Results 11 to 20 of about 19,013 (214)
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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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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Aerospace, 2022 Due to the small tilt angle, a tiltrotor operates in non-axial flow conditions during shipboard take-off and landing. The non-uniformity of the blade’s air-load is high, resulting in structural deformation with high fluctuation frequency, affecting the ...
Peng Yu +3 more
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Particularities of Rotorcraft in Dealing with Advanced Controllers [PDF]
INCAS BulletinAdvanced nonlinear controllers are a desirable solution to rotorcraft flight control as they can solve the system high nonlinear dynamic behavior. However, conventional nonlinear controllers such as Nonlinear Dynamic Inversion (NDI) controller heavily ...
Marilena D. PAVEL
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Geometry Design of Coaxial Rigid Rotor in High-Speed Forward Flight
International Journal of Aerospace Engineering, 2020 The aerodynamic performance analysis and blade planform design of a coaxial rigid rotor in forward flight were carried out utilizing CFD solver CLORNS. Firstly, the forward flow field characteristics of the coaxial rotor were analyzed.
Bo Wang +3 more
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Conversion Flight Control for Tiltrotor Aircraft via Active Disturbance Rejection Control
Aerospace, 2022 The tiltrotor aircraft consists of three primary flight modes, which are helicopter flight mode in low forward speed flight, airplane flight mode in high forward speed flight and conversion flight mode. This paper presents an active disturbance rejection
Ke Lu +4 more
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Numerical Research on the Layout for Wing-Deflectable Hydrofoil Seaplane
Hangkong gongcheng jinzhan, 2019 Aiming at the problem of big drag during takeoff for seaplane, a hydrofoil seaplane with deflectable wings is proposed. The hydrodynamic lift generated by deflectable wing cutting the water surface during takeoff is big enough to lift the aircraft off ...
Shen Suiyuan +4 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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