Results 11 to 20 of about 63,574 (265)
Failure Prediction of the Rotating Machinery Based on CEEMDAN-ApEn Feature and AR-UKF Model
Applied Sciences, 2020 A novel failure prediction method of the rotating machinery is presented in this paper. Firstly, the complete ensemble empirical mode decomposition with adaptive noise (CEEMDAN) is applied to decompose the vibration signals of the rotating machinery into
Jingli Yang +3 more
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Combustion Characteristics in Rotating Detonation Engines
International Journal of Aerospace Engineering, 2021 A lot of studies on rotating detonation engines have been carried out due to the higher thermal efficiency. However, the number, rotating directions, and intensities of rotating detonation waves are changeful when the flow rate, equivalence ratio, inflow
Yuhui Wang, Wenyou Qiao, JialingLe
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Nonanalytic Relativistic r-Modes of Slowly Rotating Nonbarotropic Neutron Stars
Universe, 2022 We show that the r-modes of slowly rotating nonbarotropic neutron stars are described by nonanalytic functions of stellar angular velocity, which makes the perturbation techniques, used so far in the r-mode theoretical studies, inapplicable.
Kirill Y. Kraav +2 more
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Rotational Modes in A Uniformly Rotating Star [PDF]
International Astronomical Union Colloquium, 1980 AbstractThe linear adiabatic oscillations of a uniformly rotating star are examined with respect to a co-rotating frame of reference. It is shown that time-independent displacement fields are allowed and can be represented as toroidal fields. The time-dependent oscillation modes are governed by a system of differential equations of the fourth order in ...
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Rotating accelerator-mode islands
Physical Review E, 2007 The existence of rotating accelerator-mode islands (RAIs), performing quasiregular motion in rotational resonances of order $m>1$ of the standard map, is firmly established by an accurate numerical analysis of all the known data. It is found that many accelerator-mode islands for relatively small nonintegrability parameter $K$ are RAIs visiting ...
Barash, Oded, Dana, Itzhack
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Entropy, 2018 It is a difficult task to analyze the coupling characteristics of rotating machinery fault signals under the influence of complex and nonlinear interference signals.
Zhe Wu +4 more
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IEEE Access, 2020 A novel direct torque control (DTC) strategy is proposed to reduce common- mode voltage in matrix converter (MC)- fed permanent magnet synchronous motor (PMSM) system, by way of replacing some of the active vectors in the traditional DTC switching table ...
Weitao Deng, Xin Fu, Wenwu Xie
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IEEE Access, 2021 The rotating vectors of a matrix converter are uniquely featured by producing zero common-mode voltage, and control methods using them have the advantage of inherently achieving common-mode voltage minimization.
Weitao Deng +4 more
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Effects of Reversed Shock Waves on Operation Mode in H2/O2 Rotating Detonation Chambers
Energies, 2021 Operation modes are an important topic in the research of Rotating Detonation Chamber (RDC) as it can affect the stability of RDC. However, they have not been discussed in detail due to the limitation of measurement means in experiments.
Yanliang Chen +2 more
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Journal of Advanced Joining Processes, 2020 A drop transfer mode and a rotating transfer mode in high current gas metal arc welding named buried arc welding were modeled using a particle method that was suitable for numerical simulations of a fluid behavior with phase changes and large ...
Hisaya Komen +5 more
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