• observer-based robust controller design and realization of a gantry stage

    نویسندگان :
    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 936
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
      a precise positioning operation is typically required for gantry systems in applications such as drop ondemand (dod) printing processes, precision metrology, and circuit assembly. this work presents experimental results from studies of a disturbance observer (dob) based variable structure controller (vsc) for a gantry stage. for dob-based controllers, a nominal model is needed; however, obtaining the nominal model is difficult for systems with friction. a pseudo-random binary signal (prbs) is utilized to identify the linear nominal model of the gantry stage with friction. to compensate for friction effects, a filtered- vsc is studied to increase robustness and compensate for modeling uncertainties and external disturbances. experimental results demonstrate the effectiveness of the proposed robust control structure.

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