Results 61 to 70 of about 92,623 (181)
Aerodynamic Optimization Design of Duct Body Structure for Coaxial Rotor Unmanned Aerial Vehicles
International Journal of Aerospace Engineering, Volume 2024, Issue 1, 2024.With the rapid development of vertical takeoff and landing aircraft, urban air traffic has gradually attracted people’s attention. The lift system is a key technology in the composition of vertical takeoff and landing aircraft systems. Due to its compact structure, low noise, safety, and reliability, the ducted lift body has been widely used as a ...
Du Siliang +3 more
wiley +1 more source
Prediction of the Flight Dynamics of Maneuvering Multirotor Aircraft
International Journal of Aerospace Engineering, Volume 2024, Issue 1, 2024.A simulation environment is presented that predicts the flight trajectory of a maneuvering multirotor aircraft using a purely physics‐based approach without the need for a priori flight test data. The flight dynamics model determines the motion of the aircraft based on the total loads and commanded motor speeds.
Devin Barcelos +3 more
wiley +1 more source
Helicopter tail rotor thrust and main rotor wake coupling in crosswind flight [PDF]
, 2010 The tail rotor of a helicopter with a single main rotor configuration can experience a significant reduction in thrust when the aircraft operates in crosswind flight. Brown’s vorticity transport model has been used to simulate a main rotor and tail rotor
Fletcher, Timothy M., Brown, Richard
core +4 more sources
Nonlinear Attitude and Altitude Trajectory Tracking Control of a Bicopter UAV in Geometric Framework
Journal of Robotics, Volume 2024, Issue 1, 2024.In this paper, we deal with a Bicopter drone that has two thrusters and two tilting servos. Both the position and attitude dynamics of Bicopter are globally expressed on the Special Euclidean group SE(3). A simple control allocation method is proposed to map between the control wrench and actuator inputs for the Bicopter. A geometric nonlinear attitude
Vijay Reddy Vundela +2 more
wiley +1 more source
STUDY ON OPTIMAL CHARACTERISTICS OF TWO-BLADE ROTORS FOR COAXIAL HELICOPTER OF LIGHT TAKE-OFF WEIGHT
Advanced Engineering Research, 2012 The calculations of the rotor with various geometric and linkage parameters are resulted. The hovering coaxial rotor optimal characteristics for the agricultural version of the Byelorussian-Russian helicopter «Brat» are chosen.
Vitaly V. Dudnik, Vladimir A. Udovenko
doaj
Optimization Design and Propulsion System Sizing Methodology of Double‐Layer Staggered Octocopter
International Journal of Aerospace Engineering, Volume 2024, Issue 1, 2024.Small‐scale multirotor drones often require careful consideration of many aspects including the selection of structural parameters and the propulsion system. Double‐layer staggered octocopters (DLSOs) are a type of arrangement with advantages in structural layout and aerodynamic performance compared with other configurations, which can conserve ...
He Zhu +5 more
wiley +1 more source
STUDY ON OPTIMAL CHARACTERISTICS OF TWO-BLADE ROTORS FOR COAXIAL HELICOPTER OF LIGHT TAKE-OFF WEIGHT
Вестник Донского государственного технического университета, 2018 The calculations of the rotor with various geometric and linkage parameters are resulted. The hovering coaxial rotor optimal characteristics for the agricultural version of the Byelorussian-Russian helicopter «Brat» are chosen.
Vitaly V. Dudnik, Vladimir A. Udovenko
doaj
Modelling and Simulation in Engineering, Volume 2024, Issue 1, 2024.Our research focused on investigating the influence of rotor blade tip geometry on the aerodynamic performance of helicopters during hover flight, with the goal of enhancing overall efficiency. Through computational fluid dynamics (CFD) analysis using the Bell 212 helicopter configuration, we evaluated four different blade tip geometries: rectangular ...
Soufiane Stouti +5 more
wiley +1 more source
Jixie chuandong, 2014 The typical structure of the Eckasha-32 helicopter transmission with a combination of the fixed axis gear train and the differential gear train with the character of the single input and double output is stuchied,it’s significant for the development of ...
徐步算 +3 more
doaj
Fuzzy Control of Micro RC Helicopter with Coaxial Counter-rotating Blades
Journal of Japan Society for Fuzzy Theory and Intelligent Informatics, 2009 本研究では，同軸反転型マイクロヘリコプタの安定飛行を目指す．同軸反転方式のヘリコプタはテイルロータを備えた一般的なシングルロータ方式のヘリコプタとは飛行特性が異なる．本研究では，ファジィ制御手法を用いて，操縦者の制御知識に基づく制御規則を構築し，同軸反転方式のマイクロヘリコプタを安定飛行させる制御器を構築する．構築した制御器を用いて，マイクロヘリコプタのホバリング飛行と軌道追従制御を応用したアクロバティック飛行を実現する．
Ohtake, Hiroshi +2 more
openaire +2 more sources