In this brief paper, controller design for delay margin optimization is considered systems with internal feedback delays (systems in the state variables). Similar to existing results on finite dimensional I/O delays, it shown that problem can be solved by using Nevanlinna-Pick interpolation involving non-minimum phase zeros of plant.

conclusions the individual characteristics, educational background and admission criteria had showed relation with academic failure. vulnerable students should be identified and educational supports should be provided for these students. results the frequency of course repetition, probation, and delayed graduation was reported to be 19.25%, 3.9% and 19.85%, respectively. gaining low grade in hi...

Multiloop delayed negative feedback systems, with each feedback loop having its own characteristic time lag (delay), are used to describe a great variety of systems: optical systems, neural networks, physiological control systems, etc. Previous investigations have shown that if the number of delayed feedback loops is greater than two, the system can exhibit complex dynamics and chaos, but in th...

This paper investigates the problem of the effect of delayed impulses on stability of impulsive time-delay systems. Two types of delayed impulses are considered, that is, the destabilizing delayed impulses and the stabilizing delayed impulses. Under the assumption of bounded impulse input delays, Lyapunov-type sufficient conditions for stability of nonlinear time-delay systems are derived for e...

This paper is concerned with the problem of synchronization for complex dynamic networks with state and coupling time-delays. Therefore, larger class and more complicated complex dynamic networks can be considered for the synchronization problem. Based on the Lyapunov-Krasovskii functional, a delay-independent criterion is obtained and formulated in the form of linear matrix inequalities (LMIs)...

Time delays are ubiquitous in real world and are often sources of complex behaviors of dynamical systems. This paper addresses the problem of parameters identification and synchronization of uncertain chaotic delayed systems subject to time-varying delay. Firstly, a novel and systematic adaptive scheme of synchronization is proposed for delayed dynamical systems containing uncertainties based o...

The work discovers a stochastic bifurcation in delayed systems in the presence of both delay and additive noise. To understand this phenomenon we present a stochastic center manifold method to compute a non-delayed stochastic order parameter equation for a scalar delayed system driven by additive uncorrelated noise. The derived order parameter equation includes additive and multiplicative white...

Time-delay is ubiquitous in many dynamical systems. The role of single and multiple time-delay on vibrational resonance in a single Duffing oscillator and in a system of n Duffing oscillators coupled unidirectionally and driven by both a lowand a high-frequency periodic force is presented. The investigation is performed through both theoretical approach and numerical simulation. Theoretically d...