Results 41 to 50 of about 2,722 (144)
AIP Advances, 2019 The known publications of the gyroscope property of maintaining its axis are represented by simplified mathematical models formulated on the law of kinetic energy conservation and the action of an inertial torque expressed by the change in the angular ...
R. Usubamatov
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Nutation and the Oppolzer's Terms [PDF]
Symposium - International Astronomical Union, 1980 Two fundamental frames of reference are used in the study of the rotation of the Earth: the nonrotating celestial coordinate system XYZ attached to the directions to stars and/or extragalactic sources, and the terrestrial coordinate system xyz attached in “a prescribed way” to several points (observatories) on the surface of the Earth or to the pencil ...
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Jixie chuandong, 2020 The derivation process of the tooth surface mathematical model of the internal meshing spiral bevel gears for nutation drive is complex. In order to establish different tooth profiles of the spiral bevel gears and carry out load contact analysis， the ...
Zheng Lin, Ligang Yao
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Precession-Nutations and Tidal Potential [PDF]
International Astronomical Union Colloquium, 1971 We have previously established (Melchior and Georis, 1968) the equations connecting the development of precession-nutation with the tesseral part of the tidal potential. These equations are:whereωiAirespectively represent the frequencies and amplitudes of the tidal waves, ω the Earth’s rotation velocity,
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Jixie chuandong, 2021 The contact characteristics of a nutation drive with double circular-arc spiral bevel gears are extremely sensitive to installation errors. To reveal the effects of installation errors on contact characteristics，the tooth surface contact analysis of ...
Qin Chen +4 more
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Adaptive Single-Mode Fiber Coupling Method Based on Coarse-Fine Laser Nutation
IEEE Photonics Journal, 2018 One of the major restrictions of the free-space optical communication systems is the limitation of single-mode fiber (SMF) coupling efficiency that impacts the system performance.
Bo Li +4 more
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Mass asymmetry and tricyclic wobble motion assessment using automated launch video analysis
Defence Technology, 2016 This paper describes an approach to identify epicyclic and tricyclic motion during projectile flight caused by mass asymmetries in spin-stabilized projectiles.
Ryan Decker +4 more
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Quadrupole Nutation NMR in Solids
Zeitschrift für Naturforschung A, 1992 Abstract The nutation frequency of a quadrupolar spin I depends on the quadrupole interaction. From nutation spectra, therefore, one obtains information about the direct surrounding of the atom. The theory of the straightforward and of more complicated nutation NMR experiments is outlined.
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Structure Design and Magnetic Field Simulation of Non-contact Nutation Reduction Motor
Jixie chuandong, 2019 In order to solve the problem of weak stiffness of flexible wheels and more mechanical friction in existing robot harmonic reducer motors, a new type of nutation reducer motor is proposed by combining nutation deceleration motion with magnetic meshing ...
Xiaqi Shan +3 more
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Вестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, 2016 The problem of stabilizing the motion of small spacecraft relative to the center of mass in the process of deploying an orbital tether system is presented in the paper.
Yu. M. Zabolotnov, A. A. Lobankov
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