On the matrix version of extended Bessel functions and its application to matrix differential equations

2021 ◽  
pp. 1-20
Author(s):  
Ahmed Bakhet ◽  
Fuli He ◽  
Mimi Yu
Keyword(s):  
Differential Equations ◽  
Bessel Functions ◽  
Matrix Version ◽  
The Matrix ◽  
Matrix Differential Equations ◽  
Matrix Differential

On matrix differential equations with several unbounded delays

2006 ◽  
Vol 17 (4) ◽  
pp. 417-433 ◽  
Author(s):  
J. ĈERMÁK
Keyword(s):  
Differential Equation ◽  
Differential Equations ◽  
Delay Equation ◽  
Matrix Differential Equation ◽  
Continuous Vector ◽  
Asymptotic Bounds ◽  
The Matrix ◽  
Exponentially Stable ◽  
Matrix Differential Equations ◽  
Matrix Differential

The paper focuses on the matrix differential equation \[ \dot y(t)=A(t)y(t)+\sum_{j=1}^{m}B_j(t)y(\tau_j(t))+f(t),\quad t\in I=[t_0,\infty)\vspace*{-3pt} \] with continuous matrices $A$, $B_j$, a continuous vector $f$ and continuous delays $\tau_j$ satisfying $\tau_k\circ\tau_l =\tau_l\circ\tau_k$ on $I$ for any pair $\tau_k,\tau_l$. Assuming that the equation \[ \dot y(t)=A(t)y(t)\] is uniformly exponentially stable, we present some asymptotic bounds of solutions $y$ of the considered delay equation. A system of simultaneous Schröder equations is used to formulate these asymptotic bounds.

scholarly journals Calibrating linear continuous-time dynamical systems via perturbation analysis

Filomat ◽  
2018 ◽  
Vol 32 (5) ◽  
pp. 1909-1915
Author(s):  
Peter Weng ◽  
Frederick Phoa
Keyword(s):  
Dynamical Systems ◽  
Differential Equations ◽  
Perturbation Analysis ◽  
Continuous Time ◽  
Riccati Equations ◽  
Linear Dynamical Systems ◽  
The Matrix ◽  
Matrix Differential Equations ◽  
Matrix Differential ◽  
Time Linear

This work considered the continuous-time linear dynamical systems described by the matrix differential equations, and aimed at studying the perturbation analysis via solving perturbed linear dynamical systems. In specific, we solved Riccati differential equations and continuous-time algebraic Riccati equations with finite and infinite times respectively. Moreover, we stated some assumptions on the existence and uniqueness of the solutions of the perturbed Riccati equations. Similar techniques were applied to the discrete-time linear dynamical systems. Two numerical examples illustrated the efficiency and accuracy.

scholarly journals Design of Terminal Sliding Mode Controllers for Disturbed Non-Linear Systems Described by Matrix Differential Equations of the Second and First Orders

2019 ◽  
Vol 9 (11) ◽  
pp. 2325 ◽  
Author(s):  
Paweł Skruch ◽  
Marek Długosz
Keyword(s):  
Differential Equations ◽  
Sliding Mode ◽  
Sliding Surface ◽  
Terminal Sliding Mode ◽  
Sliding Mode Controllers ◽  
System Trajectory ◽  
Non Linear ◽  
Matrix Differential Equations ◽  
Non Linear Systems ◽  
Matrix Differential

This paper describes a design scheme for terminal sliding mode controllers of certain types of non-linear dynamical systems. Two classes of such systems are considered: the dynamic behavior of the first class of systems is described by non-linear second-order matrix differential equations, and the other class is described by non-linear first-order matrix differential equations. These two classes of non-linear systems are not completely disjointed, and are, therefore, investigated together; however, they are certainly not equivalent. In both cases, the systems experience unknown disturbances which are considered bounded. Sliding surfaces are defined by equations combining the state of the system and the expected trajectory. The control laws are drawn to force the system trajectory from an initial condition to the defined sliding surface in finite time. After reaching the sliding surface, the system trajectory remains on it. The effectiveness of the approaches proposed is verified by a few computer simulation examples.

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