Results 81 to 90 of about 1,811,075 (266)

The Penalty resolution of the spectral element discretization of the time dependent Darcy equations

Boundary Value Problems
The time-dependent Darcy system, when discretized in time using the implicit Euler scheme and in space using the spectral element method, can be efficiently solved using the penalty method.
Nejmeddine Chorfi, Mohamed Abdelwahed, Henda Ouertani   +2 more
doaj   +1 more source

Sliding Mode Control in Aerospace Applications: A Survey

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT Sliding mode control (SMC) enjoys robustness to matched and unmatched (in the case of minimum phase input‐output dynamics) bounded perturbations, and finite time convergence. Second‐order and higher‐order sliding mode control systems (2‐SMC/HOSMC) retain all the advantages of sliding mode control, but in addition can be applied to systems of ...
Yuri Shtessel, Christopher Edwards
wiley   +1 more source

Application of Fully Implicit Discontinuous Galerkin Wet–Dry Scheme for Shallow Water Equations

Applied Sciences
Moving boundaries (often called free boundaries) in shallow-water equations mark the time-dependent water line between ‘(flooded) wet’ and ‘dry’ regions and this feature is of utmost practical importance and should be adequately incorporated into the ...
Haegyun Lee
doaj   +1 more source

A Robust Spline Collocation Method for Pricing American Put Options

Discrete Dynamics in Nature and Society, 2019
In this paper a robust numerical method is proposed for pricing American put options. The Black-Scholes differential operator in the original form is discretized by using a quadratic spline collocation method on a piecewise uniform mesh for the spatial ...
Zhongdi Cen, Anbo Le, Aimin Xu
doaj   +1 more source

Construction of positivity-preserving numerical method for stochastic SIVS epidemic model

Advances in Difference Equations, 2019
In this paper we propose the balanced implicit numerical techniques for maintaining the nonnegative path of the solution in stochastic susceptible–infected–vaccinated–susceptible (SIVS) epidemic model.
Wenrui Li, Qimin Zhang
doaj   +1 more source

High‐Order Sliding‐Mode control for MIMO Systems

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT This paper extends Lyapunov‐based homogeneous high‐order sliding‐mode control to a class of uncertain non‐square multi‐input multi‐output (MIMO) nonlinear systems with a well‐defined vector relative degree. The considered systems admit a normal‐form representation with an uncertain but full‐row‐rank input‐gain matrix.
Jaime A. Moreno, Angel Mercado‐Uribe
wiley   +1 more source

Sliding Motions on Non‐Euclidean State Spaces: A Differential‐Geometric Perspective

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT This paper extends sliding‐mode control theory to nonlinear systems evolving on smooth manifolds. Building on differential geometric methods, we reformulate Filippov's notion of solutions, characterize well‐defined vector fields on quotient spaces, and provide a consistent geometric definition of higher‐order sliding modes.
Fernando Castaños
wiley   +1 more source

Parallel Algorithm for Conversation Laws with Unstructured Grids

工程科学与技术, 2015
:Efficient parallel algorithm on distributed-memory multi-computers was presented for solving Euler equations on unstructured grids.Domain decomposition method was employed to handle meshes properly and make each processor ...
马欣荣, 刘三阳
doaj  

On the Euler implicit/explicit iterative scheme for the stationary Oldroyd fluid

Numerical Methods for Partial Differential Equations, 2018
In this article, we consider the stationary Oldroyd fluid equations from the large time behavior research of the nonstationary equations. Thus, to obtain its numerical solution, we first solve the nonstationary Oldroyd fluid equations via the Euler implicit/explicit finite element method with the integral term discretized by the right‐hand rectangle ...
Yingwen Guo, Yinnian He
openaire   +2 more sources

Sliding Mode Control and Observation for Upper Limb Robotics Rehabilitation

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT Stroke is a leading cause of upper limb motor impairments, which often require rehabilitation. General purpose robotic manipulators enable effective therapy through exercises such as Center Out Point‐to‐Point (CO‐PTP) and Teach‐and‐Track (TT), which respectively demand accurate estimation and rejection of the interaction force exerted by the ...
Antonella Ferrara, Chiara Alessi, Nikolas Sacchi   +2 more
wiley   +1 more source