Results 21 to 30 of about 813,317 (386)
Machines, 2022 The spindle and grinding wheel flange (GWF) adopt double positioning of a tapered surface and end face. Due to the processing quality, the contact state of the spindle–GWF interface cannot be determined accurately.
Qianqian Yuan +3 more
doaj +1 more source
Friction, 2019 To analyze the nonlinear dynamics of a tilting-pad journal bearing (TPJB)-rotor system with high accuracy and speed, the database method (DM) is modified to rapidly determine the nonlinear fluid film force (NFFF) of a TPJB while considering turbulent and
Yingze Jin +3 more
doaj +1 more source
Lubricants, 2023 To study the variation rules of nonlinear stiffness of double-row angular contact ball bearings (DR-ACBB), this paper proposed a general mathematic model for DR-ACBB under three different configurations based on the improved quasi-static model of ball ...
Bin Fang, Jinhua Zhang, Jun Hong, Ke Yan
doaj +1 more source
CPG Motion Control for a Bionic Manta Ray Robot Fish Propelled by Flexible Pectoral Fin
水下无人系统学报, 2023 Considering a manta ray as the bionic object, this paper proposes a design scheme for a bionic manta-ray robot fish with flexible pectoral fin propulsion.
Kaigang NAN +3 more
doaj +1 more source
IEEE Transactions on Vehicular Technology, 2019 This paper investigates the design principles and performance optimization for segmented-rotor switched reluctance motors (SRSRMs) with different rotor pole numbers for belt-driven starter generators of hybrid electric vehicles. For the design principles,
Xiaodong Sun +4 more
semanticscholar +1 more source
A comparison of coaxial and conventional rotor performance [PDF]
, 2009 The performance of a coaxial rotor in hover, in steady forward flight, and in level, coordinated turns is contrasted with that of an equivalent, conventional rotor with the same overall solidity, number of blades, and blade aerodynamic properties.
Brown, Brown, Kim, Landgrebe, Newman
core +1 more source
Revisiting Rotor Rigid Body Modes: Parametric Study of Stability
International Journal of Rotating Machinery, 1999 This paper presents an analytical model of a rigid rotor supported in two fluid film bearings with an emphasis on predicting the instability threshold speed.
Nathan B. Littrell +2 more
doaj +1 more source
Tilting-Pad Journal Bearings—Frequency-Dependent Dynamic Coefficients and Pivot Flexibility Effects
Lubricants, 2022 Tribologists have generally accepted that the dynamic modeling of tilting-pad journal bearings (TPJB) must consider the frequency dependency of the dynamic properties.
Laurence F. Wagner, Paul E. Allaire
doaj +1 more source
IEEE transactions on industry applications, 2019 Rotor eccentricity and local demagnetization in permanent magnet synchronous motors (PMSMs) increase unbalanced magnetic pull and motor vibration resulting in accelerated aging of motor components. If the asymmetry in the rotor remains undetected, it can
Yonghyun Park +8 more
semanticscholar +1 more source
Effects of rotor–rotor interaction on the wake characteristics of twin rotors in axial descent
Journal of Fluid Mechanics, 2022 In this study, the effects of rotor–rotor interaction on wake characteristics were investigated experimentally for a twin-rotor configuration in axial descent. The wake velocities were measured at descent rates (descent speed/induced velocity at the rotor disk during hover) from 0.87 to 1.52, and the rotor–rotor interaction strength was controlled by ...
Seokbong Chae, Seungcheol Lee, Jooha Kim
openaire +2 more sources