Results 51 to 60 of about 1,267 (185)
Engineering Reports, Volume 8, Issue 2, February 2026.This comprehensive study advances delamination analysis in composites through innovative computational methods, experimental validation techniques, and predictive algorithms, collectively enhancing damage progression prediction and structural health monitoring for improved integrity in high‐performance applications.
Dhivya Elumalai +4 more
wiley +1 more source
Journal of Marine Science and EngineeringThe oceanic wind and waves, as well as the resultant ship motions, significantly impact the ship airwake and the operation of shipborne helicopters. A numerical method coupling wind, wave, ship and helicopter is developed using multiphase flow, in which ...
Kun Zong +4 more
doaj +1 more source
One‐Dimensional Finite Elements With Arbitrary Cross‐Sectional Displacement Fields
International Journal for Numerical Methods in Engineering, Volume 127, Issue 1, 15 January 2026.ABSTRACT This paper introduces an unprecedented unified approach for developing structural theories with an arbitrary kinematic variable over the beam cross‐section. Each of the three displacement variables can be analyzed using an independent expansion function. Both the order of the expansion and the number of terms in each field can be any. That is,
E. Carrera, D. Scano, E. Zappino
wiley +1 more source
Jixie chuandong, 2018 For unmanned helicopter economic cruises,main rotor speed changes could be significant. At present,the most effective method of changing the main rotor speed associated with the great speed range and low cost is a variable speed gear transmission ...
Li Zhengminqing +4 more
doaj
Flight Control of a Novel Distributed Tiltrotor UAV With Experiments
IET Control Theory &Applications, Volume 20, Issue 1, January/December 2026.Considering the mode transition control of a novel distributed tiltrotor UAV, we designed a fast fixed‐time sliding mode attitude controller to improve the response speed and robustness of the control system. Furthermore, a smooth mode transition strategy is developed to guarantee the stable conversion between fixed‐wing and helicopter modes ...
Li Yu +4 more
wiley +1 more source
IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.This paper addresses the problem of time‐frequency representation (TFR) for radar micro‐Doppler signals of low‐slow‐small (LSS) targets under noisy and multi‐component conditions. ADCC‐TFNet is proposed to generate input‐conditioned complex kernels and enhance time‐frequency ridge continuity and concentration.
Jinhao Wang +5 more
wiley +1 more source
An investigation of coupling ship/rotor flowfield using steady and unsteady rotor methods
Engineering Applications of Computational Fluid Mechanics, 2017 A coupling numerical methodology has been developed using the Navier–Stokes solver for ship/rotor flowfield simulation during the helicopter shipboard launch.
Yongjie Shi, Yi Xu, Kun Zong, Guohua Xu
doaj +1 more source
Design and Physical Prototyping of a Novel Braking System for a Helicopter Rotor
Designs, 2019 The aim of this paper was to demonstrate the improved functionality and performance of an electromechanical brake for a helicopter main rotor, which to date has been hydraulically actuated using a disc brake and caliper arrangement.
Julian D. Booker +2 more
doaj +1 more source
Modelling the Draganflyer four-rotor helicopter
IEEE International Conference on Robotics and Automation, 2004. Proceedings. ICRA '04. 2004, 2004 The Draganflyer is a radio-controlled helicopter. It is powered by 4 rotors and is capable of motion in air in 6 degrees of freedom and of stable hovering. For flying it requires a high degree of skill, with the operator continually making small adjustments.
openaire +2 more sources
Xibei Gongye Daxue Xuebao, 2019 This paper studies helicopter optimal landing and control procedure after tail rotor control failure (TRCF) in different collective pitch. The optimal control problem of landing after tail rotor control failure was solved numerically by direct multiple ...
doaj +1 more source