Results 81 to 90 of about 1,923 (205)

Electrostatic Charging of Lunar Cavities Governed by the Flow‐to‐Thermal Speed Ratio: 3D PIC Simulations and a Free‐Fall Model

Journal of Geophysical Research: Space Physics, Volume 130, Issue 10, October 2025.
Abstract We use Particle‐In‐Cell (PIC) simulations to investigate the charging characteristics inside deep cavities on the lunar surface under the solar wind plasma conditions. Specifically, we systematically study the dependence of the cavity bottom potential on plasma flow velocity and cavity aspect ratio.
J. Nakazono, Y. Miyake, W. J. Miloch
wiley   +1 more source

Theoretical Study on Meshing Stiffness of Cycloid-pin Gear Drive based on Energy Method

Jixie chuandong, 2018
Based on energy method and Hertz contact theory,a calculation model of mesh stiffness of the cycloid-pin gear pair is proposed with considering the bending,shearing and compression deformation of the cycloid gear tooth as well as the bending,shearing ...
Yang Yun, Li Chaoyang, Li Xuan
doaj  

The Importance of Pickup H+ Escape at Mars

Geophysical Research Letters, Volume 52, Issue 18, 28 September 2025.
Abstract The loss of hydrogen ions on Mars to space largely occurs through the interaction of solar wind with planetary atmosphere. However, the relative importance of different ion escape channels is not yet fully understood. In addition, there are still open questions about the proportion of H+ ${\mathrm{H}}^{+}$ escape in relation to total hydrogen ...
Qi Xu, Lianghai Xie, Lei Li, Yiteng Zhang, Limin Wang, Fuhao Qiao, Yongyong Feng, Linggao Kong   +7 more
wiley   +1 more source

Explores for the source of the gears in traditional Japanese clock (Wadokei)

Nihon Kikai Gakkai ronbunshu, 2017
The purpose of this study is to understand the nature of one of the oldest gears used in traditional Japanese clock. Today's gear manufacturing technology in Japan came mostly from Europe and America, but we do not know exactly, when and how the ...
Akio UEDA, Jun WATANABE, Miyako MIYAZAKI, Aizoh KUBO, Hiroaki MATSUOKA   +4 more
doaj   +1 more source

Meshing Characteristic Analysis of CBR Reducer Considering Tooth Modification and Manufacturing Error

Machines
The China Bearing Reducer (CBR) is a single-stage cycloid reducer with a compact structure, primarily used in high-precision fields such as robotic joints and Computer Numerical Control (CNC) machine tool turntables, where strict requirements for ...
Xiaoxiao Sun, Zhihao Qian, Yaochen Xu, Jiacai Huang   +3 more
doaj   +1 more source

Analysis on Dynamic Transmission Accuracy for RV Reducer

MATEC Web of Conferences, 2017
By taking rotate vector (RV) reducer as the research object, the factors affecting the transmission accuracy are studied, including the machining errors of the main parts, assembly errors, clearance, micro-displacement, gear mesh stiffness and damping ...
Zhang Fengshou, Li Pengfei, Zhu Peng, Yang Xingxing, Jiang Wenhe   +4 more
doaj   +1 more source

Resonant Elastic Soft X-Ray Scattering

, 2012
Resonant (elastic) soft x-ray scattering (RSXS) offers a unique element, site, and valence specific probe to study spatial modulations of charge, spin, and orbital degrees of freedom in solids on the nanoscopic length scale.
Fink, J., Geck, J., Schierle, E., Weschke, E.   +3 more
core   +1 more source

Theoretical and Experimental Study for An Improved Cycloid Drive Model

Journal of Applied Mechanics, 2019
AbstractThis paper describes an experimental and theoretical approach to evaluate cycloid drive reducer efficiency. The tests are carried out on 7.5 kW two-disc cycloid drive with a gear ratio of 19. The torque and speed are measured on the input and output shaft. The efficiency is calculated based on the obtained results.
Dion, Jean-Luc, Pawelski, Zbigniew, Chianca, Vittorio, Zdziennicki, Zbigniew, Peyret, Nicolas, Uszpolewicz, Grzegorz, Ormezowski, Janusz, Mitukiewicz, Grzegorz, Lelasseux, Xavier   +8 more
openaire   +2 more sources

Investigation and Compensation of Hysteresis in Robot Joints with Cycloidal Drives

, 2023
AbstractImproving the dynamic path accuracy has been a major research topic in industrial robotics for decades. It is known that the drivetrains installed in the robot joints limit further improvements. There is a lot more literature on the dynamic behavior of harmonic drives (HDs) than for cycloidal drives (CDs), that are usually installed in ...
Patrick Mesmer, Patrick Riedel, Armin Lechler, Alexander Verl   +3 more
openaire   +1 more source

A Novel Cycloid Tooth Profile for Harmonic Drive with Fully Conjugate Features

Actuators
A harmonic drive (HD) is a precision reduction device widely utilized in the core joints of high-end equipment such as spacecraft and robots. The design of an excellent tooth profile is the core challenge related to the performance of HD.
Yunpeng Yao, Longsheng Lu, Xiaoxia Chen, Yingxi Xie, Yuankai Yang, Jingzhong Xing   +5 more
doaj   +1 more source