We propose a piezoelectric transducer-(PZT-) based optoelectronic frequency synchronizer to control simultaneously change in the repetition rate, the relative pulse delay, and the phase noise of a passively mode-locked femtosecond Ti:sapphire laser with an intracavity saturable Bragg reflector absorber with respect to an electronic frequency reference. An optoelectronic phase-locked-loop-based ...

We present a core-stateless quality of service architecture for achieving delay differentiation between flows. There are two key components in our approach: 1. Per-class per-hop relative average delay: the average queueing delay perceived by the packets in a delay class at a link is inversely proportional to the delay weight of the class. 2. Per-flow end-to-end delay class adaptation: the delay...

A boundary-value problem for a couple of scalar nonlinear differential equations with delay and several generalized proportional Caputo fractional derivatives is studied. Ulam-type stability the given investigated. Sufficient conditions existence an arbitrary parameter are obtained. In study stability, this was chosen to depend on solution corresponding inequality. We provide sufficient Ulam–Hy...

It is well known that max-weight policies based on a queue backlog index can be used to stabilize stochastic networks, and that similar stability results hold if a delay index is used. Using Lyapunov optimization, we extend this analysis to design a utility maximizing algorithm that uses explicit delay information from the head-of-line packet at each user. The resulting policy is shown to ensur...

In this paper, we consider the control of time delay system by Proportional-Integral (PI) controller. By Using the HermiteBiehler theorem, which is applicable to quasi-polynomials, we seek a stability region of the controller for first order delay systems. The essence of this work resides in the extension of this approach to second order delay system, in the determination of its stability regio...

The common rail pressure of a marine diesel engine high-pressure system is typically controlled by PID (Proportional Integral Differential) algorithm, which has problems with both overshoot and response delay. In this paper, the control method based on object model for studied. established within controller. Through developed current actual obtained real-time acquisition, variables issued contr...

An improved continuous-cycling method is proposed for the autotuning of proportional–integral–derivative (PID) controller. The can identify frequency response process at a preset phase angle without modeling error. Moreover, it provides an exact even if static disturbance present. version method. gain proportional controller in updated to obtain status automatically. To guarantee response, we p...