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Author: search.filters.author.Tipsuwanporn, V.Subject: search.filters.subject.CDM

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    Smith predictor design by CDM for temperature control system
    (2009-11-01)
    Roengruen, P.
    ;
    Tipsuwanporn, V.
    ;
    Puawade, P.
    ;
    Numsomran, A.
    Smith Predictor control is theoretically a good solution to the problem of controlling the time delay systems. However, it seldom gets use because it is almost impossible to find out a precise mathematical model of the practical system and very sensitive to uncertain system with variable time-delay. In this paper is concerned with a design method of smith predictor for temperature control system by Coefficient Diagram Method (CDM). The simulation results show that the control system with smith predictor design by CDM is stable and robust whilst giving the desired time domain system performance.
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    Optimization parameters of rotary positioner controller using CDM
    (2009-11-01)
    Meemongkol, A.
    ;
    Tipsuwanporn, V.
    ;
    Numsomran, A.
    The authors present optimization parameters of rotary positioner controller in hard disk drive servo track writing process using coefficient diagram method; CDM. Due to estimation parameters in PI Positioning Control System by expected ratio method cannot meet the required specification of response effectively, we suggest coefficient diagram method for defining controller parameters under the requirement of the system. Finally, the simulation results show that our proposed method can improve the problem in tuning parameter of rotary positioner controller. It is satisfied specification of performance of control system. Furthermore, it is very convenient as a fast adjustment damping ratio as well as a high speed response.