Results 51 to 60 of about 1,986 (195)

CFD Simulations of Tiltrotor Configurations in Hover [PDF]

Journal of the American Helicopter Society, 2005
Navier-Stokes computational fluid dynamics calculations are presented for isolated, half-span, and full-span V-22 tiltrotor hover configurations. These computational results extend the validity of CFD hover methodology beyond conventional rotorcraft applications to tiltrotor configurations.
Mark A. Potsdam, Roger C. Strawn
openaire   +1 more source

The key technologies of tiltrotor pylon conversion actuator

Hangkong gongcheng jinzhan
Tiltrotor which combines the advantages of helicopters and fixed wing aircraft，is a key direction for future aviation equipment development. The key component of tiltrotor-pylon conversion actuator is focused.
LI Hailin, SI Jun, DANG Kexin, ZHANG Wei, LIU Longfei, WANG Xudong   +5 more
doaj   +1 more source

Tilting rotor aerodynamic performance prediction based on vortex particle method coupled with large eddy simulation [PDF]

AIP Advances
Tiltrotors are crucial in a low-altitude economy, combining the advantages of fixed-wing aircraft and rotorcraft. However, traditional numerical simulation methods are not accurate enough when simulating the transition state of a tiltrotor, especially ...
Yaolong Liu, Xue Chen, Jiechao Zhang, Xuanyu Yao, Yunkun Man, Yao Zheng   +5 more
doaj   +1 more source

PairTilt: Design and Control of an Active Tilt‐Rotor Quadcopter for Improved Efficiency and Agility

Advanced Intelligent Systems, Volume 7, Issue 7, July 2025.
PairTilt is an actuated tilt‐rotor unmanned aerial vehicle capable of active shape reconfiguration, balancing simplicity, efficiency, and agility. Its H‐shaped frame incorporates pairwise tiltable rotors, which reduce gyroscopic torque and decouple key dynamics, enhancing maneuverability and reducing drag.
Jerry Tang, Mark W. Mueller
wiley   +1 more source

Training Sample Pattern Optimization Based on a Swarm Intelligence Algorithm for Tiltrotor Flight Dynamics Model Approximation

Aerospace, 2023
Neural networks have been widely used as compensational models for aircraft control designs and as surrogate models for other optimizations. In the case of tiltrotor aircraft, the total number of aircraft states and controls is much greater than that of ...
Jiayu Wen, Yanguo Song, Huanjin Wang, Dong Han, Changfa Yang   +4 more
doaj   +1 more source

A Review of Modeling and Control Techniques for Unmanned Aerial Vehicles

Engineering Reports, Volume 7, Issue 6, June 2025.
By systematically classifying UAV modeling techniques and comparing control methods, this paper addresses a notable gap in the current literature. Furthermore, it highlights emerging trends and challenges in UAV control systems, providing valuable insights to guide future research toward enhancing the stability, efficiency, and adaptability of ...
Elisabeth Andarge Gedefaw, Nardos Belay Abera, Chala Merga Abdissa   +2 more
wiley   +1 more source

Interactional Aerodynamics Analysis of a Multirotor Energy Kite

Wind Energy, Volume 28, Issue 1, January 2025.
ABSTRACT Airborne wind energy (AWE) technology aspires to provide increased options for wind energy harvesting at a lower cost than conventional turbines. As AWE technology is still in its infancy, there is relatively little published information concerning its aerodynamic details.
Judd Mehr, Eduardo J. Alvarez, Andrew Ning   +2 more
wiley   +1 more source

Residual based tilt tri‐rotor UAV actuator fault detection using TSK fuzzy model

IET Control Theory &Applications, Volume 19, Issue 1, January/December 2025.
This article proposes a residual‐based fault detection algorithm to address actuator failures in tilt tri‐rotor UAVs. Using the TSK fuzzy model and kernel principal component analysis (KPCA) for enhanced accuracy, the method is validated through simulations and real flight data, achieving high accuracy and real‐time performance with a response time of ...
Guang He, Yi Bao, Liang Xin, Zhiqiang Long   +3 more
wiley   +1 more source

Fuel Weight Fraction Estimation for a Disk–Rotor Hybrid Aircraft Along an Optimal Flight Trajectory During Concept Design

International Journal of Aerospace Engineering, Volume 2025, Issue 1, 2025.
Owing to the transition flight of rotor/wing hybrid vertical take‐off and landing (VTOL) aircraft, the fuel weight cannot be estimated from empirical data during the conceptual design phase. This paper proposes a method for estimating the minimal fuel weight fraction (FWF) through a strategy of trajectory optimization under a given flight profile.
Menglin Yang, Zhiqiang Wan, De Yan, Jingwei Chen, Jinchao Chen   +4 more
wiley   +1 more source

Keen Investigation of the Electromagnetic Scattering Characteristics of Tiltrotor Aircraft Based on Dynamic Calculation Method

Photonics, 2021
To study the radar characteristics of the tiltrotor aircraft when considering rotor rotation and tilting actions, a dynamic calculation method (DCM) based on physical optics and physical theory of diffraction is presented. The results show that the radar
Zeyang Zhou, Jun Huang, Chen Chen, Jiaren Zhang   +3 more
doaj   +1 more source