Results 1 to 10 of about 3,980 (196)
Identification and modeling of the three rotational movements of a miniature coaxial helicopter [PDF]
Simulation, 2013 This paper presents the identification of a miniature coaxial helicopter system. First, the helicopter flying principles are described and the hardware setup of the developed platform is presented.
Silviu Folea +2 more
exaly +5 more sources
An Analytical Method for Coaxial Helicopter Ground Resonance [PDF]
MATEC Web of Conferences, 2020 A time-frequency analytical method is presented to analyze physical mechanism of coaxial helicopter ground resonance. Eigenvalue calculation and numerical integration of disturbance equations of motions are used to obtain modal characters and time-domain
Liu Xiangyi +4 more
doaj +2 more sources
Aerodynamic Modeling and Performance Analysis of Variable-Speed Coaxial Helicopter
Applied Sciences (Switzerland), 2022 In this paper, the variable-speed coaxial helicopter is modelled by the blade element method, non-uniform inflow method and empirical function method, and the aerodynamic performance analysis method is proposed.
Anan Xu, Fang Wang
exaly +3 more sources
Applied Sciences (Switzerland), 2023 In this paper, a computational fluid dynamics simulation method is developed to study the influence of the rotor overlapping azimuth on the aerodynamic performance of compound coaxial helicopter.
Liang Li, Chenglong Zhou, Fang Wang
exaly +3 more sources
Engineering Applications of Computational Fluid Mechanics, 2019 Coupled ship/coaxial-rotor simulations have been conducted to investigate the rotor loads of a shipborne coaxial-rotor helicopter during a vertical landing based on Reynolds-averaged Navier-Stokes (RANS) solver.
Guohua Xu
exaly +2 more sources
Design analysis and construction of energy harvesting coaxial helicopter
Aviation, 2013 With the growing need for technology, the tendency for errors has increased many times, which often results in loss of human lives. Our main aim of this paper is to show the implementation of a coaxial rotor aerial vehicle that can be controlled by a ...
Anvinder Singh, Varun Sharma
doaj +3 more sources
Hovering of coaxial Trirotor helicopter constructed with coaxial mechanism driven by a motor
Nihon Kikai Gakkai ronbunshu, 2014 This paper proposes a coaxial trirotor helicopter constructed with coaxial mechanism driven by one motor. There two types of trirotor unmanned aerial vehicles (UAVs) are existed.
Yoshihiro TAKITA +2 more
doaj +3 more sources
Modelling and robust control of an unmanned coaxial rotor helicopter with unstructured uncertainties
Advances in Mechanical Engineering, 2017 A complete methodology for an unmanned coaxial rotor helicopter with unstructured uncertainties was proposed to achieve high-accuracy tracking performance from modelling to robust control.
Chao Liu, Jin-Lin Liu
exaly +2 more sources
Aerodynamic Analysis and Optimization of a Coaxial Helicopter Fuselage [PDF]
Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 2021 The flight dynamics and flight envelope of coaxial ultralight helicopter CoAX 2D were investigated. For this purpose, series of flight tests was carried out. This paper presents the computation of the fuselage aerodynamics of the CoAX 2D with the DLR flow solver TAU.
exaly +4 more sources
The effect of floating spline parameter on the dynamic characteristic of encased differential planetary gear train [PDF]
Scientific ReportsThe load sharing performance of encased differential planetary system has a great impact on the operating performance and service life of the transmission system of the coaxial high speed helicopter.
Xiaoyu Che +3 more
doaj +2 more sources