Results 81 to 90 of about 189,174 (279)
Geometrically Nonlinear Analysis of Composite Beams Based Using a Space–Time Finite Element Method
AerospaceIn this paper, we present a transient-format time-continuous Galerkin finite element method for fully intrinsic geometrically exact beam equations that are energy-consistent.
Xin Hu, Lidao Chen, Yong Liu
doaj +1 more source
Helicopter noise regulations: An industry perspective [PDF]
A review of helicopter noise measurement programs and noise reduction/economic studies of FAA is given along with a critique of a study which addresses the economic impact of noise reduction on helicopter noise.
Wagner, R. A.
core +1 more source
A Systems Engineering Methodology for System of Autonomous Systems: Architecture and Integration
Systems Engineering, EarlyView.ABSTRACT Artificial intelligence and machine learning (AI/ML) rapidly transform systems by providing autonomous capabilities. This new class of systems can become a constituent system in a system of systems (SoS) to evolve it into a system of autonomous systems (SoAS).
Mohammadreza Torkjazi, Ali K. Raz
wiley +1 more source
DronesThe unmanned quad tilt-rotor eVTOL (QTRV) is a variable-configuration aircraft that combines the features of vertical takeoff and landing (VTOL), hovering, and high-speed cruising, making its control system design particularly challenging.
Bohai Deng +3 more
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NASA/HAA Advanced Rotorcraft Technology and Tilt Rotor Workshops. Volume 2: Operators' Views [PDF]
A special panel of helicopter users give presentations in 12 basic areas of helicopter applications.
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Monitoring GPS‐collared moose by ground versus drone approaches: efficiency and disturbance effects
Wildlife Biology, EarlyView.Efficient wildlife management requires precise monitoring methods, for example to estimate population density, reproductive success, and survival. Here, we compared the efficiency of drone (equipped with a RGB camera) and ground approaches to detect and observe GPS‐collared female moose Alces alces and their calves. We also quantified how drone (n = 42)
Martin Mayer +8 more
wiley +1 more source
New Progress in Research on Dynamic Stall of Helicopter Rotors
Nanjing Hangkong Hangtian Daxue XuebaoFor over half a century， rotor dynamic stall has remained a key research focus and challenge in helicopter aerodynamics. Through persistent and in-depth exploration， researchers have achieved significant progress in measurement and prediction of rotor ...
JING Simeng +4 more
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A Novel Model-Free Robust Control of Cable-Driven Manipulators
IEEE Access, 2019 A novel model-free robust control is developed for cable-driven manipulators in this work. Using the time-delay estimation (TDE) to estimate system dynamics, an attractive model-free structure is ensured.
Yaoyao Wang +4 more
doaj +1 more source
, 2020 The aim of this study is to validate the Italian version of the Helicopter Parenting Instrument (HPI), a self-report instrument that evaluate adolescents’ and young adults’ perception of parenting behaviors. The term helicopter parenting describes a style of child-rearing characterized by parents who are over-involved in every aspect of their children ...
Pistella, J +4 more
openaire +4 more sources
Aerospatiale is ready to develop a convertiplane with tethering rotors [PDF]
Information on the recent study of the convertiplane is reported. The convertiplane was designed to replace the conventional helicopter. Its speed is much faster than that of the helicopter, it uses less fuel, and can carry up to five passengers.
Morisset, J.
core +1 more source