Results 21 to 30 of about 656 (167)
Advances in Materials Science and Engineering, Volume 2022, Issue 1, 2022., 2022 At present, with the rapid development of the material market, the requirements of high performance and high precision of materials are increasingly exposed. Nanomagnetic fluid materials are more and more widely used in oil film bearings, but their compressive strength and performance are insufficient, which is difficult to meet the current ...
Han Peng +3 more
wiley +1 more source
A method for reducing parasite drag of medium transport helicopter
Авіаційно-космічна техніка та технологія, 2023 At present, more and more stringent emission requirements are being imposed on helicopters. Carbon dioxide emissions are a function of fuel consumption, and fuel consumption is directly dependent on the power required for a helicopter cruise flight.
Mykhaylo Kybalnyy +3 more
doaj +1 more source
IEEE Access, 2020 In order to decrease the tilt and eccentric abrasion of a slipper and improve the lubrication performance of the slipper-swashplate interface in an axial piston pump, this paper proposes a comprehensive numerical simulation method to predict the ...
Jihai Jiang, Zebo Wang, Geqiang Li
doaj +1 more source
Modeling and Control of a Single Rotor Composed of Two Fixed Wing Airplanes
Drones, 2021 This paper proposes a simple flying rotor prototype composed of two small airplanes attached to each other with a rigid rod so that they can rotate around themselves.
José Antonio Bautista-Medina +2 more
doaj +1 more source
Shock and Vibration, Volume 2022, Issue 1, 2022., 2022 Raising the rotational speed is an effective way to improve the power density of axial piston pump, but high rotational speed tends to cause plunger cavity and valve plate throttling groove cavitation. The cavitation of axial piston pump must reduce its volumetric efficiency and cause vibration and noise.
Sun Zegang +4 more
wiley +1 more source
Engineering Applications of Computational Fluid Mechanics, 2022 An integrated slipper/swashplate structure is developed for seawater hydraulic axial piston pump. Considering the overturning moment of the integrated slipper, the transient hydrodynamic lubrication model of the integrated slipper is established, and the
Ruidong Hong +6 more
doaj +1 more source
Study on the Cavitation Suppression Mechanism of Axial Piston Pump
International Journal of Aerospace Engineering, Volume 2022, Issue 1, 2022., 2022 Gaseous and vaporous cavitation is extremely harmful to axial piston pumps, such as reducing flow rate, increasing flow pulsation, increasing vibration, increasing noise, and shortening life. To suppress the cavitation and improve the performance of axial piston pumps, a mathematical model for suppressing cavitation in the plunger chamber with a ...
Song Yan +3 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
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
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