The Experts below are selected from a list of 8439 Experts worldwide ranked by ideXlab platform
M. Kovac - One of the best experts on this subject based on the ideXlab platform.
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Wind and water tunnel testing of a morphing aquatic Micro Air Vehicle.
Interface focus, 2017Co-Authors: Robert Siddall, Alejandro Ortega Ancel, M. KovacAbstract:Aerial robots capable of locomotion in both Air and water would enable novel mission profiles in complex environments, such as water sampling after floods or underwater structural inspections. The design of such a Vehicle is challenging because it implies significant propulsive and structural design trade-offs for operation in both fluids. In this paper, we present a unique Aquatic Micro Air Vehicle (AquaMAV), which uses a reconfigurable wing to dive into the water from flight, inspired by the plunge diving strategy of water diving birds in the family Sulidae. The Vehicle's performance is investigated in wind and water tunnel experiments, from which we develop a planar trajectory model. This model is used to predict the dive behaviour of the AquaMAV, and investigate the efficacy of passive dives initiated by wing folding as a means of water entry. The paper also includes first field tests of the AquaMAV prototype where the folding wings are used to initiate a plunge dive.
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a water jet thruster for an aquatic Micro Air Vehicle
International Conference on Robotics and Automation, 2015Co-Authors: Robert Siddall, M. KovacAbstract:Water sampling with autonomous aerial Vehicles has major applications in water monitoring and chemical accident response. Currently, no robot exists that is capable of both underwater locomotion and flight. This is principally because of the major design tradeoffs for operation in both water and Air. A major challenge for such an aerial-aquatic mission is the transition to flight from the water. The use of high power density jet propulsion would allow short, impulsive take-offs by Micro Air Vehicles (MAVs). In this paper, we present a high power water jet propulsion system capable of launching a 70 gram Vehicle to speeds of 11m/s in 0.3s, designed to allow waterborne take off for an Aquatic Micro Air Vehicle (AquaMAV). Jumps propelled by the jet are predicted to have a range of over 20m without gliding. Propulsion is driven by a miniaturised 57 bar gas release system, with many other applications in pneumatically actuated robots. We will show the development of a theoretical model to allow designs to be tailored to specific missions, and free flying operation of the jet.
Mohamed Khalgui - One of the best experts on this subject based on the ideXlab platform.
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Micro Air Vehicle link mavlink in a nutshell a survey
IEEE Access, 2019Co-Authors: Anis Koubâa, Azza Allouch, Maram Alajlan, Yasir Javed, Abdelfettah Belghith, Mohamed KhalguiAbstract:The Micro Air Vehicle link (MAVLink in short) is a communication protocol for unmanned systems (e.g., drones and robots). It specifies a comprehensive set of messages exchanged between unmanned systems and ground stations. This protocol is used in major autopilot systems, mainly ArduPilot and PX4, and provides powerful features not only for monitoring and controlling unmanned systems missions but also for their integration into the Internet. However, there is no technical survey and/or tutorial in the literature that presents these features or explains how to make use of them. Most of the references are online tutorials and basic technical reports, and none of them presents comprehensive and systematic coverage of the protocol. In this paper, we address this gap, and we propose an overview of the MAVLink protocol, the difference between its versions, and it is potential in enabling Internet connectivity to unmanned systems. We also discuss the security aspects of the MAVLink. To the best of our knowledge, this is the first technical survey and tutorial on the MAVLink protocol, which represents an important reference for unmanned systems users and developers.
Robert Siddall - One of the best experts on this subject based on the ideXlab platform.
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Wind and water tunnel testing of a morphing aquatic Micro Air Vehicle.
Interface focus, 2017Co-Authors: Robert Siddall, Alejandro Ortega Ancel, M. KovacAbstract:Aerial robots capable of locomotion in both Air and water would enable novel mission profiles in complex environments, such as water sampling after floods or underwater structural inspections. The design of such a Vehicle is challenging because it implies significant propulsive and structural design trade-offs for operation in both fluids. In this paper, we present a unique Aquatic Micro Air Vehicle (AquaMAV), which uses a reconfigurable wing to dive into the water from flight, inspired by the plunge diving strategy of water diving birds in the family Sulidae. The Vehicle's performance is investigated in wind and water tunnel experiments, from which we develop a planar trajectory model. This model is used to predict the dive behaviour of the AquaMAV, and investigate the efficacy of passive dives initiated by wing folding as a means of water entry. The paper also includes first field tests of the AquaMAV prototype where the folding wings are used to initiate a plunge dive.
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a water jet thruster for an aquatic Micro Air Vehicle
International Conference on Robotics and Automation, 2015Co-Authors: Robert Siddall, M. KovacAbstract:Water sampling with autonomous aerial Vehicles has major applications in water monitoring and chemical accident response. Currently, no robot exists that is capable of both underwater locomotion and flight. This is principally because of the major design tradeoffs for operation in both water and Air. A major challenge for such an aerial-aquatic mission is the transition to flight from the water. The use of high power density jet propulsion would allow short, impulsive take-offs by Micro Air Vehicles (MAVs). In this paper, we present a high power water jet propulsion system capable of launching a 70 gram Vehicle to speeds of 11m/s in 0.3s, designed to allow waterborne take off for an Aquatic Micro Air Vehicle (AquaMAV). Jumps propelled by the jet are predicted to have a range of over 20m without gliding. Propulsion is driven by a miniaturised 57 bar gas release system, with many other applications in pneumatically actuated robots. We will show the development of a theoretical model to allow designs to be tailored to specific missions, and free flying operation of the jet.
Robert J. Wood - One of the best experts on this subject based on the ideXlab platform.
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A flapping-wing Micro Air Vehicle with interchangeable parts for system integration studies
IEEE International Conference on Intelligent Robots and Systems, 2012Co-Authors: Ranjana Sahai, Michael Karpelson, Kevin C. Galloway, Robert J. WoodAbstract:This paper describes the development of a unique flapping-wing Micro Air Vehicle (FWMAV) whose major components, i.e. the motor, transmission mechanisms, and wings, are rapidly interchangeable. When coupled with a test stand that includes a 6-axis force sensor, encoder, power-recording capabilities, and high speed video, the result is a highly versatile experimental platform on which system integration studies can be conducted. This paper provides a detailed description of the design and fabrication of this FWMAV whose interchangeability of parts is mostly accomplished through a novel system of tabs, slots, and retaining rods. Results of a study on energy saving elements in the transmission mechanism as well as an exploration of this effect for different wing sizes are also presented. Finally, the implications of interchangeable parts on the creation of customizable flyers are discussed.
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system identification and linear time invariant modeling of an insect sized flapping wing Micro Air Vehicle
Intelligent Robots and Systems, 2011Co-Authors: Benjamin M Finio, Nestor O Perezarancibia, Robert J. WoodAbstract:Flapping-wing robots typically include numerous nonlinear elements, such as nonlinear geometric and aerodynamic components. For an insect-sized flapping-wing Micro Air Vehicle (FWMAV), we show that a linearized model is sufficient to predict system behavior with reasonable accuracy over a large operating range, not just locally around the linearization state. The theoretical model is verified against an identified model from a prototype robotic fly and implications for Vehicle design are discussed.
Emilie J Siochi - One of the best experts on this subject based on the ideXlab platform.
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electrospinning of a Micro Air Vehicle wing skin
Polymer, 2003Co-Authors: Kristin Pawlowski, H L Belvin, D L Raney, Joycelyn S Harrison, Emilie J SiochiAbstract:Electrospinning was utilized to create lightweight, electrically responsive wing skins for Micro-Air Vehicle (MAV) wing frame designs. Various compositions of an electroactive polymer were investigated to determine the appropriate electrospinning conditions for these materials. Electrospun mats of these materials were characterized via optical Microscopy and scanning electron Microscopy. Tensile properties of the electrospun fibers were also measured. An optimal polymer composition was electrospun onto MAV wing frames to create a bird wing-like texture. Preliminary testing of electroactivity of these prototype MAV wings is reported here.
