Results 11 to 20 of about 16,873 (217)
Multidisciplinary Optimisation Framework for Minimum Rotorcraft Fuel and Air Pollutants at Mission Level [PDF]
, 2013 Helicopters play a unique role in modern aviation providing a varied range of benefits to society and satisfying the need for fast mobility. However, environmental concerns associated with the operation of rotorcraft have increased due to envisaged ...
Smith, Howard +2 more
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Advances in Mechanical Engineering, 2022 In order to avoid the hard landing on the uneven ground, several robotic landing gears of the rotorcraft are designed. In previous studies, most literature focuses on the control methods of the robotic landing gears.
Lianquan Wu, Yongling Liang, Qi Li
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Micromachines, 2021 Active rotor with trailing-edge flaps is a promising method to alleviate vibrations and noise level of helicopters. Hysteresis of the piezoelectric actuators used to drive the flaps can degrade the performance of an active rotor. In this study, bench-top
Jinlong Zhou, Linghua Dong, Weidong Yang
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Compound-Split Drivetrains For Rotorcraft [PDF]
, 2017 The investigation presented in this paper is part of the international research project VARI-SPEED with the aim to invent a speed-variable drivetrain for different rotorcraft configurations to reduce the required propulsion power, which enables a modern ...
Hartentahler, Katharina +3 more
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Study on the Selection Method of Power Unit for Manned Multi-rotor Aircraft
Hangkong gongcheng jinzhan, 2021 The manned multi-rotor aircraft has the characteristics of large structural size, large load demand, and variable size and variable number of available rotors.The rapid determination of the power unit of this type of aircraft is of strong engineering ...
CHEN Sijing +4 more
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Generalized Quantitative Stability Analysis of Time-Dependent Comprehensive Rotorcraft Systems
Aerospace, 2021 Rotorcraft stability is an inherently multidisciplinary area, including aerodynamics of rotor and fuselage, structural dynamics of flexible structures, actuator dynamics, control, and stability augmentation systems.
Aykut Tamer, Pierangelo Masarati
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Fuzzy Neural Network PID Control Used in Individual Blade Control
Aerospace, 2023 In order to further reduce the vibration level of helicopters, the active vibration control technology of helicopters has been extensively studied. Among them, individual blade control (IBC) independently applies high-order harmonics to each blade with ...
Renguo Yang +3 more
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Development of Advanced Ceramic Materials for Rotorcraft [PDF]
中国工程科学Advanced ceramic materials are the foundation for the safe operation of hot-end components and dynamic energy impact protection components of rotorcraft, as well as an important material basis for the electrification and intelligent development of ...
Guangchang Chen +17 more
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Aerospace, 2023 This study develops a hybrid solver with reversed overset assembly technology (ROAT), a viscous vortex particle method (VVPM), and a CFD program based on the URNS method, in order to study the aerodynamic and acoustic characteristics of coaxial rigid ...
Yucheng Yang +3 more
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Analysis of Rotor/Propeller/Fuselage Interaction Characteristics of High-speed Helicopter
Hangkong gongcheng jinzhan, 2020 The study on aerodynamic characteristics of high-speed helicopter with double-thrust-propeller can provide the reference for the design and aerodynamic optimization of high-speed helicopter.
SHEN Suiyuan +4 more
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