Results 1 to 10 of about 6,631,530 (188)
Helicopter Test of a Strapdown Airborne Gravimetry System [PDF]
Sensors, 2018 Airborne gravimetry from a helicopter has been a feasible tool since the 1990s, with gravimeters mounted on a gyro-stabilised platform. In contrast to fixed-wing aircrafts, the helicopter allows for a higher spatial resolution, since it can move slower ...
Tim Enzlberger Jensen, Rene Forsberg
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Research on Very High Plateau Test Flight Method of Twin-engine Light Civil Helicopter
Hangkong gongcheng jinzhan, 2022 During the performance flight test at very high plateau,the helicopter is near the using limitation,the flight risk is high. It is necessary to study and develop reasonable and safe test flight methods to obtain accurate helicopter performance data while
LI Shengwei, ZHAO Deyang, LIN Changliang
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A New Algorithm on Automatic Trimming for Helicopter Rotor Aerodynamic Loads
Aerospace, 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
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Xibei Gongye Daxue Xuebao, 2022 For in-flight simulation of variable stability helicopter, how to have the ability to change a wide range of response characteristics and ensure flight safety is an important design problem.
FANG Wei +3 more
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Experimental Investigation of Helicopter Noise While Approaching an Elevated Helipad
Aerospace, 2023 The present paper describes a test campaign performed to investigate the noise footprint emitted by a helicopter in an idealised urban context, reproducing the approach to an elevated helipad.
Giuseppe Gibertini +3 more
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Applied Sciences, 2023 The high level of noise in helicopter cabins considerably compromises the comfort and safety of the pilot and passengers. To verify the feasibility and effectiveness of microperforated panel composite sound absorption structures for noise suppression in ...
Chenglei Li +3 more
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Robot Pilot: A New Autonomous System toward Flying Manned Aerial Vehicles
Engineering, 2023 The robot pilot is a new concept of a robot system that pilots a manned aircraft, thereby forming a new type of unmanned aircraft system (UAS) that makes full use of the platform maturity, load capacity, and airworthiness of existing manned aircraft ...
Zibo Jin, Daochun Li, Jinwu Xiang
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Signal Enhancement of Helicopter Rotor Aerodynamic Noise Based on Cyclic Wiener Filtering
Applied Sciences, 2022 The research on helicopter rotor aerodynamic noise becomes imperative with the wide use of helicopters in civilian fields. In this study, a signal enhancement method based on cyclic Wiener filtering was proposed given the cyclostationarity of rotor ...
Chengfeng Wu +3 more
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Aerodynamic Modeling and Performance Analysis of Variable-Speed Coaxial Helicopter
Applied Sciences, 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, Ming Chen, Liang Li
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Vojnotehnički Glasnik, 2010 U radu je prikazan postupak i metodologija ispitivanja vibracija na helikopteru 'gazela' radi definisanja efikasnosti prigušenja vibracija na vezi struktura - sedište pilota.
Miroslav M. Jovanović
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