Results 21 to 30 of about 188,454 (278)
Application of square-wave inverter in excitation system for magnetic nanoparticle tomography
AIP Advances, 2022 To collect the signals of magnetic nanoparticles (MNPs) at a distance from a magnetic nanoparticle tomography, a strong ac magnetic field should be generated by applying a high current to the excitation coil.
Kohta Higashino +3 more
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Forced-self-excited system of iced transmission lines under planar harmonic excitations [PDF]
Nonlinear Dynamics, 2021 Abstract This paper is concerned with the analysis of the self-excited vibrations and forced vibrations of the iced transmission lines. By introducing the external excitation load, the effect of dynamic wind on the nonlinear vibration equations of motion is reflected by vertical aerodynamic force. The approximate analytical solution of the non-
Xiaohui Liu +7 more
openaire +1 more source
Fast shuttling of a trapped ion in the presence of noise [PDF]
, 2014 We theoretically investigate the motional excitation of a single ion caused by spring-constant and position uctuations of a harmonic trap during trap shuttling processes.
Chen, Xi +5 more
core +2 more sources
INTERPRETATION OF VIBRATION SIGNALS OF COMPLEX ROTOR SYSTEM BASED ON FRACTAL ANALYSIS
Авіаційно-космічна техніка та технологія, 2019 The work analyzes vibration signals obtained by simulating a turbine of a complex rotor system, for example, an aviation gas turbine engine, under conditions of stationary and non-stationary excitations. Four modes of vibration excitation are considered:
Надія Іванівна Бурау +1 more
doaj +1 more source
Dynamic Analysis of Percussion Drilling System under Harmonic Impact
Shock and Vibration, 2021 As a new efficient rock-breaking technology, harmonic impact drilling technology has received great attention, but the research on its rock-breaking mechanism is insufficient, which limits its development.
Yijin Zeng +4 more
doaj +1 more source
Study on the effect of different pre-excitation factors on the output characteristics of MCSR
Energy Reports, 2022 This paper takes the BKFSZT-30000/400 three-phase eight-limb magnetically controlled shunt reactor as the research object. Firstly, an electromagnetic transient simulation model is established based on the parity principle to verify the operating ...
Junqiang Xing +4 more
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Fault-Tolerant Operation of Wound Field Synchronous Machine Using Coil Switching
IEEE Access, 2019 This paper proposes a fault tolerant operation of a wound field synchronous machine (WFSM) under the loss of excitation (LOE) fault in the rotor field winding. A two-mode field excitation scheme is presented, where the rotor of the WFSM was modified, and
Muhammad Ayub +3 more
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Sudden excitations of harmonic normal modes
Journal of Mathematical Chemistry, 2022 AbstractThe N-harmonium boson system, i.e., a completely integrable model of N particles where both the external confinement and the two-particle interaction are harmonic, is investigated under the action of sudden time-dependent perturbation. This quench-like external perturbation of confinement has a quadrupolar space-character.
I. Aldazabal, I. Nagy
openaire +3 more sources
Mathematics, 2022 The online frequency estimation of forced harmonic vibrations on a building-like structure, using a nonlinear flexible vibration absorber in a cantilever beam configuration, is addressed in this article.
Francisco Beltran-Carbajal +5 more
doaj +1 more source
Optimal trajectories for efficient atomic transport without final excitation [PDF]
, 2011 We design optimal harmonic-trap trajectories to transport cold atoms without final excitation, combining an inverse engineering techniqe based on Lewis-Riesenfeld invariants with optimal control theory. Since actual traps are not really harmonic, we keep
Chen, Xi +4 more
core +2 more sources