Results 1 to 10 of about 199 (110)
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
exaly +3 more sources
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, Senkui Lu, Renliang Chen
exaly +3 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
Lift Enhancement of Tiltrotor Wing Using a Gurney Flap
International Journal of Aerospace Engineering, 2022 A numerical investigation was undertaken to explore the lift-enhancing characteristics of the Gurney flap on a tiltrotor wing. The heights of Gurney flaps range from 1 to 4% wing chord lengths.
Hao Chen, Bo Chen
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
doaj +2 more sources
AerospaceNumerical simulations were conducted to analyze the unsteady aerodynamic characteristics of a tiltrotor aircraft with different conversion strategies.
Xi Chen, Qijun Zhao, Guoqing Zhao
exaly +3 more sources
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
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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
Numerical Simulation of Continuous Tilting Transition of Tiltrotor Aircraft
Hangkong gongcheng jinzhan, 2021 The aerodynamic configuration of the tiltrotor aircraft is constantly changed during the tilting transition process, and the aerodynamic characteristics is of strongly nonlinear characteristics.Aiming at the complex states of continuous tilting ...
WU Weiwei +3 more
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Gait Analysis for a Tiltrotor: The Dynamic Invertible Gait
Robotics, 2022 A conventional feedback-linearization-based controller, when applied to a tiltrotor (eight inputs), results in extensive changes in tilting angles, which are not expected in practice. To solve this problem, we introduce the novel concept of “UAV gait” to
Zhe Shen, Takeshi Tsuchiya
doaj +1 more source