Results 21 to 30 of about 757,225 (314)
A frequency-domain approach to the analysis of stability and bifurcations in nonlinear systems described by differential-algebraic equations [PDF]
, 2007 A general numerical technique is proposed for the assessment of the stability of periodic solutions and the determination of bifurcations for limit cycles in autonomous nonlinear systems represented by ordinary differential equations in the differential ...
Bonani, Fabrizio +3 more
core +1 more source
Pulsed Optically Pumped Rubidium Clock With High Frequency-Stability Performance
, 2012 In this paper, we present the performance of a vapor-cell rubidium frequency standard working in the pulsed regime, in which the clock signal is represented by a Ramsey pattern observed on an optically detected laser absorption signal.
Micalizio, Salvatore +5 more
core +2 more sources
Frequency criteria for exponential stability
IMA Journal of Mathematical Control and Information, 2022 Abstract We discuss some frequency-domain criteria for the exponential stability of nonlinear feedback systems based on Popov’s hyperstability theorem. The main results are new bounds on convergence rates for perturbations of the damped harmonic oscillator, including the Hessian-damped case, when the perturbations satisfy certain ...
openaire +2 more sources
Design consideration for frequency containment reserve provisions by a multi‐terminal HVDC system
IET Generation, Transmission & Distribution, 2023 Frequency control is considered to be an important function of multi‐terminal HVDC (MTDC) systems. Sharing frequency containment reserves (FCRs) among interconnected AC systems using HVDC technology is particularly attractive in the European context ...
Kosei Shinoda +5 more
doaj +1 more source
Multivariable Repetitive-predictive Controllers using Frequency Decomposition [PDF]
, 2012 Repetitive control is a methodology for the tracking of a periodic reference signal. This paper develops a new approach to repetitive control systems design using receding horizon control with frequency decomposition of the reference signal.
Rogers, E +7 more
core +1 more source
Current limitations of cryogenic microwave oscillator frequency stability
, 2014 Technical paperCryogenic microwave oscillators built upon sapphire loaded cavity resonators exhibit excellent levels of frequency stability. Here we present an overview of the current understanding of the various processes and noise sources that limit ...
Parker, S. +7 more
core +1 more source
EnergiesTo address the frequency regulation requirements of hybrid energy storage (HES) in renewable-dominated power grids, this paper proposes an asymmetric droop control strategy based on an improved backpropagation (BP) neural network.
Qiang Zhang +7 more
doaj +1 more source
Decentralized Adaptive Under Frequency Load Shedding Scheme Based on Load Information
IEEE Access, 2019 The inertia of the power system changes when the generators in the system are disturbed or tripped. However, in some systems, there is no control center or communication device falling behind.
Peican He, Buying Wen, Huaiyuan Wang
doaj +1 more source
An optical fibre-based frequency dissemination network for Australia
, 2011 An optical-fibre network is being planned for distribution of optical and microwave reference frequencies in Australia. This network would connect a number of research facilities and the National Measurement Institute (NMI), allowing long-range ...
Luiten, A. +9 more
core +1 more source
IEEE Open Access Journal of Power and EnergyThe virtual synchronous generator (VSG) is the most widely used grid-forming inverter (GFMI) control technique. The VSG can provide enhanced ancillary services and improved dynamic response compared to conventional synchronous generators and grid ...
Chalitha Liyanage +2 more
doaj +1 more source