Download or read book Vision based Emergency Landing of Small Unmanned Aircraft Systems cParker Chase Lusk written by Parker Chase Lusk and published by . This book was released on 2018 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents a machine vision-based approach to emergency landing for small unmanned aircraft systems. In the event of an emergency, the vehicle uses a pre-compiled database of potential landing sites to select the most accessible location to land based on vehicle health. Because it is impossible to know the current state of any ground environment, a camera is used for real-time visual feedback. Using the recently developed Recursive-RANSAC algorithm, an arbitrary number of moving ground obstacles can be visually detected and tracked. If obstacles are present in the selected ditch site, the emergency landing system chooses a new ditch site to mitigate risk. This system is called Safe2Ditch.
Download or read book Vision based Emergency Landing of Small Unmanned Aircraft Systems written by Parker Chase Lusk and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents a machine vision-based approach to emergency landing for small unmanned aircraft systems. In the event of an emergency, the vehicle uses a pre-compiled database of potential landing sites to select the most accessible location to land based on vehicle health. Because it is impossible to know the current state of any ground environment, a camera is used for real-time visual feedback. Using the recently developed Recursive-RANSAC algorithm, an arbitrary number of moving ground obstacles can be visually detected and tracked. If obstacles are present in the selected ditch site, the emergency landing system chooses a new ditch site to mitigate risk. This system is called Safe2Ditch.
Download or read book A Depth based Computer Vision Approach to Unmanned Aircraft System Landing with Optimal Positioning written by Nicholas Quatrociocchi and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "High traffic congestion in cities can lead to difficulties in delivering appropriate aid to people in need of emergency services. Developing an autonomous aerial medical evacuation system with the required size to facilitate the need can allow for the mitigation of the constraint. The aerial system must be capable of vertical takeoff and landing to reach highly conjected areas and areas where traditional aircraft cannot access. In general, the most challenging limitation within any proposed solution is the landing sequence. There have been several techniques developed over the years to land aircraft autonomously; however, very little attention has been scoped to operate strictly within highly congested urban-type environments. The goal of this research is to develop a possible solution to achieve autonomous landing based on computer vision-capture systems. For example, by utilizing modern computer vision approaches involving depth estimation through binocular stereo computer vision, a depth map can be developed. If the vision system is mounted to the bottom of an autonomous aerial system, it can represent the area below the aircraft and determine a possible landing zone. In this work, neural networks are used to isolate the ground via the computer vision height map. Then out of the entire visible ground area, a potential landing position can be estimated. An optimization routine is then developed to identify the most optimal landing position within the visible area. The optimization routine identifies the largest identifiable open area near the desired landing location. Web cameras were utilized and processed on a desktop to form a basis for the computer vision system. The algorithms were tested and verified using a simulation effort proving the feasibility of the approach. In addition, the system was tested on a scaled down city scene and was able to determine an optimal landing zone."--Abstract.
Download or read book Vision based Guidance for Air to air Tracking and Rendezvous of Unmanned Aircraft Systems written by Joseph W. Nichols and published by . This book was released on 2013 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analysis of the visual pursuit method is provided using the method of adjoints to evaluate the effects of airspeed, closing velocity, system time constant, sensor delay and target motion on docking performance. A method for predicting docking accuracy is developed and shown to be useful for predicting docking performance for small and large unmanned aircraft systems.
Download or read book History of the Genesee Country Western New York written by Lockwood Richard Doty and published by . This book was released on 1925 with total page 651 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Vision Based Navigation for Autonomous Landing of Unmanned Aerial Vehicles written by Paul A. Ghyzel and published by . This book was released on 2000-09-01 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: The role of Unmanned Aerial Vehicles (UAV) for modern military operations is expected to expand in the 21st Century, including increased deployment of UAVs from Navy ships at sea. Autonomous operation of UAVs from ships at sea requires the UAV to land on a moving ship using only passive sensors installed in the UAV. This thesis investigates the feasibility of using passive vision sensors installed in the UAV to estimate the UAV position relative to the moving platform. A navigation algorithm based on photogrammetry and perspective estimation is presented for numerically determining the relative position and orientation of an aircraft with respect to a ship that possesses three visibly significant points with known separation distances. Original image processing algorithms that reliably locate visually significant features in monochrome images are developed. Monochrome video imagery collected during flight test with an infrared video camera mounted in the nose of a UAV during actual landing approaches is presented. The navigation and image processing algorithms are combined to reduce the flight test images into vehicle position estimates. These position estimates are compared to truth data to demonstrate the feasibility of passive, vision-based sensors for aircraft navigation. Conclusions are drawn, and recommendations for further study are presented.
Download or read book A History of Old Kinderhook from Aboriginal Days to the Present Time written by Edward Augustus Collier and published by . This book was released on 1914 with total page 698 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Crime Book written by DK and published by Penguin. This book was released on 2021-02-02 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: Investigate 100 of the world's most notorious crimes, including the Great Train Robbery, the Lindbergh kidnapping, and the murders of serial killer Jeffrey Dahmer. Were the perpetrators delusional, opportunist, or truly evil? Find out what really happened and how the cases were solved. Discover conmen with sheer verve, such as Victor Lustig who "sold" the Eiffel Tower to scrap dealers in 1925, adrenaline-fuelled escapes, and mind-bending exploits of pirates, kidnappers, and drug cartels. The Crime Book demystifies malware, cybercrimes, and Ponzi schemes and sets out the terrifying ploys of mass murderers from 16th-century Elizabeth Báthory who drained young girls' blood to the more recent exploits of Rosemary and Fred West. Like a virus, crime mutates and adapts. The Crime Book explains how pivotal moments in history opened up new opportunities for criminals, such as the smuggling of alcohol during the American Prohibition era. It also charts developments in justice and forensics including the Innocence Project, which used DNA testing to exonerate wrongly convicted convicts. It examines how the forces of law and order have fought back against crime, explaining ingenious sting operations such as tracking down the jewel thief Bill Mason and the final capture of murderer Ted Bundy. With a foreword from bestselling crime author Cathy Scott, The Crime Book is an enthralling introduction to humanity's darker side. Series Overview: Big Ideas Simply Explained series uses creative design and innovative graphics, along with straightforward and engaging writing, to make complex subjects easier to understand. These award-winning books provide just the information needed for students, families, or anyone interested in concise, thought-provoking refreshers on a single subject.
Download or read book The American Indian in the United States Period 1850 1914 written by Warren King Moorehead and published by Andover, Mass. : Andover Press. This book was released on 1914 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present condition of the American Indian; his political history and other topics; a plea for justice.
Download or read book History of Wyoming County N Y written by and published by . This book was released on 1880 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Stone Age in North America written by Warren King Moorehead and published by . This book was released on 1910 with total page 527 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Portable Life Support Systems written by and published by . This book was released on 1970 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Fireman s Flame written by Richard Lewine and published by Samuel French, Inc.. This book was released on 1966 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Morris V Jenkins written by and published by . This book was released on 1985 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Our Highland Home written by Member of the National Health Society and published by . This book was released on 1883 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book History of Gallatin Saline Hamilton Franklin and Williamson Counties Illinois from the Earliest Time to the Present written by Anonymous and published by Franklin Classics Trade Press. This book was released on 2018-11-08 with total page 964 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Download or read book Limnogeology Progress Challenges and Opportunities written by Michael R. Rosen and published by Springer Nature. This book was released on 2021-04-24 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book honors the career of Professor Elizabeth Gierlowski-Kordesch who was a pioneer and leader in the field of limnogeology since the 1980s. Her work was instrumental in guiding students and professionals in the field until her untimely death in 2016. This collection of chapters was written by her colleagues and students and recognize the important role that Professor Gierlowski-Kordesch had in advancing the field of limnogeology. The chapters show the breadth of her reach as these have been contributed from virtually every continent. This book will be a primary reference for scientists, professionals and graduate students who are interested in the latest advances in limnogeologic processes and basin descriptions in North and South America, Europe, Africa, and China. *Free supplementary material available online for chapters 3,11,12 and 13. Access by searching for the book on link.springer.com
