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Thoracic vibrations in stingless bees (Melipona seminigra): resonances of the thorax influence vibrations associated with flight but not those associated with sound production
(COMPANY OF BIOLOGISTS LTD, 2008)
Bees generate thoracic vibrations with their indirect flight muscles in various behavioural contexts. The main frequency component of non-flight vibrations, during which the wings are usually folded over the abdomen, is ...
Estimating the oscillation frequency of a payload mass on quadcopter in non-autonomous flight
(2021-01-01)
Unmanned aerial vehicles (UAVs) have been employed in several engineering applications, such as aerial photography, environmental surveillance, delivery tasks, and others. Most of these applications have attracted increasing ...
Fundamental analysis on the intentional use of nonlinear stiffness in some dynamical systems
(2019-01-01)
Although nonlinearity in dynamical systems have been of concern for many years due to its unpredictable effects, researchers and engineers have recently begun to incorporate it into mechanical and mechatronic devices to ...
Effect of asymmetry in the restoring force of the click mechanism in insect flight
(Iop Publishing Ltd, 2016-01-01)
The aim of this paper is to examine the effect of asymmetry in the force-deflection characteristics of an insect flight mechanism on its nonlinear dynamics. An improved simplified model for insect flight mechanism is ...
Isolamento passivo de vibrações aleatórias atuantes sobre equipamentos eletrônicos aeronaúticos embarcados
(Universidade Estadual Paulista (Unesp), 2006-12)
Equipamentos aeronáuticos embarcados podem ser submetidos a elevados níveis de vibração durante o vôo. Normas internacionais especificam os níveis de vibração que os componentes de uso civil e militar devem ser capazes de ...
Vibration Analysis of a Payload connected to Quadrotor-type UAV by SMA Spring
(2022-01-01)
Unmanned Aerial Vehicles (UAVs) have the ability to carry different payloads, and sensors. However, in the presence of any onboard component or attachment load, the UAV dynamics is changed, and its performance can be ...
Análise da vibração induzida pelas pás do rotor principal do helicóptero h-50 (esquilo)
(Universidade Federal do Rio Grande do NorteBrasilUFRNEngenharia MecânicaEngenharia Mecânica, 2022-01-28)
. Helicopter vibration is an extremely undesirable phenomenon. Either by causing premature wear in the mechanical components or by causing immense harm to the health of the crew. The vibration induced by the difference in ...
Isolamento passivo de vibrações aleatórias atuantes sobre equipamentos eletrônicos aeronaúticos embarcados
(Universidade Estadual Paulista (UNESP), 2014)
Desenvolvimento de um sistema para identificação de impactos de alta energia em aeronaves de asas rotativas proveniente de arma de fogo
(Universidade Federal de Minas GeraisBrasilENG - DEPARTAMENTO DE ENGENHARIA MECÂNICAPrograma de Pós-Graduação em Engenharia MecanicaUFMG, 2020-02-28)
Consolidated as a versatile and indispensable instrument in the fight against crime, in the increase of security detection and in the support of different policing threats, the helicopter has proven its value due to its ...