Results 31 to 40 of about 191,773 (209)
Grinding Characteristics of MoS2-Coated Brazed CBN Grinding Wheels in Dry Grinding of Titanium Alloy
Chinese Journal of Mechanical Engineering, 2023 As an important green manufacturing process, dry grinding has problems such as high grinding temperature and insufficient cooling capacity. Aiming at the problems of sticking and burns in dry grinding of titanium alloys, grinding performance evaluation ...
Junshuai Zhao +6 more
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Machines, 2023 Research on helicopter transient maneuvering flight noise is a hotspot and challenging topic in the fields of helicopter design and application. A new time-accurate free-wake (TAFW) method and the Fowcs Williams-Hawkings (FW–H) equations are applied to ...
Zhiyuan Hu +3 more
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AerospaceThe tail boom is a critical structural component of a helicopter, and accurately capturing its dynamic characteristics is essential; however, the inherent geometric and material complexity of the tail boom usually leads to large-scale finite element ...
Kunjian Jin +5 more
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Computational fluid dynamics model of a quad-rotor helicopter for dynamic analysis [PDF]
, 2016 The control and performance of a quad-rotor helicopter UAV is greatly influenced by its aerodynamics, which in turn is affected by the interactions with features in its remote environment. This paper presents details of Computational Fluid Dynamics (CFD)
Bousbaine, Amar +2 more
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Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine, 2023 Introduction A broad range of pathophysiologic conditions can lead to cardiopulmonary arrest in children. Some of these children suffer from refractory cardiac arrest, not responding to basic and advanced life support.
Lars Mommers +5 more
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International Journal of Aerospace EngineeringActive control of structural response is the most practical and effective approach to mitigate helicopter vibration and enhance ride quality. In this paper, adaptive feedforward vibration control is constructed for the helicopter cabin floor driven by ...
Laishou Song, Yingquan Wang, Xiaoyu Shen
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Research on Whirl‑Flutter Characteristics of Distributed Propulsive Rotorcraft
Nanjing Hangkong Hangtian Daxue XuebaoAiming at the problem of whirl-flutter dynamics of distributed propulsion rotorcraft in high-speed forward flight state， this paper proposes a highly versatile， fast and efficient distributed multi-rotor/tilt-wing coupled aeroelastic dynamics analysis ...
CHENG Yi +3 more
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THE EFFECT OF DIFFERENT OPTIONS OF BLADES MAIN ROTOR ON THE X-SHAPED TAIL ROTOR OF THE MI-171 LL
Научный вестник МГТУ ГА, 2018 This paper describes the effect of different rotor blades on the X-shaped tail rotor of the Mi-171 LL, observed conducting flight tests. The tests were carried out on the same helicopter in the similar atmospheric conditions.The objective of the tests ...
V. A. Ivchin +2 more
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Design of Swarm Intelligence Control Based on Double-Layer Deep Reinforcement Learning
Applied SciencesTraditional methods have limitations regarding efficient collaboration and dynamic response in complex dynamic environments. Although existing swarm intelligence control methods possess certain adaptive optimization capabilities, they still face ...
Xiangpei Yan +4 more
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Analytical and Experimental Study of Key Performance of Helicopter Rotor Torsion–Tension Straps
ActuatorsAs a crucial component of rotor systems, tension and torsion (TT) straps, recognized for their compact structure, have been adopted in advanced helicopters such as the SB > 1, EC145, and Mi-26.
Yamin Wang, Ruchuan Zhou, Wenjun Huang
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