Zobrazeno 1 - 10
of 55
pro vyhledávání: '"Ali Kandil"'
Publikováno v:
AIMS Mathematics, Vol 9, Iss 5, Pp 12928-12963 (2024)
In an active magnetic bearings (AMBs) model, every pair of opposite poles is aligned at an angle with the horizontal axis. In some configurations, there is a pair of poles which is in line with the horizontal axis. In other configurations, the same p
Externí odkaz:
https://doaj.org/article/cd1193c788da4d7992d889df62eb6ddd
Publikováno v:
Shock and Vibration, Vol 2023 (2023)
This paper introduces a study on the horizontal and vertical deflections of the cross section of a thin-walled rotating beam. These deflections are governed by a system of two ordinary differential equations in order to describe their Cartesian direc
Externí odkaz:
https://doaj.org/article/0cc70d96248c49e499098bf744ef039f
Autor:
Ali Kandil, Y. S. Hamed
Publikováno v:
IEEE Access, Vol 9, Pp 73857-73872 (2021)
This paper presents a tuned positive position feedback controller (TPPF) to overcome the dual high peaks of the classical PPF. This control signal is merged with a proportional-derivative (PD) control signal to suppress the vibrations of a constant-s
Externí odkaz:
https://doaj.org/article/4c09043f484d4933a17df22b819d6f9f
Publikováno v:
IEEE Access, Vol 9, Pp 133694-133709 (2021)
The proposed work focuses on improving the performance of the traditional nonlinear saturation controller (NSC) algorithm. In this work, a tuning mechanism can be implemented by providing the NSC control unit with the measured speed $\Omega $ of the
Externí odkaz:
https://doaj.org/article/66d4d3d93f79476a9f0d9fe6d84437cc
Publikováno v:
IEEE Access, Vol 9, Pp 153012-153026 (2021)
This paper focuses on controlling the dynamics of a mass-damper-spring model via a servo-controlled linear actuator (SCLA). The displacements of the mass are sensed and measured by a linear variable differential transformer (LVDT) whose output electr
Externí odkaz:
https://doaj.org/article/1068cfd6659d4cd4adb5a2c038b5f02e
Publikováno v:
Symmetry, Vol 14, Iss 6, p 1247 (2022)
This research is concerned with extracting the approximate solutions of a controlled mass-damper-spring model via the harmonic balance method. The stability of these solutions was checked with the aid of Floquet theory. A nonlinear saturation control
Externí odkaz:
https://doaj.org/article/342fcca9c50c425eb53537be96853117
Publikováno v:
Mathematics, Vol 10, Iss 8, p 1282 (2022)
The present work discusses the dynamical analysis of the superharmonic resonance in a mass-damper-spring model controlled by a cubic-position negative-velocity feedback (CPNV) controller. Thanks to the harmonic balance technique, the approximate solu
Externí odkaz:
https://doaj.org/article/57fdc1725c874a56b6a9bfd8e0ef500f
Publikováno v:
Symmetry, Vol 14, Iss 4, p 685 (2022)
A cubic-position negative-velocity (CPNV) feedback controller is proposed in this research in order to suppress the nontrivial oscillations of the 1/3 order subharmonic resonance of a mass-damper-spring model. Based on the Krylov–Bogoliubov (KB) av
Externí odkaz:
https://doaj.org/article/15070f50d2c44192aa5615d9caa2d733
Autor:
Yasser Salah Hamed, Ali Kandil
Publikováno v:
Symmetry, Vol 13, Iss 1, p 85 (2021)
Time delay is an obstacle in the way of actively controlling non-linear vibrations. In this paper, a rotating blade’s non-linear oscillations are reduced via a time-delayed non-linear saturation controller (NSC). This controller is excited by a pos
Externí odkaz:
https://doaj.org/article/369229f2f22140f1b965f28016125e58
Autor:
Goutham Mylavarapu, Robert J. Fleck, Michale S. Ok, Lili Ding, Ali Kandil, Raouf S. Amin, Bobby Das, Mohamed Mahmoud
Publikováno v:
Journal of Clinical Medicine, Vol 9, Iss 11, p 3723 (2020)
General anesthesia decreases the tone of upper airway muscles in a dose-dependent fashion, potentially narrowing the pharyngeal airway. We examined the effects of adding ketamine on the airway configuration after dexmedetomidine administration in spo
Externí odkaz:
https://doaj.org/article/3f1a59ef633443fcb086ee7127b5794a