Results 11 to 20 of about 171,960 (303)

Low-Frequency Harmonic Perturbations Drive Protein Conformational Changes [PDF]

open access: yesInternational Journal of Molecular Sciences, 2021
Protein dynamics has been investigated since almost half a century, as it is believed to constitute the fundamental connection between structure and function. Elastic network models (ENMs) have been widely used to predict protein dynamics, flexibility and the biological mechanism, from which remarkable results have been found regarding the prediction ...
Scaramozzino D.   +3 more
openaire   +3 more sources

Fracture Analysis of Toughness Fracture Failure on Flexspline of Harmonic Reducers During the Service [PDF]

open access: yesTeshugang
The reasons of the fatigue failure of flexspline are analyzed by observation analysis, observation and hardness determination of fracture morphology of microstructure.
Mu Xiaobiao, Zhang Yongqi, Gao Minyan, Yang Guoqiang, Zhang Chaolei
doaj   +1 more source

Single-shot fluctuations in waveguided high-harmonic generation [PDF]

open access: yes, 2015
For exploring the application potential of coherent soft x-ray (SXR) and extreme ultraviolet radiation (XUV) provided by high-harmonic generation, it is important to characterize the central output parameters.
Bastiaens, H. J. M.   +8 more
core   +3 more sources

Improving the Efficiency of Electric Rolling Stock Operation Through the Use of Adaptive Filtering Methods for High Harmonic Current Components in Traction Drive Systems [PDF]

open access: yesProblems of the Regional Energetics, 2023
The aim of this work is to investigate the efficiency of various adaptive filtering methods for higher harmonic components of stator currents in a vector-controlled traction drive system to improve the operation efficiency of electric rolling stock.
Goolak S.
doaj   +1 more source

Experimental study on the influence of flexible bearing clearance on natural frequency of harmonic reducer

open access: yesJournal of Advanced Mechanical Design, Systems, and Manufacturing, 2022
Harmonic reducer is a transmission device with high transmission ratio and high accuracy, which is widely used in robotics and other instruments. Backlash reflects the positioning accuracy of harmonic drive, which is one of the key performances of ...
Yazhen WANG, Yipeng CHEN
doaj   +1 more source

Transport by bi-harmonic drives: from harmonic to vibrational mixing

open access: yesJournal of Physics: Condensed Matter, 2005
Transport in a one-dimensional symmetric device can be activated by the combination of thermal noise and a bi-harmonic drive. The results of extensive simulations allow us to distinguish between two apparently different bi-harmonic regimes: (i) harmonic mixing, where the two drive frequencies are commensurate but not too high; (ii) vibrational mixing ...
Fabio Marchesoni   +3 more
openaire   +6 more sources

Modeling of Transmission Compliance and Hysteresis Considering Degradation in a Harmonic Drive

open access: yesApplied Sciences, 2021
Transmission compliance and hysteresis behaviors are associated with harmonic drives. The experimental observation of a harmonic drive showed that these behaviors are significantly degraded with increasing service time, and their accurate modeling is ...
Ting Tang   +4 more
doaj   +1 more source

A Refined Dynamic Model of Harmonic Drive and Its Dynamic Response Analysis

open access: yesShock and Vibration, 2020
To highlight the key factors which influence the dynamic performance of the harmonic drive, a refined harmonic drive model considering nonlinear stiffness, kinematic error, and friction of the critical components is established.
Xian Zhang   +4 more
doaj   +1 more source

Temporal response to harmonic driving in electroconvection [PDF]

open access: yesPhysical Review E, 2011
19 pages, 5 ...
Toth-Katona, Tibor   +2 more
openaire   +3 more sources

Sensorless five-phase induction motor drive with third harmonic injection and inverter output filter [PDF]

open access: yesBulletin of the Polish Academy of Sciences: Technical Sciences, 2020
The paper presents a sensorless control approach for a five-phase induction motor drive with third harmonic injection and inverter output filter. In the case of the third harmonic injection being utilised in the control, the physical machine has to be ...
P. Strankowski   +4 more
doaj   +1 more source

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