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122 result(s) for "PILOTLESS AIRCRAFT"
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Unmanned aircraft systems
Aerospace Series List; Title Page; Copyright; Dedication; Foreword; Units and Abbreviations; 1: Introduction to Unmanned Aircraft Systems (UAS); 1.1 Some Applications of UAS; 1.2 What are UAS?; 1.3 Why Unmanned Aircraft?; 1.4 The Systemic Basis of UAS; 1.5 System Composition; References; Part One: THE DESIGN OF UAV SYSTEMS; 2: Introduction to Design and Selection of the System; 2.1 Conceptual Phase; 2.2 Preliminary Design; 2.3 Detail Design; 2.4 Selection of the System; 3: Aerodynamics and Airframe Configurations; 3.1 Lift-induced Drag; 3.2 Parasitic Drag; 3.3 Rotary-wing Aerodynamics.
The Droner's Manual
This is not AI-generated content. The contents were written and verified by subject matter experts from Aviation Supplies & Academics, an 85-year-old aviation company. Look for the ASA wings to ensure you are purchasing a reliable publication. The incredible advancements in the field of uncrewed aircraft over the last decade have made it possible for almost anyone to build and operate their own drone, creating exciting business opportunities in numerous fields ranging from video production to agriculture. However, many beginners and even more experienced hobbyists find these ventures daunting because reliable information for construction and programming of uncrewed aircraft is often scattered across various sources, and the industry is still establishing standards for safe and efficient operation of UAVs. The Droner's Manual compiles the most important and relevant knowledge into a guide for both beginner and experienced operators. With his expertise as a UAV operator for government, industry, and hobby uses, author Kevin Jenkins offers step-by-step guidance to build, program, test, and fly multicopter, fixed-wing, and hybrid airframe aircraft for a variety of purposes. This comprehensive manual covers uncrewed system components, aircraft set up, flight controller fundamentals and failsafe features, the flight-testing process, and flight operations. The second edition incorporates regulation exceptions for recreational flying and introduces The Recreational UAS Safety Test (TRUST), as well as offering new and updated information on smart batteries, solving GPS complications, drone photography, remote identification requirements, and the concepts of PID tuning. More than 70 illustrations provide detailed schematics and diagrams for the construction of complex systems such as first-person view (FPV) and imaging payloads. You will fly with confidence applying this book's direction on mission planning, checklists, and safe flight operations. Whether you use it to build your first unmanned aircraft or as a handy reference in the field, The Droner's Manual is essential for drone builders, pilots, and operators. Important note from the publisher: While AI-generated content can be helpful to identify resources for ongoing study, it is not a reliable resource for learning critical, safety-dependent topics such as aviation. AI content is sterile, often lacks important context, and is at risk of errors. ASA publishes only human-generated content to ensure it is accurate, reliable, comprehensive, and presented in context—so you can become a safe and effective aviator.
UAVs to Monitor and Manage Sugarcane: Integrative Review
Pilotless aircraft systems will reshape our critical thinking about agriculture. Furthermore, because they can drive a transformative precision and digital farming, we authoritatively review the contemporary academic literature on UAVs from every angle imaginable for remote sensing and on-field management, particularly for sugarcane. We focus our search on the period of 2016–2021 to refer to the broadest bibliometric collection, from the emergence of the term “UAV” in the typical literature on sugarcane to the latest year of complete publication. UAVs are capable of navigating throughout the field both autonomously and semi-autonomously at the control of an assistant operator. They prove useful to remotely capture the spatial-temporal variability with pinpoint accuracy. Thereby, they can enable the stakeholder to make early-stage decisions at the right time and place, whether for mapping, re-planting, or fertilizing areas producing feedstock for food and bioenergy. Most excitingly, they are flexible. Hence, we can strategically explore them to spray active ingredients and spread entomopathogenic bioagents (e.g., Cotesia flavipes and Thricrogramma spp.) onto the field wherever they need to be in order to suppress economically relevant pests (e.g., Diatraea saccharalis, Mahanarva fimbriolata, sugarcane mosaic virus, and weeds) more precisely and environmentally responsibly than what is possible with traditional approaches (without the need to heavily traffic and touch the object). Plainly, this means that insights into ramifications of our integrative review are timely. They will provide knowledge to progress the field’s prominence in operating flying machines to level up the cost-effectiveness of producing sugarcane towards solving the sector’s greatest challenges ahead, such as achieving food and energy security in order to thrive in an ever-challenging world.
A coaxial alignment method for large aircraft component assembly using distributed monocular vision
PurposeThe assembly of large component in out-field is an important part for the usage and maintenance of aircrafts, which is mostly manually accomplished at present, as the commonly used large-volume measurement systems are usually inapplicable. This paper aims to propose a novel coaxial alignment method for large aircraft component assembly using distributed monocular vision.Design/methodology/approachFor each of the mating holes on the components, a monocular vision module is applied to measure the poses of holes, which together shape a distributed monocular vision system. A new unconstrained hole pose optimization model is developed considering the complicated wearing on hole edges, and it is solved by a iterative reweighted particle swarm optimization (IR-PSO) method. Based on the obtained poses of holes, a Plücker line coordinates-based method is proposed for the relative posture evaluation between the components, and the analytical solution of posture parameters is derived. The required movements for coaxial alignment are finally calculated using the kinematics model of parallel mechanism.FindingsThe IR-PSO method derived more accurate hole pose arguments than the state-of-the-art method under complicated wearing situation of holes, and is much more efficient due to the elimination of constraints. The accuracy of the Plücker line coordinates-based relative posture evaluation (PRPE) method is competitive with the singular value decomposition (SVD) method, but it does not rely on the corresponding of point set; thus, it is more appropriate for coaxial alignment.Practical implicationsAn automatic coaxial alignment system (ACAS) has been developed for the assembly of a large pilotless aircraft, and a coaxial error of 0.04 mm is realized.Originality/valueThe IR-PSO method can be applied for pose optimization of other cylindrical object, and the analytical solution of Plücker line coordinates-based axes registration is derived for the first time.
One Nation under Drones
One Nation Under Drones is an interesting and informative review of how robotic and unmanned systems are impacting every aspect of American life, from how we fight our wars; to how we play; to how we grow our food.Edited by Professor John Jackson, who holds the E.A.
Planetary Exploration with Ingenuity and Dragonfly
Planetary Exploration with Ingenuity and Dragonfly aims to lay out to 'space people' what they need to know about rotorcraft, and to 'helicopter people' what they need to know about delivering flying machines through space and operating them on other planets.
Hazard Avoidance Products for Convectively-Induced Turbulence in Support of High-Altitude Global Hawk Aircraft Missions
A combination of satellite-based and ground-based information is used to identify regions of intense convection that may act as a hazard to high-altitude aircraft. Motivated by concerns that Global Hawk pilotless aircraft, flying near 60,000 feet, might encounter significant convectively-induced turbulence during research overflights of tropical cyclones, strict rules were put in place to avoid such hazards. However, these rules put constraints on science missions focused on sampling convection with onboard sensors. To address these concerns, three hazard avoidance tools to aid in real-time mission decision support are used to more precisely identify areas of potential turbulence: Satellite-derived Cloud-top height and tropical overshooting tops, and ground-based global network lightning flashes. These tools are used to compare an ER-2 aircraft overflight of tropical cyclone Emily in 2005, which experienced severe turbulence, to Global Hawk overflights of tropical cyclones Karl and Matthew in 2010 that experienced no turbulence. It is found that the ER-2 overflew the lowest cloud tops and had the largest vertical separation from them compared to the Global Hawk flights. Therefore, cold cloud tops alone cannot predict turbulence. Unlike the overflights of Matthew and Karl, Emily exhibited multiple lightning flashes and a distinct overshooting top coincident with the observed turbulence. Therefore, these tools in tandem can better assist in identifying likely regions/periods of intense active convection. The primary outcome of this study is an altering of the Global Hawk overflight rules to be more flexible based on the analyzed conditions.