. The design is done using the Coefficient Diagram Method (CDM) to achieve a good step response to a set point change. The proposed method is compared with some other existing methods to illustrate its value. © 2001 EUCA.