Results 11 to 20 of about 1,267 (185)

Aerodynamics Analysis of Helicopter Rotor in Flight Test Using Strain Gauge Sensors [PDF]

open access: yesSensors
The acquisition of aerodynamic loads on helicopter rotors is fundamental to the study of helicopter performance optimization, structural design, flight control, and other aspects.
Shuaike Jiao, Jiahong Zheng
doaj   +2 more sources

Research on Tail Rotor Load Test Flight Technology for Helicopters Based on Strain Sensor Measurement [PDF]

open access: yesSensors
The load characteristics of the helicopter tail rotor system are critical to flight safety and handling performance, and flight testing remains the most direct and reliable means to obtain authentic load data.
Shuaike Jiao   +3 more
doaj   +2 more sources

Modeling and Analysis of Rotor System Tolerance Based on Small Displacement Torsor

open access: yesHangkong gongcheng jinzhan, 2021
Helicopter vibration is closely related to manufacturing technology.Reducing manufacturing error can effectively reduce helicopter vibration.In order to analyze the geometric rotation accuracy of helicopter rotor system, the key tolerance on the assembly
LIU Zhuangzhuang, HAN Dong
doaj   +1 more source

Experimental research of single - rotor helicopter unintentional yaw rotation

open access: yesНаучный вестник МГТУ ГА, 2020
Aviation accidents related to unintentional rotation may periodically occur while flying single-rotor helicopters. On-time and correct actions may help the pilot to find the way out of this hazardous situation.
V. V. Efimov   +3 more
doaj   +1 more source

Analysis of Rotor/Propeller/Fuselage Interaction Characteristics of High-speed Helicopter

open access: yesHangkong gongcheng jinzhan, 2020
The study on aerodynamic characteristics of high-speed helicopter with double-thrust-propeller can provide the reference for the design and aerodynamic optimization of high-speed helicopter.
SHEN Suiyuan   +4 more
doaj   +1 more source

A New Algorithm on Automatic Trimming for Helicopter Rotor Aerodynamic Loads

open access: yesAerospace, 2023
In order to simulate the flight state of the helicopter effectively, it is necessary to trim the helicopter during the forward flight in a wind tunnel test.
Xinfan Yin   +5 more
doaj   +1 more source

Flying control of small-type helicopter by detecting its in-air natural features

open access: yesJournal of Electrical Systems and Information Technology, 2015
Control of a small type helicopter is an interesting research area in unmanned aerial vehicle development. This study aims to detect a more typical helicopter unequipped with markers as a means by which to resolve the various issues of the prior studies.
Chinthaka Premachandra   +2 more
doaj   +1 more source

Hardware-in-the-Loop simulation algorithm for helicopter rotor time-varying echo signals

open access: yesSystems Science & Control Engineering, 2021
The inherent micro-Doppler (m-D) feature of helicopter rotor echoes has been widely used in signal detection and identification. To meet the high accuracy and real-time performance requirements of the hardware-in-the-loop (HIL) simulation, this paper ...
Shihong Chen
doaj   +1 more source

Flight Mechanics Modeling of the New Configuration Tilt-rotor

open access: yesHangkong gongcheng jinzhan, 2019
The flight mechanical model of tilt-rotor UAV is the basis of designing flight control rate and analyzing flight characteristics.Based on the engineering reality, the nonlinear flight mechanics model of a new configuration tilt-rotor UAV is set up ...
Zhang Lian   +3 more
doaj   +1 more source

Mathematical description of the interaction between a probing microwave signal and the helicopter main rotor blade

open access: yesВестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, 2016
The paper deals with the non-contact method of monitoring the integrity of the main rotor blades of a helicopter. The available methods of monitoring the integrity of the main rotor blades of the helicopter are labor-intensive to implement, their ...
A. I. Danilin, S. V. Zhukov, M. S. Popov
doaj   +1 more source

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