Aerodynamic Analysis of Rotor Spacing and Attitude Transition in Tilt-Powered Coaxial Rotor UAV [PDF]
SensorsComplex aerodynamic characteristics and optimal control during the attitude transition of tilt-powered coaxial twin-rotor unmanned aerial vehicles (UAVs) represent key challenges in flight control design.
Wei Wu +4 more
exaly +6 more sources
Experimental Investigation on Hover Performance of a Ducted Coaxial-Rotor UAV [PDF]
Sensors, 2023 This paper presents experimental investigations on aerodynamic performance of a ducted coaxial-rotor system to evaluate its potential application as a small unmanned aerial vehicle (SUAV).
Hai Li
exaly +4 more sources
Investigation of Rotor Efficiency with Varying Rotor Pitch Angle for a Coaxial Drone
Drones, 2022 Coaxial rotor systems are appealing for multirotor drones, as they increase thrust without increasing the vehicle’s footprint. However, the thrust of a coaxial rotor system is reduced compared to having the rotors in line.
Jørgen Apeland +2 more
exaly +5 more sources
Effect of Blade Tip Configurations on the Performance and Vibration of a Lift-Offset Coaxial Rotor
Aerospace, 2023 This present study investigates the effect of blade tip configurations, such as the sweepback angle and anhedral angle, on the performance and hub vibratory loads for the lift-offset coaxial rotor of a 30,000-pound-class high-speed long-range utility ...
Jae-Sang Park
exaly +5 more sources
Investigation on Aerodynamic Noise Characteristics of Coaxial Rotor in Hover
Applied Sciences (Switzerland), 2022 A numerical method based on Reynolds Averaged Navier–Stokes (RANS) equations and a high-efficiency trim model is developed to simulate the aerodynamics of a coaxial rotor.
Haotian Qi
exaly +3 more sources
Vibration loads analysis of coaxial rigid rotor in rotor interaction
Xibei Gongye Daxue Xuebao, 2021 A vibration load computing method for a coaxial rigid rotor was developed and applied to analyzing its vibration load in rotor interference. The structural dynamics model based on the medium-size deformation beam theory and the double-rotor aerodynamics ...
Yu Zhihao +3 more
doaj +2 more sources
Wind Tunnel Studies on Hover and Forward Flight Performances of a Coaxial Rigid Rotor
Aerospace, 2021 The aerodynamic performance of a reduced-scale coaxial rigid rotor system in hover and steady forward flights was experimentally investigated to gain insights into the effect of interference between upper and lower rotors and the influences of the ...
Haowen Wang, Xianmin Peng
exaly +3 more sources
Aerodynamic Investigation on a Coaxial-Rotors Unmanned Aerial Vehicle of Bionic Chinese Parasol Seed [PDF]
BiomimeticsAerodynamic investigation of a bionic coaxial-rotors unmanned aerial vehicle (UAV) is performed. According to Chinese parasol seed features and flight requirements, the bionic conceptual design of a coaxial-rotors UAV is described.
Wenbiao Gan +3 more
doaj +2 more sources
A Fault Diagnosis Model for Coaxial-Rotor Unit Using Bidirectional Gate Recurrent Unit and Highway Network [PDF]
Machines, 2022 A turbojet engine is the most significant part of an Internal Combustion Engine (ICE) for Hybrid Electric Vehicles. Specifically, the coaxial-rotor unit is the key component, whose performance largely affects the working efficiency.
Zhaoqin Peng +3 more
doaj +2 more sources
Aerospace, 2021 In view of the uncertainty of model parameters, the influence of external disturbances and sensor noise on the flight of coaxial rotor aircraft during autonomous flight, a robust backstepping sliding mode control algorithm for the position and attitude ...
Lun Li, Yongping Hao, Jiulong Xu
exaly +3 more sources