Results 21 to 30 of about 16,873 (217)
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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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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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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Model predictive control architecture for rotorcraft inverse simulation [PDF]
, 2013 A novel inverse simulation scheme is proposed for applications to rotorcraft dynamic models. The algorithm adopts an architecture that closely resembles that of a model predictive control scheme, where the controlled plant is represented by a high-order ...
AVANZINI, Giulio +5 more
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Investigation of mixed element hybrid grid-based CFD methods for rotorcraft flow analysis [PDF]
, 2010 Accurate first-principles flow prediction is essential to the design and development of rotorcraft, and while current numerical analysis tools can, in theory, model the complete flow field, in practice the accuracy of these tools is limited by various ...
Smith, Marlyn J. +4 more
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Research on control strategy of four rotorcraft tracking ground moving target
Dianzi Jishu Yingyong, 2018 In order to enable the four rotorcraft to track the ground moving target, the spatial position control strategy of four rotorcraft is studied. Firstly, the attitude PID control of the four rotorcraft is improved and the appropriate parameters are set ...
Huang Ruimin +4 more
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An Experimental Study on Rotor Aerodynamic Noise Control Based on Active Flap Control
Aerospace, 2023 Reducing rotor aerodynamic noise is an important challenge in helicopter design. Active flap control (AFC) on rotors is an effective noise reduction method.
Zhiyuan Hu +3 more
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Low Reynolds Number Rotor Blade Aerodynamic Analysis
MATEC Web of Conferences, 2019 Maintaining a steady hover flight in a rotorcraft usually requires high energy input. The aim of the paper is to prove that it is possible to vastly reduce energy use in a rotorcraft by reducing the disc loading.
Tulwin Tytus
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