Atmospheric Considerations for Uninhabited Aerial Vehicle (UAV) Flight Test Planning PDF Download
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Category :
Languages : en
Pages : 20
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Author:
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ISBN:
Category :
Languages : en
Pages : 20
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Author: Edward H. Teets
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 12
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Book Description
Atmospheric considerations are a key element in support of uninhabited aerial vehicle (UAV) flight testing. The local atmospheric environment (wind speed and direction, wind shear, temperature, precipitation, and turbulence) must be characterized and understood. The primary objective is to ensure safety of the vehicle, test range, and ground assets. The generalized atmospheric behavior for any potential flight operations site is best described by combining the local seasonal climatology, daily upper atmospheric wind and temperature profiles, and hourly surface and low-level wind observations. This paper describes a continuous forecast update process based on monitoring atmospheric turbulence with surface and low-level wind for the support of UAV flights. Updates ensure the most current available data needed for mission planning. Each mission plan is developed so as not to exceed operation limits because of weather conditions. This paper also discusses climatology, weather forecasts, and day-of-flight weather monitoring for planning of uninhabited aerial vehicle missions.
Author: Edward H. Teets
Publisher:
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Category :
Languages : en
Pages :
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Author: Marcelo I. Guzman
Publisher: MDPI
ISBN: 3039439855
Category : Science
Languages : en
Pages : 248
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Book Description
This book is the first literature collection focused on the development and implementation of unmanned aircraft systems (UAS) and their integration with sensors for atmospheric measurements on Earth. The research covered in the book combines chemical, physical, and meteorological measurements performed in field campaigns, as well as conceptual and laboratory work. Useful examples for the development of platforms and autonomous systems for environmental studies are provided, which demonstrate how careful the operation of sensors aboard UAS must be to gather information for remote sensing in the atmosphere. The work serves as a key collection of articles to introduce the topic to new researchers interested in the field, guide future studies, and motivate measurements to improve our understanding of the Earth’s complex atmosphere.
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Languages : en
Pages :
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The purpose of this paper is to examine the applicability of established manned aircraft test techniques and processes to the testing of Unmanned Aerial Vehicles (UAVs). While the paper is largely focused on the Naval Aviation perspective, input from several joint programs as well as some Air Force and Army testing is included. In addition, although handled differently, the testing of the Tomahawk Cruise Missile is also considered. Processes associated with test planning, risk mitigation and airworthiness are considered in some detail. Much of this document is drawn from UAV flight test experience compiled in a draft Advisory Group for Aerospace Research and Development (AGARD) paper for the North Atlantic Treaty Organization (NATO) paper by the author. Given the enormous range in size, speed, and complexity of UAV systems examined, it is not surprising to find that numerous conclusions can be drawn. This paper attempts to categorize both the air vehicles and their associated systems to facilitate the analysis. There are many standard flight test techniques that can easily be applied to UAV systems with excellent results. The same is true of many of the processes associated with flight test planning and execution. However, it is also evident that it is beneficial and in many cases necessary to adapt, or tailor, both the techniques and the processes to efficiently test a given system. A prime example of modifying test techniques is evident with many of the smaller systems that cannot support the type of instrumentation normally associated with manned aircraft flight test. Similarly, with respect to processes, airworthiness requirements often need to be tailored in consideration of the actual risk, cost, capability and benefit provided by the system. By definition, testing of an unmanned vehicle presents no risk to the pilot/operator. If control by fail-safe, or flight termination device can eliminate risk to property, the robustness of the design can be far below what may be considered acceptable for a manned aircraft, without creating significant safety issues. Recommendations include process improvements to permit UAV programs to evolve without excessive restrictions based on manned aircraft requirements. These processes should be based on system's characteristics and an assessment of the risks associated with the test and mission constraints of the system. Adaptation of evolving technology may be used to further refine and improve existing flight test techniques for UAV systems. Further research is recommended in the form of a statistical study of total UAV and cruise missile flight test mishaps, fatalities, and property damage as a function of total flight hours to validate the risk level and support process improvement.
Author: Robert R. Hoffman
Publisher: Psychology Press
ISBN: 1136679634
Category : Business & Economics
Languages : en
Pages : 541
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Book Description
Researchers have revealed that real expertise, while applied to well-defined tasks with highly circumscribed contexts, often stretches beyond its routine boundaries. For example, a medical doctor may be called upon to diagnose a rare disease or perform emergency surgery outside his or her area of specialization because other experts are not availab
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Category : Government publications
Languages : en
Pages : 1144
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Author:
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ISBN:
Category :
Languages : en
Pages : 80
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Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 980
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Book Description
Two-volume collection of case studies on aspects of NACA-NASA research by noted engineers, airmen, historians, museum curators, journalists, and independent scholars. Explores various aspects of how NACA-NASA research took aeronautics from the subsonic to the hypersonic era.-publisher description.
Author: Alejandro Sobron
Publisher: Linköping University Electronic Press
ISBN: 9176852202
Category :
Languages : en
Pages : 112
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Book Description
Downscaled physical models, also referred to as subscale models, have played an essential role in the investigation of the complex physics of flight until the recent disruption of numerical simulation. Despite the fact that improvements in computational methods are slowly pushing experimental techniques towards a secondary role as verification or calibration tools, real-world testing of physical prototypes still provides an unmatched confidence. Physical models are very effective at revealing issues that are sometimes not correctly identified in the virtual domain, and hence can be a valuable complement to other design tools. But traditional wind-tunnel testing cannot always meet all of the requirements of modern aeronautical research and development. It is nowadays too expensive to use these scarce facilities to explore different design iterations during the initial stages of aircraft development, or to experiment with new and immature technologies. Testing of free-flight subscale models, referred to as Subscale Flight Testing (SFT), could offer an affordable and low-risk alternative for complementing conventional techniques with both qualitative and quantitative information. The miniaturisation of mechatronic systems, the advances in rapid-prototyping techniques and power storage, as well as new manufacturing methods, currently enable the development of sophisticated test objects at scales that were impractical some decades ago. Moreover, the recent boom in the commercial drone industry has driven a quick development of specialised electronics and sensors, which offer nowadays surprising capabilities at competitive prices. These recent technological disruptions have significantly altered the cost-benefit function of SFT and it is necessary to re-evaluate its potential in the contemporary aircraft development context. This thesis aims to increase the comprehension and knowledge of the SFT method in order to define a practical framework for its use in aircraft design; focusing on low-cost, short-time solutions that don’t require more than a small organization and few resources. This objective is approached from a theoretical point of view by means of an analysis of the physical and practical limitations of the scaling laws; and from an empirical point of view by means of field experiments aimed at identifying practical needs for equipment, methods, and tools. A low-cost data acquisition system is developed and tested; a novel method for semi-automated flight testing in small airspaces is proposed; a set of tools for analysis and visualisation of flight data is presented; and it is also demonstrated that it is possible to explore and demonstrate new technology using SFT with a very limited amount of economic and human resources. All these, together with a theoretical review and contextualisation, contribute to increasing the comprehension and knowledge of the SFT method in general, and its potential applications in aircraft conceptual design in particular.
