Results 81 to 90 of about 199,767 (264)
Fault tolerant control of a quadrotor using L-1 adaptive control [PDF]
, 2016 Purpose – The growing use of small unmanned rotorcraft in civilian applications means that safe operation is increasingly important. The purpose of this paper is to investigate the fault tolerant properties to faults in the actuators of an L1 adaptive ...
Cooke, A. K. +2 more
core +1 more source
Weed detection using unmanned aircraft vehicles
Julius-Kühn-Archiv, 2014 In contrast to agricultural remote sensing technologies, which are based on images from satellites or manned aircrafts, photogrammetry at low altitude from unmanned aircraft vehicles lead to higher spatial resolution, real-time processing and lower costs. Moreover multicopter aircrafts are suitable vehicles to perform precise path or stationary flights.
Pflanz, Michael +2 more
openaire +1 more source
Risk Times in Mission‐Oriented Systems
Quality and Reliability Engineering International, EarlyView.ABSTRACT This article assesses risk times in mission‐oriented systems with high safety standards. We examine critical times under two safety policies. The first requires that the system's reliability function, known the first failure of the components, must exceed a reliability level throughout the mission.
Antonio Arriaza +2 more
wiley +1 more source
Protect Your Sky: A Survey of Counter Unmanned Aerial Vehicle Systems
IEEE Access, 2020 Recognizing the various and broad range of applications of unmanned aerial vehicles (UAVs) and unmanned aircraft systems (UAS) for personal, public and military applications, recent un-intentional malfunctions of uncontrollable UAVs or intentional ...
Honggu Kang +4 more
semanticscholar +1 more source
Remote Sensing in Ecology and Conservation, EarlyView.Targeted conservation measures are contingent on robust knowledge of spatio‐temporal animal distribution in areas of interest. We explore unmanned aerial vehicle (UAV) transect monitoring as a novel method for standardized digital aerial surveys of marine megafauna by investigating the fine‐resolution spatio‐temporal distribution of harbour porpoises ...
Dinah Hartmann +2 more
wiley +1 more source
Lift–Drag Performance of a New Unmanned Aerial Vehicle in Different Media and Ground Effect
Journal of Marine Science and EngineeringWater–air trans-media unmanned vehicle is a kind of aircraft, which can freely fly in the air, sail in the water and pass through free surface. For trans-media aircrafts, the development process from air–surface to air–underwater and from submarine ...
Wenhua Wang +3 more
doaj +1 more source
Perception is Everything: Repairing the Image of American Drone Warfare [PDF]
, 2018 This thesis will trace the United States’ development of unmanned warfare from its initial use in the World Wars through the Cold War to its final maturation in the War on Terror.
Tubbs, Luke
core +1 more source
Eye of the Storm: Observing Hurricanes with a Small Unmanned Aircraft System
Bulletin of The American Meteorological Society - (BAMS), 2020 Unique data from seven flights of the Coyote small unmanned aircraft system (sUAS) were collected in Hurricanes Maria (2017) and Michael (2018). Using NOAA’s P-3 reconnaissance aircraft as a deployment vehicle, the sUAS collected high-frequency (>1 Hz ...
J. Cione +15 more
semanticscholar +1 more source
Systems Engineering, EarlyView.ABSTRACT System of Systems (SoS) environments are inherently complex, involving numerous operationally and managerially independent component systems with hidden interdependencies and frequent interactions based on unstructured data. In this paper, we propose using graphical Retrieval‐Augmented Generation (GraphRAG), a tool that combines large language
Yinchien Huang +2 more
wiley +1 more source
Journal of Aerospace Technology and Management, 2012 The present paper has discussed investigations about the propeller slipstream effects on the aerodynamics of a generic unmanned air vehicle platform in the wind tunnel for a broad advance ratio range.
Adnan Maqsood +2 more
doaj