Results 21 to 30 of about 117 (107)
Modelling the radar signature of rotorcraft
IET Radar, Sonar &Navigation, Volume 15, Issue 8, Page 867-883, August 2021., 2021 Abstract The problem of radar helicopter detection and classification requires simple and fast modelling of rotorcraft signature to aid the design of specific waveforms or to provide quality training data to machine learning algorithms. Here, we present a modular parametric model for the baseband radar cross‐section of helicopters in the narrowband ...
Guillaume Point +4 more
wiley +1 more source
Speed Control of Hydraulic Motor System with Swashplate DC-Controlled Pump [PDF]
Engineering and Technology Journal, 2009 In a previous study, speed-controlled hydraulic motor system hasemployed a DC motor for changing the swashplate angle of a variabledisplacement piston pump.
Majid A. Oleiwi, Amjed J. Humaidi
doaj +1 more source
Fault Prediction of Centrifugal Pump Based on Improved KNN
Shock and Vibration, Volume 2021, Issue 1, 2021., 2021 To effectively predict the faults of centrifugal pumps, the idea of machine learning k‐nearest neighbor algorithm (KNN) was introduced into the traditional Mahalanobis distance fault discrimination, and an improved centrifugal pump fault prediction model of KNN based on the Mahalanobis distance is proposed.
YunFei Chen +4 more
wiley +1 more source
Monitoring of helicopters swash-plate wear using the FAM-C diagnosis method
Diagnostyka, 2022 Helicopter rotor dynamics (blade vibrations, ground resonance, influence of forward speed, etc.) play an important role in the wear and tear of the transmission system and power unit.
Andrzej Jan Gębura +5 more
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Tribology Online, 2010 A thermohydrodynamic lubrication (THL) model of a hybrid (hydrostatic and hydrodynamic) thrust bearing is developed. It is applicable to a slipper of swashplate-type axial piston pumps and motors.
Toshiharu Kazama
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Effect of Operating Parameters on Efficiency of Swash-Plate Type Axial Piston Pump
Energies, 2022 In an effort to improve the energy economics of hydraulic systems, attention should be paid to reducing power losses in two main entities, energy converting components, and energy controlling and conveying components.
Heikki Kauranne
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Position Periodic Control of Two Rotating Airplanes
Drones, 2022 The increasing development in aerial vehicles shows a wide range of configurations for different requirements. Many of them combine conventional configurations’ features to take advantage of their qualities, such as performing a cruise flight as an ...
José Antonio Bautista-Medina +2 more
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Jixie chuandong, 2023 In order to study the influence of relevant parameters of the swashplate engine pendulum mechanism on engine dynamic performance, a mathematical model which can express the relationship between its design parameters and engine dynamic performance is ...
Deng Tao +3 more
doaj
Flow characteristics analysis of a balanced valve distribution double-row axial piston pump [PDF]
Mechanical Sciences, 2022 To study the flow characteristics of a new swashplate rotary valve distribution double-row axial piston pump, an instantaneous flow model was developed for the pump, the influences of structural parameters on the flow pulsation and uneven coefficient of ...
T. He +10 more
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Experimental and Numerical Vibration Analysis of Hydraulic Pipeline System under Multiexcitations
Shock and Vibration, Volume 2020, Issue 1, 2020., 2020 Pipeline systems in aircraft are subjected to both hydraulic pump pressure fluctuations and base excitation from the engine. This can cause fatigue failures due to excessive vibrations. Therefore, it is essential to investigate the vibration behavior of the pipeline system under multiexcitations.
Peixin Gao +5 more
wiley +1 more source