Results 1 to 10 of about 7,181 (136)
Sensors, 2023 Brushless synchronous machines (BSMs) are replacing conventional synchronous machines with static excitation in generation facilities due to the absence of sparking and lower maintenance.
Miguel A. Pardo-Vicente +3 more
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The computational fluid dynamic modeling of downwash flow field for a six-rotor UAV [PDF]
Frontiers of Agricultural Science and Engineering, 2018 The downwash flow field of the multi-rotor unmanned aerial vehicle (UAV), formed by propellers during operation, has a significant influence on the deposition, drift and distribution of droplets as well as the spray width of the UAV for plant protection.
Yongjun ZHENG, Shenghui YANG, Xingxing LIU, Jie WANG, Tomas NORTON, Jian CHEN, Yu TAN
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Micro-Vibration Analysis, Suppression, and Isolation of Spacecraft Flywheel Rotor Systems: A Review
VibrationIn this paper, the main excitation sources of micro vibration of spacecraft flywheel rotor systems (SFRSs) are briefly described, and then the research progress is systematically reviewed from four perspectives, including modeling methods, suppression ...
Qinkai Han, Shuai Gao, Fulei Chu
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Movement Models to Predict Low‐Altitude Flight of Soaring Birds Using Look‐Ahead Environmental Factors [PDF]
Ecology and EvolutionAdvances in fine‐scale movement modeling of soaring birds can aid efforts to understand and resolve the impacts of anthropogenic activities on such birds. Soaring birds often rely on underlying terrain and low‐altitude updrafts to govern their flights at
Rimple Sandhu +9 more
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Influencing Factors on the Fluting in an Axial Ball Bearing at DC Bearing Currents
Lubricants, 2023 The effect of variable DC bearing current amplitude, bearing current polarity, mechanical force, rotation speed, bearing temperature, and number of the balls on the fluting in an axial ball bearing type 51208 is investigated under DC currents.
Omid Safdarzadeh +4 more
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Alexandria Engineering Journal, 2023 Small-scale horizontal axis wind turbines (SSHAWT) have recently gained more interest due to fuel shortages and environmental issues. Generally, they are installed close to the ground in the wind boundary layer, where the velocity is relatively small ...
Mahmoud E. Hasan +3 more
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Determination of meridian position by a two-step ground gyrocompass in eesthetical rotor positioning
MECHANICS OF GYROSCOPIC SYSTEMS, 2021 Contradiction between accuracy and time of definition of a plane of a geographical meridian has significantly weakened with appearance of automatic gyrocompasses and algorithmic methods of processing of the information from them.
V. Fedorov, V. Kikot, N. Shtefan
semanticscholar +1 more source
Design, Modeling and Control of a Quadruped Robot SPIDAR: Spherically Vectorable and Distributed Rotors Assisted Air-Ground Amphibious Quadruped Robot [PDF]
arXiv.org, 2023 Multimodal locomotion capability is an emerging topic in robotics field, and various novel mobile robots have been developed to enable the maneuvering in both terrestrial and aerial domains.
Moju Zhao, T. Anzai, Takuzumi Nishio
semanticscholar +1 more source
Modelling of Stator Coil–To–Ground Faults in Induction Motor
The Renewable Energies and Power Quality Journal (RE&PQJ), 2021 Three–phase squirrel cage induction motors are the most widespread types of electrical motors which can be found in both industrial and tertiary applications.
S. Kocman, P. Pečínka
semanticscholar +1 more source
IEEE Access, 2022 We live in an electrified atmosphere where a potential difference of about 250 kV is established between the ground and the ionosphere. The resulting potential gradient induces electric charges on the objects immersed in the atmosphere, which are more ...
Pol Fontanes +5 more
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