Tiltrotor CFD part II: aerodynamic optimisation of tiltrotor blades [PDF]
The Aeronautical Journal, 2017 This paper presents aerodynamic optimisation of tiltrotor blades with high-fidelity computational fluid dynamics. The employed optimisation framework is based on a quasi-Newton method, and the required high-fidelity flow gradients were computed using a
Barakos, G.N. +5 more
core +2 more sources
Tiltrotor CFD part I: validation [PDF]
The Aeronautical Journal, 2017 This paper presents performance analyses of the model-scale ERICA and TILTAERO tiltrotors and of the full-scale XV-15 rotor with high-fidelity computational fluids dynamics.
Barakos, George N. +2 more
core +3 more sources
Aerodynamic Uncertainty Quantification for Tiltrotor Aircraft [PDF]
Aerospace, 2022 The tiltrotor has unique flight dynamics due to the aerodynamic interference characteristics. Multiple aerodynamics calculation approaches, such as the CFD method, are utilised to characterise this feature.
Ye Yuan, Douglas Thomson, David Anderson
doaj +4 more sources
Unified Accurate Attitude Control for Dual-Tiltrotor UAV with Cyclic Pitch Using Actuator Dynamics Compensated LADRC [PDF]
Sensors, 2022 This paper proposes a unified attitude controller based on the modified linear active disturbance rejection control (LADRC) for a dual-tiltrotor unmanned aerial vehicle (UAV) with cyclic pitch to achieve accurate attitude control despite its nonlinear ...
Zexin Wang +5 more
doaj +2 more sources
Numerical simulation of the transition flight aerodynamics of cross-shaped quad-tiltrotor UAV [PDF]
Scientific ReportsIn order to enhance the stability of the tilt transition process, a new configuration of Quad-Tiltrotor UAV was presented in this paper. Firstly, numerical simulation was used to calculate and analyze the aerodynamic interaction between the front rotor ...
Siliang Du, Yi Zha
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Tiltrotor Crashworthiness Approaches [PDF]
Aerotecnica Missili & Spazio, 2021 The presentation outlines the results of numerical activities related to crashworthiness approaches followed in DEFENDER and T-WING projects, funded by Clean Sky2 in the framework of EU Horizon2020 program.
Di Palma, , Di Caprio, , Belardo
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Nonlinear modeling and transition corridor calculation of a tiltrotor without cyclic pitch [PDF]
MATEC Web of Conferences, 2022 In order to solve the problem of rotor airflow interference to the wing of tiltrotor UAV, the lift and drag in the slipstream area and the free flow area were calculated respectively according to the hydrodynamics theory and CFD simulation.
Fan Yourong +3 more
doaj +1 more source
Mathematical Modeling and Stability Analysis of Tiltrotor Aircraft
Drones, 2022 The key problem in the development process of a tiltrotor is its mathematical modeling. Regarding that, this paper proposes a dividing modeling method which divides a tiltrotor into five parts (rotor, wing, fuselage, horizontal tail, and vertical fin ...
Hanlin Sheng, Chen Zhang, Yulong Xiang
doaj +1 more source
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
doaj +1 more source
Optimization of the trimming tilting angle of the electric tiltrotor propeller group
Научный вестник МГТУ ГА, 2021 The paper examined the possibility of improving the energy efficient performance of an electric tiltrotor with a lift-propulsion propeller group for a steady flight mode by reducing the energy consumption of the propeller group per unit of time or per ...
V. I. Busurin, P. V. Mulin
doaj +1 more source