Spatially Distributed Wind and Turbulence Measurements with a Fleet of Unmanned Aerial Systems PDF Download
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Author: Tamino Wetz
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: Tamino Wetz
Publisher:
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Category :
Languages : en
Pages : 0
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Author: Sara Alaoui-Sosse
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
The development of unmanned aerial vehicles (UAVs) for atmospheric research during the last years undergoes a remarkable growth all over the world due to their several advantages. They are a new tool for profiling the main parameters of the atmospheric boundary layer (ABL) such as temperature, humidity and wind vector, as well as for turbulence observations. Their development was inspired by instrumented airplanes. In addition, they are complementary to other existing platforms such as instrumented towers and airplanes, and radiosondes, since they can fly in areas unreachable by these other platforms. We have developed two instrumentation packages for wind and turbulence observations in the atmospheric boundary layer for two UAVs of distinct sizes. The first one is a small size UAV (3.5 kg payload included and with a wingspan of 2.6 m) called OVLI-TA (Objet Volant Leger Instrumenté-Turbulence Atmosphérique). The second one is the fixed wing UAV called BOREAL which has a larger size (25 kg including a payload of 5 kg and with a wingspan of 4.2 m).The meteorological instrumental package of OVLI-TA is composed of a five-hole probe that replaces the nose of the drone, a Pitot probe to measure static and dynamic pressure, a fast inertial measurement unit, a GPS receiver, as well as temperature and moisture sensors. Moreover, for autonomous flights the Pixhawk autopilot is used. The wind tunnel calibrations of the five-hole probe were conducted in order to determine the calibration coefficients of the angles of attack and sideslip. I present the analysis of a qualification flight test conducted in March 2016 in Lannemezan, in the atmospheric research center (CRA) equipped with an instrumented 60 m tower, as well as of the flights conducted in June and July 2016 during the international project DACCIWA (Dynamics-Aerosol-Chemistry-Clouds Interactions in West Africa), in Benin. This study allows evaluating the capacity and performances of OVLI-TA to measure mean values of wind, temperature and humidity, along with turbulence. In this assessment, observations from the 60 m tower and radiosondes were used as a reference.BOREAL's advantages over OVLI-TA lie in its larger payload capacity, its flight endurance that could reach 9 hours, and also its ability to fly in more adverse weather conditions. The developed instrumentation includes a GPS-IMU platform, a five-hole probe replacing the nose of the UAV which measures the angles of attack and sideslip, a Pitot tube, in addition to temperature and humidity sensors. In order to calibrate the five-hole probe, I analyzed the data of wind tunnel test and I used FLUENT software for computational fluid dynamics (CFD) simulations. Furthermore, the first qualification flight test conducted in 2018 allowed us to determine the optimal airspeed of the UAV at which the vibrations are significantly reduced to an acceptable level. Subsequently, in 2020, a first campaign was carried out in Lannemezan in order to qualify the BOREAL capacities to measure wind and turbulence and this following comparisons with the instrumented tower. The UAV's performances are presented in details.
Author: Thomas Spieß
Publisher:
ISBN: 9783832256425
Category :
Languages : en
Pages : 120
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Author: H. P. Fimpel
Publisher:
ISBN:
Category : Atmospheric turbulence
Languages : en
Pages : 102
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Author:
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Category :
Languages : en
Pages :
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Author: Carbajo Fuertes. Fernando
Publisher:
ISBN:
Category :
Languages : en
Pages : 95
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Book Description
Mots-clés de l'auteur: Wind energy ; turbulence ; LiDAR ; fluid mechanics ; wind turbine wake ; remote sensing ; atmospheric boundary layer ; drone ; UAV.
Author: R. H. Palmer
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Anis Koubaa
Publisher: Academic Press
ISBN: 0128202777
Category : Technology & Engineering
Languages : en
Pages : 652
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Book Description
Unmanned Aerial Systems: Theoretical Foundation and Applications presents some of the latest innovative approaches to drones from the point-of-view of dynamic modeling, system analysis, optimization, control, communications, 3D-mapping, search and rescue, surveillance, farmland and construction monitoring, and more. With the emergence of low-cost UAS, a vast array of research works in academia and products in the industrial sectors have evolved. The book covers the safe operation of UAS, including, but not limited to, fundamental design, mission and path planning, control theory, computer vision, artificial intelligence, applications requirements, and more. This book provides a unique reference of the state-of-the-art research and development of unmanned aerial systems, making it an essential resource for researchers, instructors and practitioners. Covers some of the most innovative approaches to drones Provides the latest state-of-the-art research and development surrounding unmanned aerial systems Presents a comprehensive reference on unmanned aerial systems, with a focus on cutting-edge technologies and recent research trends in the area
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309185564
Category : Science
Languages : en
Pages : 251
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Book Description
Detailed weather observations on local and regional levels are essential to a range of needs from forecasting tornadoes to making decisions that affect energy security, public health and safety, transportation, agriculture and all of our economic interests. As technological capabilities have become increasingly affordable, businesses, state and local governments, and individual weather enthusiasts have set up observing systems throughout the United States. However, because there is no national network tying many of these systems together, data collection methods are inconsistent and public accessibility is limited. This book identifies short-term and long-term goals for federal government sponsors and other public and private partners in establishing a coordinated nationwide "network of networks" of weather and climate observations.
Author: Roland Schmehl
Publisher: Springer
ISBN: 9811019479
Category : Technology & Engineering
Languages : en
Pages : 752
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Book Description
This book provides in-depth coverage of the latest research and development activities concerning innovative wind energy technologies intended to replace fossil fuels on an economical basis. A characteristic feature of the various conversion concepts discussed is the use of tethered flying devices to substantially reduce the material consumption per installed unit and to access wind energy at higher altitudes, where the wind is more consistent. The introductory chapter describes the emergence and economic dimension of airborne wind energy. Focusing on “Fundamentals, Modeling & Simulation”, Part I includes six contributions that describe quasi-steady as well as dynamic models and simulations of airborne wind energy systems or individual components. Shifting the spotlight to “Control, Optimization & Flight State Measurement”, Part II combines one chapter on measurement techniques with five chapters on control of kite and ground stations, and two chapters on optimization. Part III on “Concept Design & Analysis” includes three chapters that present and analyze novel harvesting concepts as well as two chapters on system component design. Part IV, which centers on “Implemented Concepts”, presents five chapters on established system concepts and one chapter about a subsystem for automatic launching and landing of kites. In closing, Part V focuses with four chapters on “Technology Deployment” related to market and financing strategies, as well as on regulation and the environment. The book builds on the success of the first volume “Airborne Wind Energy” (Springer, 2013), and offers a self-contained reference guide for researchers, scientists, professionals and students. The respective chapters were contributed by a broad variety of authors: academics, practicing engineers and inventors, all of whom are experts in their respective fields.
