Analyzing stability of a delay differential equation involving two delays

Analysis of the systems involving delay is a popular topic among applied scientists. In the present work, we analyze the generalized equation $D^{\alpha} x(t) = g\left(x(t-\tau_1), x(t-\tau_2)\right)$ involving two delays viz. $\tau_1\geq 0$ and $\tau_2\geq 0$. We use the the stability conditions to propose the critical values of delays. Using examples, we show that the chaotic oscillations are observed in the unstable region only. We also propose a numerical scheme to solve such equations.Comment: 10 pages, 7 figure

Finite-Time Stability of Neutral Fractional Time-Delay Systems via Generalized Gronwalls Inequality

This paper studies the finite-time stability of neutral fractional time-delay systems. With the generalized Gronwall inequality, sufficient conditions of the finite-time stability are obtained for the particular class of neutral fractional time-delay systems

Finite-time stability analysis of fractional order time-delay systems: Gronwall's approach

In this paper, a stability test procedure is proposed for linear nonhomogeneous fractional order systems with a pure time delay. Some basic results from the area of finite time and practical stability are extended to linear, continuous, fractional order time-delay systems given in state-space form. Sufficient conditions of this kind of stability are derived for particular class of fractional time-delay systems. A numerical example is given to illustrate the validity of the proposed procedure

Finite-time stability analysis of fractional order time delay systems: Bellman-Gronwall's approach

Ovaj rad proširuje neke osnovne rezultate iz oblasti praktične stabilnosti i stabilnosti na konačnom vremenskom intervalu na nelinearne, perturbovane sisteme sa kašnjenjem necelobrojnog reda gde je predložen postupak testiranja robusne stabilnosti. Proučavan je problem dovoljnih uslova koji omogućavaju da trajektorije sistema ostaju unutar a priori zadatih skupova i to za posebnu klasu nelinearnih sistema sa kašnjenjem necelobrojnog reda.The paper extends some basic results from the area of finite time and practical stability to nonlinear, perturbed, fractional order time-delay systems where a robust stability test procedure is proposed. The problem of sufficient conditions that enable system trajectories to stay within the a priori given sets for the particular class of nonlinear fractional order time delay systems is examined

Finite-time stability analysis of fractional order time delay systems: Bellman-Gronwall's approach

Ovaj rad proširuje neke osnovne rezultate iz oblasti praktične stabilnosti i stabilnosti na konačnom vremenskom intervalu na nelinearne, perturbovane sisteme sa kašnjenjem necelobrojnog reda gde je predložen postupak testiranja robusne stabilnosti. Proučavan je problem dovoljnih uslova koji omogućavaju da trajektorije sistema ostaju unutar a priori zadatih skupova i to za posebnu klasu nelinearnih sistema sa kašnjenjem necelobrojnog reda.The paper extends some basic results from the area of finite time and practical stability to nonlinear, perturbed, fractional order time-delay systems where a robust stability test procedure is proposed. The problem of sufficient conditions that enable system trajectories to stay within the a priori given sets for the particular class of nonlinear fractional order time delay systems is examined

On the mixed sensitivity minimization for systems with infinitely many unstable modes

In this note we consider a class of linear time invariant systems with infinitely many unstable modes. By using the parameterization of all stabilizing controllers and a data transformation, we show that ℋ ∞ controllers for such systems can be computed using the techniques developed earlier for infinite dimensional plants with finitely many unstable modes. © 2004 Elsevier B.V. All rights reserved

Robust finite-time stability of uncertain neutral nonhomogeneous fractional-order systems with time-varying delays

This article addresses the problem of finite-time stability for uncertain neutral nonhomogeneous fractional-order systems with time-varying delays where a stability test procedure is suggested. Based on the extended form of the generalized Gronwall inequality, a new sufficient condition for robust finite-time stability of such systems is established. Finally, a numerical example is given to show the effectiveness of the obtained result