The Experts below are selected from a list of 61527 Experts worldwide ranked by ideXlab platform
Yehia Massoud - One of the best experts on this subject based on the ideXlab platform.
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design of a maximally flat optical Low Pass Filter using plasmonic nanostrip waveguides
Optics Express, 2007Co-Authors: Amir Hosseini, Hamid Nejati, Yehia MassoudAbstract:In this paper, we present a new optical range Low Pass Filter based on plasmonic nanostrip waveguides. We calculate the characteristic impedance of plasmonic nanostrip waveguides and compare it with that of microstrip transmission lines. An optical range maximally flat Low Pass Filter with subwavelength dimensions is designed based on the nanostrip waveguide structure. Finite-difference time-domain (FDTD) simulations of the designed optical range Filter are presented, which demonstrate subwave-length light confinement as well as acceptable Filter cutoff performance.
Amir Hosseini - One of the best experts on this subject based on the ideXlab platform.
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design of a maximally flat optical Low Pass Filter using plasmonic nanostrip waveguides
Optics Express, 2007Co-Authors: Amir Hosseini, Hamid Nejati, Yehia MassoudAbstract:In this paper, we present a new optical range Low Pass Filter based on plasmonic nanostrip waveguides. We calculate the characteristic impedance of plasmonic nanostrip waveguides and compare it with that of microstrip transmission lines. An optical range maximally flat Low Pass Filter with subwavelength dimensions is designed based on the nanostrip waveguide structure. Finite-difference time-domain (FDTD) simulations of the designed optical range Filter are presented, which demonstrate subwave-length light confinement as well as acceptable Filter cutoff performance.
Yong He - One of the best experts on this subject based on the ideXlab platform.
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simultaneous optimisation of the Low Pass Filter and state feedback controller in a robust repetitive control system
Iet Control Theory and Applications, 2010Co-Authors: Min Wu, Yong HeAbstract:A Low-Pass Filter is inserted in a repetitive controller to guarantee the stability of the modified repetitive-control system. The control precision strongly depends on the parameter of the Filter. This study presents a method of simultaneously optimising the parameters of the Low-Pass Filter and state feedback of a modified repetitive-control system in which the plant contains a class of uncertainties. First, the relationship between the control precision of a repetitive-control system and a Low-Pass Filter is explained. Next, a linear matrix inequality (LMI)-based robust-stability condition is derived for fixed state-feedback gains. This condition is transformed into a generalised eigenvalue problem and is used to calculate the maximum cut-off angular frequency of the Low-Pass Filter. Then, another LMI-based robust-stability condition is derived for a fixed Low-Pass Filter, and is employed to find H∞ static-state-feedback gains. Moreover, an iterative algorithm that combines these two robust-stability conditions is designed that yields the largest bandwidth while guaranteeing closed-loop robust stability. The conservativeness of the result produced by the algorithm is the same as that of the less conservative of the two robust-stability conditions. Finally, two numerical examples demonstrate the validity of the method.
Hamid Nejati - One of the best experts on this subject based on the ideXlab platform.
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design of a maximally flat optical Low Pass Filter using plasmonic nanostrip waveguides
Optics Express, 2007Co-Authors: Amir Hosseini, Hamid Nejati, Yehia MassoudAbstract:In this paper, we present a new optical range Low Pass Filter based on plasmonic nanostrip waveguides. We calculate the characteristic impedance of plasmonic nanostrip waveguides and compare it with that of microstrip transmission lines. An optical range maximally flat Low Pass Filter with subwavelength dimensions is designed based on the nanostrip waveguide structure. Finite-difference time-domain (FDTD) simulations of the designed optical range Filter are presented, which demonstrate subwave-length light confinement as well as acceptable Filter cutoff performance.
Min Wu - One of the best experts on this subject based on the ideXlab platform.
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simultaneous optimisation of the Low Pass Filter and state feedback controller in a robust repetitive control system
Iet Control Theory and Applications, 2010Co-Authors: Min Wu, Yong HeAbstract:A Low-Pass Filter is inserted in a repetitive controller to guarantee the stability of the modified repetitive-control system. The control precision strongly depends on the parameter of the Filter. This study presents a method of simultaneously optimising the parameters of the Low-Pass Filter and state feedback of a modified repetitive-control system in which the plant contains a class of uncertainties. First, the relationship between the control precision of a repetitive-control system and a Low-Pass Filter is explained. Next, a linear matrix inequality (LMI)-based robust-stability condition is derived for fixed state-feedback gains. This condition is transformed into a generalised eigenvalue problem and is used to calculate the maximum cut-off angular frequency of the Low-Pass Filter. Then, another LMI-based robust-stability condition is derived for a fixed Low-Pass Filter, and is employed to find H∞ static-state-feedback gains. Moreover, an iterative algorithm that combines these two robust-stability conditions is designed that yields the largest bandwidth while guaranteeing closed-loop robust stability. The conservativeness of the result produced by the algorithm is the same as that of the less conservative of the two robust-stability conditions. Finally, two numerical examples demonstrate the validity of the method.
