Browsing by Subject "Uncertain system"
Now showing 1 - 2 of 2
Results Per Page
Sort Options
Item Open Access Controller design for plants with internal delayed feedback(Institute of Electrical and Electronics Engineers, 2022-05-01) Gündeş, A. N.; Özbay, HitayA special class of retarded and neutral time delay systems is considered. These are plants with internal delayed feedback, and they may have finitely many or infinitely many unstable poles. Stabilizing controllers are obtained from a particular interpolation. A parametrization of all stabilizing integral-action controllers is obtained. Examples are given to illustrate this simple design procedure and its robustness properties for various uncertainties.Item Open Access Design of a switched robust control scheme for drug delivery in blood pressure regulation(Elsevier B.V., 2016) Ahmed, S.; Özbay, HitayA control algorithm based on switching robust controllers is presented for a Linear Parameter Varying (LPV) time-delay system modeling automatic infusion of vasodilator drug to regulate postsurgical hypertension. The system is scheduled along a measurable signal trajectory. The prospective controllers are robustly designed at various operating points forming a finite set of robust controllers and then a hysteresis switching is performed between neighboring robust controllers for a larger operating range of the LPV system. The stability of the switching LPV system for the entire operating range is ensured by providing a sufficient condition in terms of bound on the scheduling signal variation using the concept of dwell time. Simulation results are provided to verify the performance of the designed control scheme. © 2016