Results 21 to 30 of about 397,235 (349)
Fault diagnosis method of shearer planetary gear transmission systemunder variable speed conditions
Gong-kuang zidonghua, 2021 When the shearer cuts the coal seam, the planetary gear transmission system of the traction unit is in a variable speed working condition, and the structure of the planetary gear transmission system is complicated.
MAO Qinghua1,2, +5 more
doaj +1 more source
Machines, 2023 Mesh phasing has a dramatic impact on the static and dynamic behaviours of planetary gear systems. This research investigates the coupled phase-tuning mechanism of two-stage planetary gear systems and the corresponding relationship with the coupled ...
Pengfei Yan +4 more
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Contrast analysis between the trajectory of the planetary system and the periodicity of solar activity [PDF]
Annales Geophysicae, 2017 The relationship between the periodic movement of the planetary system and its influence on solar activity is currently a serious topic in research. The kinematic index of the planet juncture index has been developed to find the track and variation of
W. Sun +9 more
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On the sensitivity of extrasolar mass-loss rate ranges: HD 209458b a case study [PDF]
, 2013 We present a 3D hydrodynamic study of the effects that different stellar wind conditions and planetary wind structures have on the calculated Ly-$\alpha$ absorptions produced during the transit of HD 209458b.
Costa, A. +5 more
core +2 more sources
Applied Sciences, 2022 As the foundation and core of various heavy aircraft transmission systems, the reliability level of large-scale aviation planetary mechanism restricts the economic affordability and service safety for the aircraft to a great extent.
Ming Li, Yuan Luo, Liyang Xie
doaj +1 more source
Machines, 2023 Planetary gear systems have many advantages over other gear systems. Previous studies on its dynamic characteristics mostly used Earth as the reference system, which is inconsistent with the actual working conditions of many planetary gear systems, such ...
Bingwei Gao, Yongkang Wang, Guangbin Yu
doaj +1 more source
Conceptual Design of Rover’s Mobility System for Ground-Based Model [PDF]
Journal of Astronomy and Space Sciences, 2009 In recent years, lots of studies on the planetary rover systems have been performed around space advanced agencies such as NASA, ESA, JAXA, etc. Among the various technologies for the planetary rover system, the mobility system, navigation algorithm ...
Youn-Kyu Kim +4 more
doaj +1 more source
The 1:1 resonance in Extrasolar Systems: Migration from planetary to satellite orbits
, 2011 We present families of symmetric and asymmetric periodic orbits at the 1/1 resonance, for a planetary system consisting of a star and two small bodies, in comparison to the star, moving in the same plane under their mutual gravitational attraction.
A. Morbidelli +28 more
core +1 more source
The fragility of planetary systems [PDF]
, 2015 We specify the range to which perturbations penetrate a planetesimal system. Such perturbations can originate from massive planets or from encounters with other stars.
Jilkova, Lucie, Zwart, Simon Portegies
core +3 more sources
Extra-solar planetary systems [PDF]
Proceedings of the National Academy of Sciences, 1999 The discovery of extra-solar planets has captured the imagination and interest of the public and scientific communities alike, and for the same reasons: we are all want to know the answers to questions such as “Where do we come from?” and “Are we alone?” Throughout this century, popular culture has presumed the existence of other worlds and extra ...
J, Najita, W, Benz, A, Hatzes
openaire +2 more sources