Results 121 to 130 of about 33,641 (337)
Identification and proposed control of helicopter transmission noise at the source [PDF]
Helicopter cabin interiors require noise treatment which is expensive and adds weight. The gears inside the main power transmission are major sources of cabin noise.
Coy, John J. +6 more
core +2 more sources
Hydraulic In Vitro Characterization of MR‐Conditional Blood Pumps
Artificial Organs, EarlyView.Cardiac surgery in neonates requires close placement of cardiopulmonary bypass machines due to limited blood volume, complicating MR compatibility. This study introduces three MR‐conditional blood pump prototypes. None interfered with MRI imaging, though RF‐related sensor effects remain untested.
Dominik T. Schulte +6 more
wiley +1 more source
Battery powered high efficiency drive systems in practical applications [PDF]
, 2015 Since about 30 years three-phase variable speed drives are the standard industrial solution when high reliability, high ingress protection of machine and especially high efficiency are required.
Weiss, H.
core
Annals of Public and Cooperative Economics, EarlyView.Abstract The United Nations defined the Sustainable Development Goals (SDGs) in 2015. As a result, an increasing number of companies have integrated sustainable development practices into their activities with the aim of contributing to the SDGs achievement.
Joan R. Sanchis +2 more
wiley +1 more source
Planetary Gearbox Fault Detection Using Vibration Separation Techniques [PDF]
Studies were performed to demonstrate the capability to detect planetary gear and bearing faults in helicopter main-rotor transmissions. The work supported the Operations Support and Sustainment (OSST) program with the U.S.
Ehinger, Ryan T. +3 more
core +1 more source
CALCULATION FOR THE STRENGTH OF GEAR WHEELS OF PLANETARY ROWS
, 2021 Gulchekhra Zhuraeva, Alisher Avazniyozov
openalex +1 more source
Business Ethics, the Environment &Responsibility, EarlyView.ABSTRACT This study investigates the impact of environmental attention on cryptocurrency market volatility by introducing the Crypto Environmental Attention Index (CEAI), a new metric inspired by Wang et al. (2022) and constructed using daily web search data.
Ines Ghazouani +2 more
wiley +1 more source
Jixie chuandongA study on the load characteristics of the modified gear planetary gear systems is conducted to address the issue of uneven loads between planetary gears due to manufacturing and installation errors, which result in deviations between the radial and ...
Xu Pengpeng, Chen Lifeng, Zhao Yingjun
doaj
Jixie chuandong, 2016 Taking the compound planetary gear train as research object,a nonlinear translation- torsion coupled dynamics model is established for compound planetary gear train considering the time- varying meshing stiffness,gear backlash and synthetic meshing ...
Zhou Lu +4 more
doaj
Gear tooth stress measurements on the UH-60A helicopter transmission [PDF]
The U.S. Army UH-60A (Black Hawk) 2200-kW (3000-hp) class twin-engine helicopter transmission was tested at the NASA Lewis Research Center. Results from these experimental (strain-gage) stress tests will enhance the data base for gear stress levels in ...
Oswald, Fred B.
core +1 more source