Results 51 to 60 of about 238,303 (293)

Current Tracking Adaptive Control of Brushless DC Motors

International Journal of Adaptive Control and Signal Processing, EarlyView.
In this paper, the current tracking for Brushless Direct Current motors is approached considering uncertainty in the parameters of the motor's model. An adaptive control scheme to compensate electrical parameters uncertainty is proposed without requiring any knowledge of the mechanical parameters.
Fernanda Ramos‐García, Axel Coronado‐Andrade, Gerardo Espinosa‐Pérez, Luis Alvarez‐Icaza   +3 more
wiley   +1 more source

Coexistence for a resource-based growth model with two resources

Electronic Journal of Qualitative Theory of Differential Equations, 2003
We investigate the coexistence of positive steady-state solutions to a parabolic system, which models a single species on two growth-limiting, non-reproducing resources in an un-stirred chemostat with diffusion.
Yifu Wang, Y. Meng
doaj   +1 more source

An Adaptive Human Pilot Model With Reaction Time Delay for Enhanced Adaptive Control in Piloted Systems

International Journal of Adaptive Control and Signal Processing, EarlyView.
This work introduces an adaptive human pilot model that captures pilot time‐delay effects in adaptive control systems. The model enables the prediction of pilot–controller interactions, facilitating safer integration and improved design of adaptive controllers for piloted applications.
Abdullah Habboush, Yildiray Yildiz
wiley   +1 more source

Subleading soft graviton theorem for loop amplitudes

Journal of High Energy Physics, 2017
Superstring field theory gives expressions for heterotic and type II string loop amplitudes that are free from ultraviolet and infrared divergences when the number of non-compact space-time dimensions is five or more.
Ashoke Sen
doaj   +1 more source

The Cosmic No-Hair Theorem and the Nonlinear Stability of Homogeneous Newtonian Cosmological Models

, 1994
The validity of the cosmic no-hair theorem is investigated in the context of Newtonian cosmology with a perfect fluid matter model and a positive cosmological constant. It is shown that if the initial data for an expanding cosmological model of this type
Alan Rendall, Barrow J D, Bildhauer S, Christodoulou D, Ehlers J, Ellis G F R, Heckmann O, John F, Klainerman S, Kobayashi S, Majda A, Makino T, Oscar Reula, Peebles P J E, Rein G, Sideris T, Uwe Brauer   +16 more
core   +1 more source

Double soft theorem for perturbative gravity [PDF]

Journal of High Energy Physics, 2016
14 pages, 8 figures, references added, matches published ...
openaire   +3 more sources

A Robust Adaptive One‐Sample‐Ahead Preview Super‐Twisting Sliding Mode Controller

International Journal of Adaptive Control and Signal Processing, EarlyView.
Block Diagram of the Robust Adaptive One‐Sample‐Ahead Preview Super‐Twisting Sliding Mode Controller. ABSTRACT This article introduces a discrete‐time robust adaptive one‐sample‐ahead preview super‐twisting sliding mode controller. A stability analysis of the controller by Lyapunov criteria is developed to demonstrate its robustness in handling both ...
Guilherme Vieira Hollweg, Paulo Jefferson Dias de Oliveira Evald, Shivam Chaturvedi, Hilton Abilio Gründling, Rodrigo Varella Tambara, Wencong Su   +5 more
wiley   +1 more source

Note on multiplicative perturbation of local $C$-regularized cosine functions with nondensely defined generators

Electronic Journal of Qualitative Theory of Differential Equations, 2010
In this note, we obtain a new multiplicative perturbation theorem for local $C$-regularized cosine function with a nondensely defined generator $A$. An application to an integrodifferential equation is given.
Fang Li, James H. Liu
doaj   +1 more source

Calculation of single-beam two-photon absorption rate of lanthanides: effective operator method and perturbative expansion

, 2004
Perturbative contributions to single-beam two-photon transition rates may be divided into two types. The first, involving low-energy intermediate states, require a high-order perturbation treatment, or an exact diagonalization.
Axe, Bloch, Brandow, Bryson, Burdick, Burdick, Ceulemans, Chang-Kui Duan, Chase, Dagenais, Denning, Downer, Downer, Downer, Duan, Duan, Duan, Gang Ruan, Gâcon, Goldstone, Hurtubise, Judd, Killingbeck, Leavitt, Lindgren, Lindgren, McCaw, Michael F. Reid, Murdoch, Reid, Schucan, Smentek, Sytsma, Thorne, Thorne, Wang   +35 more
core   +1 more source

Nash--Moser iteration and singular perturbations [PDF]

, 2011
We present a simple and easy-to-use Nash--Moser iteration theorem tailored for singular perturbation problems admitting a formal asymptotic expansion or other family of approximate solutions depending on a parameter $\eps\to 0.$ The novel feature is to ...
Texier, Benjamin, Zumbrun, Kevin
core   +2 more sources