Results 1 to 10 of about 57,368 (118)

Minimization of the Settling Time of Variable Area Flowmeters [PDF]

Sensors, 2019
In the article a differential equation describing transient behavior of variable area (VA) meters has been developed and validated experimentally for air as a measured fluid and for two float shapes—plumb bob and sphere.
Mateusz Turkowski, Artur Szczecki, Maciej Szudarek   +2 more
doaj   +2 more sources

A Novel MSPLL-Based Method for Frequency Synthesis in Hydrogen MASER [PDF]

Sensors
Frequency synthesis is an important aspect of an atomic clock. It is also imperative that the synthesized frequency exhibits good short term stability or, in other words, exhibits good phase noise.
Dipika Simariya, Sheeba Rani Johnson, Dileep Dharmappa, Suresh Dakkumalla, Prem Ranjan Dubey, Roopa Malali Vasanthakumar, Deva Arul Daniel, Subramanya Ganesh Thirukkodi   +7 more
doaj   +2 more sources

Two-Phase Non-Singular Terminal Sliding Mode Control of Nonlinear Systems

Applied Sciences, 2023
This paper presents a two-phase non-singular terminal sliding mode control scheme for a class of nonlinear systems in the presence of external disturbances.
He Li, Chengshuang Tang
doaj   +1 more source

Influence of Process Parameters on Copper Content in Reduced Iron Silicate Slag in a Settling Furnace

Metals, 2021
During the pyrometallurgical extraction of copper, a significant fraction of this metal is lost with discard slag, which decreases profits and overall copper recovery.
Jenny Isaksson, Tommy Vikström, Andreas Lennartsson, Caisa Samuelsson   +3 more
doaj   +1 more source

A Neglected Issue: Stationary Phase Retention Determination of Classic High-Speed Counter-Current Chromatography Solvent Systems

Separations, 2022
Obtaining an ideal solvent system for target compounds is still an obstacle to the wide application of high-speed counter-current chromatography (HSCCC).
Sha Li, Tiandan Li, Xiaochao Hu, Yong Yang, Yangyi Huang, Kai He   +5 more
doaj   +1 more source

Dynamic Analysis of Fuzzy Systems

Applied Sciences, 2023
In this work, a new methodology for the dynamic analysis of non-linear systems is developed by applying the Mamdani fuzzy model. With this model, parameters such as settling time, peak time and overshoot will be obtained.
Manuel Barraza, Fernando Matía, Basil Mohammed Al-Hadithi   +2 more
doaj   +1 more source

Parametric and Coordinate Control of Oscillating Systems: Physics-Based Oscillation Feedback Design

IEEE Access, 2021
This paper presents and compares two practical implementation schemes based on parametric and coordinate control. The parametric feedback control idea employs a parametric resonance phenomenon.
Leonid Chechurin, Anton Mandrik, Konstantin Vostrov, Sergei Chechurin   +3 more
doaj   +1 more source

Direct Torque Control of an Induction Motor Using Fractional-Order Sliding Mode Control Technique for Quick Response and Reduced Torque Ripple

World Electric Vehicle Journal, 2023
The performance of electric drive propulsion systems is often degraded by the high torque and flux ripples of an electric drive. Traditional control methods, such as proportional plus integral (PI) controllers and classical sliding mode controllers (SMCs)
Satish Kumar Gudey, Mohan Malla, Kiran Jasthi, Srinivasa Rao Gampa   +3 more
doaj   +1 more source

Digital practical tracking: Algorithms with vector settling time [PDF]

Theoretical and Applied Mechanics, 2005
In this paper nonlinear stationary digital system with separated control is treated. The new definitions of practical tracking with vector settling time are presented.
Stojčić Mihajlo J.
doaj   +1 more source

Study on Porosity Measurement Determination Methods of a Shale Reservoir in the Longmaxi Formation, Sichuan Basin

Yankuang ceshi, 2022
BACKGROUND Porosity is a key parameter for exploration and evaluation of shale gas reservoirs. Rapid and accurate determination of shale porosity is crucial for reserve calculation.
WENG Jianqiao, LI Xiawei, QI Minghui, ZHANG Yeyu, WANG Yu, ZHANG Wei   +5 more
doaj   +1 more source