Research progress in functionally gradient composite materials
Journal of Aeronautical MaterialsWith advancements in material technology，a surge in research and development has been witnessed for various high-performance materials，including metamaterials，each possessing unique functionalities.
LI Wenzhi, HE Zhiping, CAO Yaoqin
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CFD Analysis of Helicopter Wakes in Ground Effect [PDF]
, 2018 The paper presents CFD results for the wake of a helicopter flying a low altitude at different advance ratios. The wakes are assessed in terms of topology and velocity magnitudes.
Barakos, G. N. +4 more
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Interactional aerodynamics and acoustics of a hingeless coaxial helicopter with an auxiliary propeller in forward flight [PDF]
, 2008 The aerodynamics and acoustics of a generic coaxial helicopter with a stiff main rotor system and a tail- mounted propulsor are investigated using Brown's Vorticity Transport Model.
Brown, R.E. +3 more
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A flight dynamics investigation of compound helicopter configurations [PDF]
, 2013 Compounding has often been proposed as a method to increase the maximum speed of the helicopter. There are two common types of compounding known as wing and thrust compounding.
Ferguson, K., Thomson, D.
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Design of an Adaptive Landing Gear with Ground Contact Sensing Capability
Nanjing Hangkong Hangtian Daxue XuebaoTo improve the landing capability of helicopters on complex terrain， this paper proposes an adaptive landing gear with ground contact sensing capability.
LI Qi, MIAO Hongtao, YANG Yun
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Scoop attachment makes helicopter recoveries easier and safer [PDF]
, 1965 Helicopter with rigid boom and net attachment performs rescue or recovery operations easily and safely. The attachment in the front of the helicopter scoops objects from difficult and otherwise inaccessible areas and pivots to the side hatch of the ...
Koons, W. E.
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Decision-making support system of civil helicopter maritime search and rescue for people in distress
Hangkong gongcheng jinzhanHelicopter maritime search and rescue（MSAR）is one of the important components in aviation emergency rescue system. However，the MSAR unit usually analyzes distress information and makes response plans according to previous experience，which lacks the ...
CHEN Zikun
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A review of US Army aircrew-aircraft integration research programs [PDF]
If the U.S. Army's desire to develop a one crew version of the Light Helicopter Family (LHX) helicopter is to be realized, both flightpath management and mission management will have to be performed by one crew.
Aiken, E. W., Key, D. C.
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Investigation of a Compound Helicopter Flying the Depart and Abort Mission Task Element [PDF]
, 2017 The next generation of rotorcraft will have to satisfy the appropriate handling qualities requirements before entering service. Many of these vehicles will operate at significantly greater speeds than the conventional helicopter and will therefore have
Anderson, Dave +2 more
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Influence of Smart Spring Support Parameters on Vibration Characteristics of Three Support Shafting
Applied Sciences, 2020 Smart spring support is a kind of active damping device based on piezoelectric material. It can effectively suppress the vibration of a shaft system in an overly critical state by changing the stiffness and damping of the support.
Miao-miao Li +4 more
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