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Bibliographies thématiques / Outdoor flight / Articles de revues

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Articles de revues sur le sujet « Outdoor flight »

Auteur : Grafiati

Publié le 4 juin 2021

Mis à jour le 17 février 2022

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1

Moon, SungTae, DoYoon Kim, YeonJu Choi, and HyeonCheol Gong. "Introduction of Indoor/Outdoor Swarming Flight System." Journal of Korean Institute of Intelligent Systems 27, no. 3 (2017): 215–23. http://dx.doi.org/10.5391/jkiis.2017.27.3.215.

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Moon, SungTae, YeonJu Choi, DoYoon Kim, Myeonghun Seung, and HyeonCheol Gong. "Outdoor Swarm Flight System Based on RTK-GPS." Journal of KIISE 43, no. 12 (2016): 1315–24. http://dx.doi.org/10.5626/jok.2016.43.12.1315.

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Moon, SungTae, DoYoon Kim, and DonGoo Lee. "Outdoor Swarm Flight System Based on the RTK-GPS." Journal of KIISE 47, no. 3 (2020): 328–34. http://dx.doi.org/10.5626/jok.2020.47.3.328.

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Frank, Kenneth D. "Impact of Outdoor Lighting on Moths." International Astronomical Union Colloquium 112 (1991): 51. http://dx.doi.org/10.1017/s0252921100003687.

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ABSTRACTOutdoor lighting incapacitates and destroys some moths. It disturbs flight, navigation, vision, migration, dispersal, oviposition, mating, feeding, and crypsis. It may also snift circadian rhythms. Lamps may incinerate or desiccate moths, or lead to moth’s destruction by birds, bats, spider, and vehicular traffic. Conservation efforts need to consider disruptive ecological effects of outdoor lighting. Low pressure sodium lamps may reduce these effects.

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Scholz, D., C. Borgemeister, R. H. Markham, and H. M. Poehling. "Flight initiation and flight activity in Prostephanus truncatus (Coleoptera: Bostrichidae)." Bulletin of Entomological Research 88, no. 5 (1998): 545–52. http://dx.doi.org/10.1017/s0007485300026067.

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AbstractIn an outdoor experimental set-up, the number of Prostephanus truncatus (Horn) flying from maize cobs was recorded over 38 observation weeks. Flight activity in the field was recorded for 50 weeks with three pheromone traps, each placed at c. 100–300 m from the first experimental set-up. Multiple regression analyses revealed that both flight initiation and flight activity were partly influenced by mean temperatures, but were not directly related. Flight initiation was mainly dependent on population density. An additional experiment showed that sex ratios among pheromone trap catches we

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Crall, J. D., J. J. Chang, R. L. Oppenheimer, and S. A. Combes. "Foraging in an unsteady world: bumblebee flight performance in field-realistic turbulence." Interface Focus 7, no. 1 (2017): 20160086. http://dx.doi.org/10.1098/rsfs.2016.0086.

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Natural environments are characterized by variable wind that can pose significant challenges for flying animals and robots. However, our understanding of the flow conditions that animals experience outdoors and how these impact flight performance remains limited. Here, we combine laboratory and field experiments to characterize wind conditions encountered by foraging bumblebees in outdoor environments and test the effects of these conditions on flight. We used radio-frequency tags to track foraging activity of uniquely identified bumblebee ( Bombus impatiens ) workers, while simultaneously rec

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Putz, Jasmin, Eva M. Vorwagner, and Gernot Hoch. "Flight performance of Monochamus sartor and Monochamus sutor, potential vectors of the pine wood nematode." Forestry Journal 62, no. 4 (2016): 195–201. http://dx.doi.org/10.1515/forj-2016-0024.

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Abstract Flight performance of Monochamus sartor and Monochamus sutor, two potential vectors of the pine wood nematode, Bursaphelenchus xylophilus was evaluated in laboratory flight mill tests. Beetles emerging from logs infested in the laboratory and incubated under outdoor conditions as well as field collected beetles were used. The maximum distance flown by M. sartor in a single flight was 3,136.7 m. Mean distances (per beetle) per flight ranged from 694.6 m in females to 872.5 m in males for M. sartor. In 75% of all individual flights M. sartor flew less than 1 km; only 3.7% flew distances

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Giudici, Davide, Andrea Monti Guarnieri, and Juan Cuesta Gonzalez. "Pre-Flight SAOCOM-1A SAR Performance Assessment by Outdoor Campaign." Remote Sensing 9, no. 7 (2017): 729. http://dx.doi.org/10.3390/rs9070729.

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Tüzün, Nedim, Lin Op de Beeck, Ranalison Oliarinony, Marie Van Dievel, and Robby Stoks. "Warming under seminatural outdoor conditions in the larval stage negatively affects insect flight performance." Biology Letters 14, no. 5 (2018): 20180121. http://dx.doi.org/10.1098/rsbl.2018.0121.

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Laboratory studies indicate global warming may cause changes in locomotor performance directly relevant for fitness and dispersal. Yet, this remains to be tested under seminatural settings, and the connection with warming-induced alterations in the underlying traits has been rarely studied. In an outdoor mesocosm experiment with the damselfly Ischnura elegans , 4°C warming in the larval stage decreased the flight muscle mass, which correlated with a lower flight endurance. Warming did not affect body mass, size or wing morphology. This illustrates how carry-over effects of warming under semina

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Schiffner, Ingo, and Mandyam V. Srinivasan. "Budgerigar flight in a varying environment: flight at distinct speeds?" Biology Letters 12, no. 6 (2016): 20160221. http://dx.doi.org/10.1098/rsbl.2016.0221.

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How do flying birds respond to changing environments? The behaviour of budgerigars, Melopsittacus undulatus , was filmed as they flew through a tapered tunnel. Unlike flying insects—which vary their speed progressively and continuously by holding constant the optic flow induced by the walls—the birds showed a tendency to fly at only two distinct, fixed speeds. They switched between a high speed in the wider section of the tunnel, and a low speed in the narrower section. The transition between the two speeds was abrupt, and anticipatory. The high speed was close to the energy-efficient, outdoor

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Fukayama, Yukio. "A Study on Acoustic Time-of-flight Identification in Outdoor Environment." Proceedings of the ISCIE International Symposium on Stochastic Systems Theory and its Applications 2004 (May 5, 2004): 85–90. http://dx.doi.org/10.5687/sss.2004.85.

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Junaid, Ali, Alejandro Sanchez, Javier Bosch, Nikolaos Vitzilaios, and Yahya Zweiri. "Design and Implementation of a Dual-Axis Tilting Quadcopter." Robotics 7, no. 4 (2018): 65. http://dx.doi.org/10.3390/robotics7040065.

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Standard quadcopters are popular largely because of their mechanical simplicity relative to other hovering aircraft, low cost and minimum operator involvement. However, this simplicity imposes fundamental limits on the types of maneuvers possible due to its under-actuation. The dexterity and fault tolerance required for flying in limited spaces like forests and industrial infrastructures dictate the use of a bespoke dual-tilting quadcopter that can launch vertically, performs autonomous flight between adjacent obstacles and is even capable of flying in the event of the failure of one or two mo

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Wang, Wei, Feng Wang, Yong Zhou, Yong Cheng, Yu Ze Song, and Kenzo Nonami. "Modeling and Embedded Autonomous Control for Quad-Rotor MAV." Applied Mechanics and Materials 130-134 (October 2011): 2461–64. http://dx.doi.org/10.4028/www.scientific.net/amm.130-134.2461.

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This paper presents outdoor fully autonomous control for a Quad-Rotor MAV (Micro Air Vehicle). In case of natural disaster like earthquake, a MAV will be very effective for surveying the site and environment in dangerous area or narrow space, where human cannot access safely. In addition, it will be helpful to prevent secondary disaster. Our Autonomous Rotary-wing MAV is a quad-rotor type MAV which total mass is 660g and is capable of 10 minute outdoor flights. In order to measure the relative position of the MAV, we have installed a sensor-board which includes GPS, gyro, and acceleration sens

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Baczynska, Katarzyna A., Simon Brown, Adrian C. Chorley, et al. "In-Flight UV-A Exposure of Commercial Airline Pilots." Aerospace Medicine and Human Performance 91, no. 6 (2020): 501–10. http://dx.doi.org/10.3357/amhp.5507.2020.

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INTRODUCTION: Understanding UV exposure is essential for the assessment of its contribution to the occupational risk of pilots developing ocular and skin pathologies. The objective of this observational study was to measure the UV exposure of pilots flying between the United Kingdom and a range of destinations at three different seasons.METHODS: The in-flight UV exposure of pilots was measured on 322 Monarch Airlines short-haul flights on the Airbus A321-231 and Airbus A320-214 to 31 destinations, mostly in Europe, from 4 UK airports in September 2016–August 2017. The erythema effective and UV

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Heinkelé, C., M. Labbé, V. Muzet, and P. Charbonnier. "CALIBRATION OF THE SR4500 TIME-OF-FLIGHT CAMERA FOR OUTDOOR MOBILE SURVEYING APPLICATIONS: A CASE STUDY." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B5 (June 15, 2016): 469–76. http://dx.doi.org/10.5194/isprsarchives-xli-b5-469-2016.

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3D-cameras based on Time-of-Flight (ToF) technology have recently raised up to a commercial level of development. In this contribution, we investigate the outdoor calibration and measurement capabilities of the SR4500 ToF camera. The proposed calibration method combines up-to-date techniques with robust estimation. First, intrinsic camera parameters are estimated, which allows converting radial distances into orthogonal ones. The latter are then calibrated using successive acquisitions of a plane at different camera positions, measured by tacheometric techniques. This distance calibration step

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Heinkelé, C., M. Labbé, V. Muzet, and P. Charbonnier. "CALIBRATION OF THE SR4500 TIME-OF-FLIGHT CAMERA FOR OUTDOOR MOBILE SURVEYING APPLICATIONS: A CASE STUDY." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B5 (June 15, 2016): 469–76. http://dx.doi.org/10.5194/isprs-archives-xli-b5-469-2016.

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3D-cameras based on Time-of-Flight (ToF) technology have recently raised up to a commercial level of development. In this contribution, we investigate the outdoor calibration and measurement capabilities of the SR4500 ToF camera. The proposed calibration method combines up-to-date techniques with robust estimation. First, intrinsic camera parameters are estimated, which allows converting radial distances into orthogonal ones. The latter are then calibrated using successive acquisitions of a plane at different camera positions, measured by tacheometric techniques. This distance calibration step

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Yang, Yi, Daisuke Iwakura, Akio Namiki, Kenzo Nonami, and Wei Wang. "Autonomous Flight of Hexacopter Under Propulsion System Failure." Journal of Robotics and Mechatronics 28, no. 6 (2016): 899–910. http://dx.doi.org/10.20965/jrm.2016.p0899.

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[abstFig src='/00280006/14.jpg' width='250' text='Fault tolerant control structure of hexacopter' ] This paper presents a fault-tolerant approach for the propulsion systems of hexacopters (i.e., rotors and propellers) to overcome failures during outdoor autonomous flight missions. In this study, we used an explicit control allocation method for each stopped motor, and an asymmetrical motor rotation arrangement is applied in order to guarantee the controllability of the yaw. Finally, the developed fault diagnosis and isolation system is tested during a global-positioning-system-based autonomous

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Ajanic, Enrico, Mir Feroskhan, Stefano Mintchev, Flavio Noca, and Dario Floreano. "Bioinspired wing and tail morphing extends drone flight capabilities." Science Robotics 5, no. 47 (2020): eabc2897. http://dx.doi.org/10.1126/scirobotics.abc2897.

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The aerodynamic designs of winged drones are optimized for specific flight regimes. Large lifting surfaces provide maneuverability and agility but result in larger power consumption, and thus lower range, when flying fast compared with small lifting surfaces. Birds like the northern goshawk meet these opposing aerodynamic requirements of aggressive flight in dense forests and fast cruising in the open terrain by adapting wing and tail areas. Here, we show that this morphing strategy and the synergy of the two morphing surfaces can notably improve the agility, maneuverability, stability, flight

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STOIAN, Stefan Eugen, Dragos Daniel ION-GUTA, Sandra Elena NICHIFOR, Florentin SPERLEA, and Achim IONITA. "TWQH Attitude Control Experiments on Horizon Ground Simulator and Flight Test." INCAS BULLETIN 12, no. 1 (2020): 183–98. http://dx.doi.org/10.13111/2066-8201.2020.12.1.18.

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This paper presents the results of two experiments on the Horizon ground simulator and outdoor flight test of TWQH hybrid UAV in presence of wind perturbation. The simulation results show the stability and error boundedness of the PID controller while the experimental inflight tests indicate the good performances of the proposed controller.

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Raimundo, A., D. Peres, N. Santos, P. Sebastião, and N. Souto. "USING DISTANCE SENSORS TO PERFORM COLLISION AVOIDANCE MANEUVRES ON UAV APPLICATIONS." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-2/W6 (August 24, 2017): 303–9. http://dx.doi.org/10.5194/isprs-archives-xlii-2-w6-303-2017.

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The Unmanned Aerial Vehicles (UAV) and its applications are growing for both civilian and military purposes. The operability of an UAV proved that some tasks and operations can be done easily and at a good cost-efficiency ratio. Nowadays, an UAV can perform autonomous missions. It is very useful to certain UAV applications, such as meteorology, vigilance systems, agriculture, environment mapping and search and rescue operations. One of the biggest problems that an UAV faces is the possibility of collision with other objects in the flight area. To avoid this, an algorithm was developed and impl

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Araujo, João Otávio, João Valente, Lammert Kooistra, Sandra Munniks, and Ruud J. B. Peters. "Experimental Flight Patterns Evaluation for a UAV-Based Air Pollutant Sensor." Micromachines 11, no. 8 (2020): 768. http://dx.doi.org/10.3390/mi11080768.

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The use of drones in combination with remote sensors have displayed increasing interest over the last years due to its potential to automate monitoring processes. In this study, a novel approach of a small flying e-nose is proposed by assembling a set of AlphaSense electrochemical-sensors to a DJI Matrix 100 unmanned aerial vehicle (UAV). The system was tested on an outdoor field with a source of NO2. Field tests were conducted in a 100 m2 area on two dates with different wind speed levels varying from low (0.0–2.9m/s) to high (2.1–5.3m/s), two flight patterns zigzag and spiral and at three al

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Lee, Dasol, Sungwook Cho, and Hyunchul Shim. "Development of Mini Quadrotor Platform and Experiments on Outdoor Autonomous Swarming Flight." Journal of Institute of Control, Robotics and Systems 23, no. 11 (2017): 905–11. http://dx.doi.org/10.5302/j.icros.2017.11.23.11.905.

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Lee, Dasol, Sungwook Cho, and Hyunchul Shim. "Development of Mini Quadrotor Platform and Experiments on Outdoor Autonomous Swarming Flight." Journal of Institute of Control, Robotics and Systems 23, no. 11 (2017): 905–11. http://dx.doi.org/10.5302/j.icros.2017.17.0167.

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Toews, Michael D., James F. Campbell, Frank H. Arthur, and Sonny B. Ramaswamy. "Outdoor flight activity and immigration of Rhyzopertha dominica into seed wheat warehouses." Entomologia Experimentalis et Applicata 121, no. 1 (2006): 73–85. http://dx.doi.org/10.1111/j.1570-8703.2006.00462.x.

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Bodó, Zsófia, and Béla Lantos. "Integrating Backstepping Control of Outdoor Quadrotor UAVs." Periodica Polytechnica Electrical Engineering and Computer Science 63, no. 2 (2019): 122–32. http://dx.doi.org/10.3311/ppee.13321.

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In this paper an improved approach is presented for integrating backstepping control of outdoor quadrotor UAVs. The controller uses the approximated nonlinear dynamic model, while for simulation or test purposes the quadrotor can be modeled either with the precise or the simplified model. A hierarchical integrating backstepping control algorithm was constructed that has the capability of handling every effect in the dynamic model and in the meantime successfully ignores the realistic measurement noises. The hierarchical control structure consists of position, attitude and rotor control, extend

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Liang, Shaoran, Bifeng Song, Jianlin Xuan, and Yubin Li. "Active disturbance rejection attitude control for the dove flapping wing micro air vehicle in intermittent flapping and gliding flight." International Journal of Micro Air Vehicles 12 (January 2020): 175682932094308. http://dx.doi.org/10.1177/1756829320943085.

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This paper proposes an attitude control scheme for the Dove flapping wing micro air vehicle in intermittent flapping and gliding flight. The Dove flapping wing micro air vehicle adopts intermittent flapping and gliding flight to make the wing movements more natural; this strategy also has the potential to reduce energy consumption. To implement this specific flight mode, this paper proposes a closed-loop active disturbance rejection control strategy to stabilize the attitude during the processes of flapping flight, transition and gliding flight. The active disturbance rejection control control

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Di Luca, M., S. Mintchev, G. Heitz, F. Noca, and D. Floreano. "Bioinspired morphing wings for extended flight envelope and roll control of small drones." Interface Focus 7, no. 1 (2017): 20160092. http://dx.doi.org/10.1098/rsfs.2016.0092.

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Small-winged drones can face highly varied aerodynamic requirements, such as high manoeuvrability for flight among obstacles and high wind resistance for constant ground speed against strong headwinds that cannot all be optimally addressed by a single aerodynamic profile. Several bird species solve this problem by changing the shape of their wings to adapt to the different aerodynamic requirements. Here, we describe a novel morphing wing design composed of artificial feathers that can rapidly modify its geometry to fulfil different aerodynamic requirements. We show that a fully deployed config

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Mazhar, Farrukh, Mohammad A. Choudhry, and Muhammad Shehryar. "Nonlinear auto-regressive neural network for mathematical modelling of an airship using experimental data." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 233, no. 7 (2018): 2549–69. http://dx.doi.org/10.1177/0954410018783131.

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Autonomous flight of an aerial vehicle requires a sufficiently accurate mathematical model, which can capture system dynamics in the presence of external disturbances. Artificial neural network is known for ideal in capturing systems behaviour, where little knowledge about vehicle dynamics is available. In this paper, we explored this potential of artificial neural network for characterizing nonlinear dynamics of an unmanned airship. The flight experimentation data for an outdoor experimental airship are acquired through a series of pre-determined flight tests. The experimental data are subjec

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McIsaac, Hugh P., and Melvin L. Kreithen. "Attempts to condition homing pigeons to magnetic cues in an outdoor flight cage." Animal Learning & Behavior 15, no. 2 (1987): 118–23. http://dx.doi.org/10.3758/bf03204956.

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Wee, Inhwan, Dasol Lee, Taeyeon Kim, and David Hyunchul Shim. "Extension of Coordinate Systems and Outdoor Autonomous Swarming Flight using 130 Mini Quadrotors." Journal of Institute of Control, Robotics and Systems 25, no. 5 (2019): 431–37. http://dx.doi.org/10.5302/j.icros.2019.19.0043.

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Ang, Kevin Z. Y., Xiangxu Dong, Wenqi Liu, et al. "High-Precision Multi-UAV Teaming for the First Outdoor Night Show in Singapore." Unmanned Systems 06, no. 01 (2018): 39–65. http://dx.doi.org/10.1142/s2301385018500036.

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Advancement in the development of automation in aerial robotics has created endless applications today by utilizing autonomous drones, or in other words, unmanned aerial vehicles (UAVs). Motivated by the idea of the entertainment robots, in this paper, we present a robust and safe multi-UAV formation system for the purpose of entertainment in the form of a night multi-UAV teaming light show. The performance includes a 5-minutes flight show with 16 UAVs, changing patterns with background music, and with synchronized visual lighting from each of the UAVs. The high-precision autonomous formation

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Gill, Rajan, and Raffaello D’Andrea. "An Annular Wing VTOL UAV: Flight Dynamics and Control." Drones 4, no. 2 (2020): 14. http://dx.doi.org/10.3390/drones4020014.

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A vertical takeoff and landing, unmanned aerial vehicle is presented that features a quadrotor design for propulsion and attitude stabilization, and an annular wing that provides lift in forward flight. The annular wing enhances human safety by enshrouding the propeller blades. Both the annular wing and the propulsion units are fully characterized in forward flight via wind tunnel experiments. An autonomous control system is synthesized that is based on model inversion, and accounts for the aerodynamics of the wing. It also accounts for the dominant aerodynamics of the propellers in forward fl

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Norrefeldt, Victor, Florian Mayer, Britta Herbig, Ria Ströhlein, Pawel Wargocki, and Fang Lei. "Effect of Increased Cabin Recirculation Airflow Fraction on Relative Humidity, CO2 and TVOC." Aerospace 8, no. 1 (2021): 15. http://dx.doi.org/10.3390/aerospace8010015.

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In the CleanSky 2 ComAir study, subject tests were conducted in the Fraunhofer Flight Test Facility cabin mock-up. This mock-up consists of the front section of a former in-service A310 hosting up to 80 passengers. In 12 sessions the outdoor/recirculation airflow ratio was altered from today’s typically applied fractions to up to 88% recirculation fraction. This leads to increased relative humidity, carbon dioxide (CO2) and Total Volatile Organic Compounds (TVOC) levels in the cabin air, as the emissions by passengers become less diluted by outdoor, dry air. This paper describes the measured i

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Woodman, Constance, Chris Biro, and Donald J. Brightsmith. "Parrot Free-Flight as a Conservation Tool." Diversity 13, no. 6 (2021): 254. http://dx.doi.org/10.3390/d13060254.

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The release of captive-raised parrots to create or supplement wild populations has been critiqued due to variable survival rates and unreliable flocking behavior. Private bird owners free-fly their parrots in outdoor environments and utilize techniques that could address the needs of conservation breed and release projects. We present methods and results of a free-flight training technique used for 3 parrot flocks: A large-bodied (8 macaws of 3 species and 2 hybrids), small-bodied (25 individuals of 4 species), and a Sun Parakeet flock (4 individuals of 1 species). Obtained as chicks, the bird

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Abdul-Samed, Baqir, and Ammar Aldair. "Outdoor & Indoor Quadrotor Mission." 3D SCEEER Conference sceeer, no. 3d (2020): 1–12. http://dx.doi.org/10.37917/ijeee.sceeer.3rd.01.

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The last few years Quadrotor became an important topic, many researches have implemented and tested concerning that topic. Quadrotor also called an unmanned Aerial Vehicle (UAV), it's highly used in many applications like security, civil applications, aid, rescue and a lot of other applications. It’s not a conventional helicopter because of small size, low cost and the ability of vertical and takeoff landing (VTOL). The models kept an eye on quadrotors were presented, the advancement of this new kind of air vehicle is hindered for a very long while because of different reasons, for example, me

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Lebeau, Julie, Renate A. Wesselingh, and Hans Van Dyck. "Nectar resource limitation affects butterfly flight performance and metabolism differently in intensive and extensive agricultural landscapes." Proceedings of the Royal Society B: Biological Sciences 283, no. 1830 (2016): 20160455. http://dx.doi.org/10.1098/rspb.2016.0455.

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Flight is an essential biological ability of many insects, but is energetically costly. Environments under rapid human-induced change are characterized by habitat fragmentation and may impose constraints on the energy income budget of organisms. This may, in turn, affect locomotor performance and willingness to fly. We tested flight performance and metabolic rates in meadow brown butterflies ( Maniola jurtina ) of two contrasted agricultural landscapes: intensively managed, nectar-poor (IL) versus extensively managed, nectar-rich landscapes (EL). Young female adults were submitted to four nect

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MIZOTA, Taketo, SUNGMIN Park, Takeshi NARUO, and Tomokazu FUKAMACHI. "3-D flight formulation of golf ball under atmospheric boundary layer and outdoor experiment." Proceedings of the Fluids engineering conference 2004 (2004): 219. http://dx.doi.org/10.1299/jsmefed.2004.219.

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Boeddeker, N., J. P. Lindemann, M. Egelhaaf, and J. Zeil. "Responses of blowfly motion-sensitive neurons to reconstructed optic flow along outdoor flight paths." Journal of Comparative Physiology A 191, no. 12 (2005): 1143–55. http://dx.doi.org/10.1007/s00359-005-0038-9.

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Joshi, Apurva, Ankit Wala, Mohit Ludhiyani, Debraj Chakraborty, Hoam Chung, and D. Manjunath. "Outdoor cooperative flight using decentralized consensus algorithm and a guaranteed real-time communication protocol." Control Engineering Practice 88 (July 2019): 128–40. http://dx.doi.org/10.1016/j.conengprac.2019.05.002.

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Hou, Jie, Baolong Guo, Juanjuan Zhu, Cheng Li, and Wangpeng He. "Quadcopter localization and health monitoring method based on multiple virtual silhouette sensor integration." International Journal of Distributed Sensor Networks 13, no. 7 (2017): 155014771771982. http://dx.doi.org/10.1177/1550147717719826.

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With the widespread deployment of quadcopters, the flight safety issue attracts increasingly public and academic attentions. This article presents a quadcopter flight regime extraction algorithm for quadcopter localization and health monitoring using imageries captured by general purpose monocular cameras. First, contour information is extracted from quadcopter shadows on the ground. In order to better illustrate the three-dimensional silhouette information contained in shadow contour on the ground, a virtual sensor named Shadow Projection Tunnel is designed. Then, multiple Shadow Projection T

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Liu, Xuancen, Yueneng Yang, Chenxiang Ma, Jie Li, and Shifeng Zhang. "Real-Time Visual Tracking of Moving Targets Using a Low-Cost Unmanned Aerial Vehicle with a 3-Axis Stabilized Gimbal System." Applied Sciences 10, no. 15 (2020): 5064. http://dx.doi.org/10.3390/app10155064.

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Unmanned Aerial Vehicles (UAVs) have recently shown great performance collecting visual data through autonomous exploration and mapping, which are widely used in reconnaissance, surveillance, and target acquisition (RSTA) applications. In this paper, we present an onboard vision-based system for low-cost UAVs to autonomously track a moving target. Real-time visual tracking is achieved by using an object detection algorithm based on the Kernelized Correlation Filter (KCF) tracker. A 3-axis gimbaled camera with separate Inertial Measurement Unit (IMU) is used to aim at the selected target during

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Candan, Can, Mehmet Tiken, Halil Berberoglu, Elif Orhan, and Aydin Yeniay. "Experimental Study on Km-Range Long-Distance Measurement Using Silicon Photomultiplier Sensor with Low Peak Power Laser Pulse." Applied Sciences 11, no. 1 (2021): 403. http://dx.doi.org/10.3390/app11010403.

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Silicon photomultipliers (SiPM) have drawn considerable attention due to their superior sensitivity with a multi-pixel matrix structure. SiPM can be the choice of a detector for time of flight measurement which is one of the most promising applications in the field of light detection and ranging (LiDAR). In this work, we take advantage of SiPM and attempt to measure longer distances with a low peak power semiconductor laser under outdoor sunny and windy conditions. We achieved a long detection range of a few kilometers by using SiPM and a laser with a pulse energy of 9 µj at 0.905 µm and 3 dB

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McIsaac, H. P., and M. L. Kreithen. "Erratum to: Attempts to condition homing pigeons to magnetic cues in an outdoor flight cage." Animal Learning & Behavior 15, no. 3 (1987): 326. http://dx.doi.org/10.3758/bf03205026.

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Bentz, J. W. G., J. Goschnick, J. Schuricht, H. J. Ache, J. Zehnpfennig, and A. Benninghoven. "Analysis and classification of individual outdoor aerosol particles with SIMS time-of-flight mass spectrometry." Fresenius' Journal of Analytical Chemistry 353, no. 5-8 (1995): 603–8. http://dx.doi.org/10.1007/bf00321333.

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Lee, Sanggwon, Keita Yasutomi, Masato Morita, Hodaka Kawanishi, and Shoji Kawahito. "A Time-of-Flight Range Sensor Using Four-Tap Lock-In Pixels with High near Infrared Sensitivity for LiDAR Applications." Sensors 20, no. 1 (2019): 116. http://dx.doi.org/10.3390/s20010116.

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In this paper, a back-illuminated (BSI) time-of-flight (TOF) sensor using 0.2 µm silicon-on-insulator (SOI) complementary metal oxide semiconductor (CMOS) technology is developed for long-range laser imaging detection and ranging (LiDAR) application. A 200 µm-thick bulk silicon in the SOI substrate is fully depleted by applying high negative voltage at the backside for higher quantum efficiency (QE) in a near-infrared (NIR) region. The proposed SOI-based four-tap charge modulator achieves a high-speed charge modulation and high modulation contrast of 71% in a NIR region. In addition, in-pixel

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Martinez, Pablo, and Martin Barczyk. "Implementation and optimization of the cascade classifier algorithm for UAV detection and tracking." Journal of Unmanned Vehicle Systems 7, no. 4 (2019): 296–311. http://dx.doi.org/10.1139/juvs-2018-0033.

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A number of vision-based algorithms designed to detect and track unmanned aerial vehicles (UAVs) from on board a second UAV have been researched, implemented, and experimentally validated over the last decade. However, the successful methods have tended to rely on characteristics such as color or shape, meaning they require the target UAV to have particular markings or geometries. This paper uses the Viola–Jones cascade classifier, a computer vision algorithm originally designed to detect human faces in video streams, and demonstrates its capability for detecting and tracking an arbitrary type

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Maciel-Pearson, Bruna G., Samet Akcay, Amir Atapour-Abarghouei, Christopher Holder, and Toby P. Breckon. "Multi-Task Regression-Based Learning for Autonomous Unmanned Aerial Vehicle Flight Control Within Unstructured Outdoor Environments." IEEE Robotics and Automation Letters 4, no. 4 (2019): 4116–23. http://dx.doi.org/10.1109/lra.2019.2930496.

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Yang, Yi, Wei Wang, Daisuke Iwakura, Akio Namiki, and Kenzo Nonami. "Sliding Mode Control for Hexacopter Stabilization with Motor Failure." Journal of Robotics and Mechatronics 28, no. 6 (2016): 936–48. http://dx.doi.org/10.20965/jrm.2016.p0936.

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[abstFig src='/00280006/18.jpg' width='300' text='Hovering with 5 rotors' ] This study presents a fault-tolerance approach for hexacopters with failed propulsion systems (i.e., motors and propellers) using sliding mode control theory. In this study, we use an explicit control allocation method with linear constraints for allocating the control input to redundancy actuators, as well as a new sliding model controller designed to stabilize the attitude and maintain the basic flight performance of a vehicle with a single failed motor during an outdoor autonomous flight mission. An asymmetrical mot

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Sabikan, Sulaiman Bin, Nawawi S. W, and NAA Aziz. "Modelling of time-to collision for unmanned aerial vehicle using particles swarm optimization." IAES International Journal of Artificial Intelligence (IJ-AI) 9, no. 3 (2020): 488. http://dx.doi.org/10.11591/ijai.v9.i3.pp488-496.

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A method for the development of Time-to-Collision (TTC) mathematical model for outdoor Unmanned Aerial Vehicle (UAV) using Particles Swarm Optimization (PSO), are presented. TTC is the time required for a UAV either to collide with any static obstacle or completely stop without applying any braking control system when the throttle is fully released. This model provides predictions of time before UAV will collide with the obstacle in the same path based on their parameter, for instance, current speed and payload. However, this paper focus on the methodology of the implementation of PSO to devel

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Wildmann, N., S. Ravi, and J. Bange. "Towards higher accuracy and better frequency response with standard multi-hole probes in turbulence measurement with remotely piloted aircraft (RPA)." Atmospheric Measurement Techniques 7, no. 4 (2014): 1027–41. http://dx.doi.org/10.5194/amt-7-1027-2014.

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Abstract. This study deals with the problem of turbulence measurement with small remotely piloted aircraft (RPA). It shows how multi-hole probes (MHPs) can be used to measure fluctuating parts of the airflow in flight up to 20 Hz. Accurate measurement of the transient wind in the outdoor environment is needed for the estimation of the 3-D wind vector as well as turbulent fluxes of heat, momentum, water vapour, etc. In comparison to an established MHP system, experiments were done to show how developments of the system setup can improve data quality. The study includes a re-evaluation of the pn

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