Results 111 to 120 of about 10,614 (216)
Cascaded ADRC Framework for Robust Control of Coaxial UAVs with Uncertainties and Disturbances
DronesCoaxial contra-rotor unmanned aerial vehicles (UAVs) are attractive for their compact structure and aerodynamic efficiency, making them suitable for long-endurance and heavy-payload operations.
Can Cui +3 more
doaj +1 more source
Electronic Components Subsystems and Equipment: a Compilation [PDF]
Developments in electronic components, subsystems, and equipment are summarized. Topics discussed include integrated circuit components and techniques, circuit components and techniques, and cables and ...
core +1 more source
Ground resonance analysis using a substructure modeling approach [PDF]
, 1985 A convenient and versatile procedure for modeling and analyzing ground resonance phenomena is described and illustrated. A computer program is used which dynamically couples differential equations with nonlinear and time dependent coefficients.
Austin, E. E., Berman, A., Chen, S. Y.
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Influence of configuration effects on multiple burst simulation testing [PDF]
During the initial phase of a lightning strike attachment on an aircraft, fast current pulses (rise time approximately 100 ns, I(sub max) approximately few kA) were measured, which can create equipment upsets or disturbances.
Cantaloube, M., Emanuely, J. L.
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Modeling and Simulation of Coaxial Helicopter Rotor Aerodynamics
, 2009 A framework is developed for the computational fluid dynamics (CFD) analyses of a series of helicopter rotor flowfields in hover and in forward flight. The methodology is based on the unsteady solutions of the three-dimensional, compressible Navier-Stokes equations recast in a rotating frame of reference.
openaire +2 more sources
NASA Lewis Research Center/University Graduate Research Program on Engine Structures [PDF]
NASA Lewis Research Center established a graduate research program in support of the Engine Structures Research activities. This graduate research program focuses mainly on structural and dynamics analyses, computational mechanics, mechanics of ...
Chamis, C. C.
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Communications techniques and equipment: A compilation [PDF]
This Compilation is devoted to equipment and techniques in the field of communications. It contains three sections. One section is on telemetry, including articles on radar and antennas.
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An Exploration of the Performance and Acoustic Characteristics of UAV-Scale Stacked Rotor Configurations [PDF]
As interest grows in rotor- and propeller-driven electric vertical takeoff and landing (eVTOL) aircraft for the Urban Air Mobility market, there is a potential for previously studied concepts to reemerge due to the opportunities afforded by novel ...
Fei, Xiaofan +5 more
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COAXIAL ROTOR SYSTEMS – CHARACTERISTICS AND PERFORMANCES
SCIENTIFIC RESEARCH AND EDUCATION IN THE AIR FORCE, 2018 Constantin ROTARU +3 more
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Reliability model for planetary gear [PDF]
A reliability model is presented for planetary gear trains in which the ring gear is fixed, the Sun gear is the input, and the planet arm is the output.
Coy, J. J., Paridon, C. A., Savage, M.
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