Results 81 to 90 of about 8,963 (248)

On parameterized Lyapunov–Krasovskii functional techniques for investigating singular time-delay systems

open access: yes, 2011
The problem of robust stability of a singular time-delay system is investigated. A novel Lyapunov–Krasovskii functional (LKF) is introduced which is a singular-type complete quadratic Lyapunov–Krasovskii functional with polynomial parameters.
Peng, Ji-Gen   +5 more
core   +1 more source

A Functional Interpolation Approach to Compute Periodic Orbits in the Circular-Restricted Three-Body Problem

open access: yes, 2021
In this paper, we develop a method to solve for periodic orbits, i.e., Lyapunov and Halo orbits, using a functional interpolation scheme called the Theory of Functional Connections (TFC).
Martin W. Lo   +2 more
core   +1 more source

Enhancing Reference Tracking in Induction Motor Drives: A Hybrid Model Predictive Control and Artificial Neural Network Approach

open access: yesInternational Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT Induction motors (IMs) are widely used in industry for their robustness and cost‐effectiveness, yet their nonlinear and multivariable dynamics pose significant challenges for high‐performance speed control. Model Predictive Control (MPC) is a well‐established solution but suffers from limitations related to model accuracy and parameter ...
Asier del Rio   +4 more
wiley   +1 more source

Explicit examples of arbitrarily large analytic ergodic potentials with zero Lyapunov exponent

open access: yes, 2006
We give explicit examples of arbitrarily large analytic ergodic potentials for which the Schrodinger equation has zero Lyapunov exponent for certain energies. For one of these energies there is an explicit solution.
Bjerklöv, Kristian
core   +1 more source

Traveling waves of a delayed epidemic model with spatial diffusion

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2017
In this paper, we study the existence and non-existence of traveling waves for a delayed epidemic model with spatial diffusion. That is, by using Schauder's fixed-point theorem and the construction of Lyapunov functional, we prove that when the basic ...
Wu Pei, Qiaoshun Yang, Zhiting Xu
doaj   +1 more source

Control System for the Navigation of the Agricultural Robots: A Review

open access: yesJournal of Field Robotics, EarlyView.
ABSTRACT Control systems for the navigation of autonomous agricultural robots—particularly those operating in uneven terrain and in the presence of static or dynamic obstacles—have advanced considerably in recent years. As conventional machinery evolves toward increasingly automated systems, the design of reliable navigation controllers has become ...
Edna Carolina Moriones Polanía   +3 more
wiley   +1 more source

Emergent Chaos‐Like Dynamics of Spin–Orbit‐Torque‐Driven Magnetic Transitions

open access: yesSmall, EarlyView.
By combining anisotropy‐engineered nanometer‐scale nucleation sites with time‐resolved x‐ray holography and micromagnetic modeling, magnetization dynamics are directly imaged, revealing chaos‐like fluctuations and skyrmion shedding and highlighting the intrinsic complexity of spin‐orbit torque driven systems.
L.‐M. Kern   +14 more
wiley   +1 more source

Lyapunov stability analysis of higher-order 2-D systems

open access: yes
We give necessary and sufficient conditions, based on the existence of a Lyapunov functional, for the asymptotic stability of a square autonomous 2-D behavior in the sense of ...
Kojima, Chiaki   +2 more
core   +1 more source

Numerical study of a Lyapunov functional for the complex Ginzburg-Landau equation

open access: yes, 2012
We numerically study in the one-dimensional case the validity of the functional calculated by Graham and coworkers (Graham and Tel, 1990; Descalzi and Graham, 1994) as a Lyapunov potential for the Complex Ginzburg-Landau equation.
Hernández-García, Emilio   +2 more
core   +1 more source

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