Results 11 to 20 of about 8,154 (146)

Application of Linear Quadratic Gaussian and Coefficient Diagram Techniques to Distributed Load Frequency Control of Power Systems

open access: yesApplied Sciences, 2015
This paper presented both the linear quadratic Gaussian technique (LQG) and the coefficient diagram method (CDM) as load frequency controllers in a multi-area power system to deal with the problem of variations in system parameters and load demand change.
Tarek Hassan Mohamed   +2 more
doaj   +1 more source

Different Features of Control Systems for Single-Phase Voltage Source Inverters

open access: yesEnergies, 2020
The aim of this paper is to determine which type of control loop is better for each particular type of standard voltage source inverter (VSI) load (static, dynamic, nonlinear rectifier resistive-capacitive RC load).
Zbigniew Rymarski, Krzysztof Bernacki
doaj   +1 more source

Weakly Nonlinear Density-Velocity Relation [PDF]

open access: yes, 1996
We rigorously derive weakly nonlinear relation between cosmic density and velocity fields up to third order in perturbation theory. The density field is described by the mass density contrast, $\de$.
Chodorowski, Michal J., Lokas, Ewa L.
core   +2 more sources

A coefficient diagram method based AGC mechanism for an interconnected power system in coordination with UPFC and AC/DC link

open access: yesArchives of Electrical Engineering, 2020
Frequency regulation is in a first line of preference for an interconnected power system. Presence of nonlinearities in the generation systems further raises the complexity level of the problem.
A.K. Sahani   +3 more
doaj   +1 more source

Robust Control of Heat Exchangers

open access: yesChemical Engineering Transactions, 2012
This work deals with the design and application of a neuro-fuzzy controller to a heat exchanger and with possibilities to use the coefficient diagram method for heat exchanger control. The heat exchanger is a tubular one and it is used for pre-heating of
A. Vasickaninová, M. Bakošová
doaj   +1 more source

A New Frequency Control Strategy in an Islanded Microgrid Using Virtual Inertia Control-Based Coefficient Diagram Method

open access: yesIEEE Access, 2019
Renewable energy sources (RESs) are growing rapidly and highly penetrated in microgrids (MGs). As a result of the replacement of the synchronous generators with a large amount of RESs, the overall system inertia might be dramatically reduced which ...
Hossam Ali   +6 more
doaj   +1 more source

Torsional resonance suppression via the classical control method [PDF]

open access: yesSongklanakarin Journal of Science and Technology (SJST), 2004
This article presents torsional resonance suppression of a mechanical coupling system via the classical control approach. Three different methods are considered namely root locus method of PIDA compensator, pole placement method with two parameter ...
Chantaramas, R., Sujitjorn, S.
doaj  

Motor speed control system design considering a trade-off between response speed and noise reduction

open access: yesNihon Kikai Gakkai ronbunshu, 2016
This paper proposes an automatic tuning method for a motor speed control system. Parameters of a PI controller and a low-pass filter (LPF) for motor speed signal are automatically derived satisfying required specifications of a time constant of step ...
Kazuto YOKOYAMA, Masahiro IEZAWA
doaj   +1 more source

Wino Cold Dark Matter from Anomaly-Mediated SUSY Breaking [PDF]

open access: yes, 1999
The cosmological moduli problem is discussed in the framework of sequestered sector/anomaly-mediated supersymmetry (SUSY) breaking. In this scheme, the gravitino mass (corresponding to the moduli masses) is naturally 10 - 100 TeV, and hence the lifetime ...
Affleck   +35 more
core   +2 more sources

The X-Ray Concentration-Virial Mass Relation

open access: yes, 2007
We present the concentration (c)-virial mass (M) relation of 39 galaxy systems ranging in mass from individual early-type galaxies up to the most massive galaxy clusters, (0.06-20) x 10^{14} M_sun.
David A. Buote   +8 more
core   +1 more source

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