Download or read book Enabling Efficient Vertical Takeoff landing and Forward Flight of Unmanned Aerial Vehicles written by Peter Timothy Mancuso and published by . This book was released on 2015 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fixed-wing unmanned aerial vehicles (UAVs) that offer vertical takeoff and landing (VTOL) and forward flight capability suffer from sub-par performance in both flight modes. Achieving the next generation of efficient hybrid aircraft requires innovations in: (i) power management, (ii) efficient structures, and (iii) control methodologies. Existing hybrid UAVs generally utilize one of three transitioning mechanisms: an external power mechanism to tilt the rotor-propulsion pod, separate propulsion units and rotors during hover and forward flight, or tilt body craft (smaller scale). Thus, hybrid concepts require more energy compared to dedicated fixed-wing or rotorcraft UAVs. Moreover, design trade-offs to reinforce the wing structure (typically to accommodate the propulsion systems and enable hover, i.e. tilt-rotor concepts) adversely impacts the aerodynamics, controllability and efficiency of the aircraft in both hover and forward flight modes. The goal of this research is to develop more efficient VTOL/ hover and forward flight UAVs. In doing so, the transition sequence, transition mechanism, and actuator performance are heavily considered. A design and control methodology was implemented to address these issues through a series of computer simulations and prototype benchtop tests to verify the proposed solution. Finally, preliminary field testing with a first-generation prototype was conducted. The methods used in this research offer guidelines and a new dual-arm rotor UAV concept to designing more efficient hybrid UAVs in both hover and forward flight.

Download or read book Aggressive Landing Maneuvers for UAVs written by Selcuk Bayraktar and published by . This book was released on 2006 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: VTOL (Vertical Take Off and Landing) vehicle landing is considered to be a critically difficult task for both land, marine, and urban operations. This thesis describes one possible control approach to enable landing of unmanned aircraft systems at all attitudes, including against walls and ceilings as a way to considerably enhance the operational capability of these vehicles. The features of the research include a novel approach to trajectory tracking, whereby the primary system outputs to be tracked are smoothly scheduled according to the state of the vehicle relative to its landing area. The proposed approach is illustrated with several experiments using a low-cost three-degree-of-freedom helicopter. We also include the design details of a testbed for the demonstration of the application of our research endeavor. The testbed is a model helicopter UAV platform that has indoor and outdoor aggressive flight capability.

Download or read book Vertical Takeoff and Landing Aircraft written by John Paul Campbell and published by . This book was released on 1962 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design Fabrication and Test of a Vertical Attitude Takeoff and Landing Unmanned Air Vehicle written by Robert Brian Stoney and published by . This book was released on 1993 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Electrical Vertical Take Off and Landing Aircrafts in a Civilian Urban Environment Concepts Technology and Legislative Framework written by Niklas Lohse and published by GRIN Verlag. This book was released on 2019-12-11 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt: Master's Thesis from the year 2019 in the subject Engineering - Aerospace Technology, grade: 1,5, University of Applied Sciences Wildau, language: English, abstract: This Paper will introduce the most developed concept of vertical take off and landing (VTOL) aircrafts and assess them. It will also analyse the key technology challenges and the legislative situation. The world’s population is growing and people continue to move from rural to urban areas. This is accompanied by an increasing number of cars. As a result of this, traffic jams in densely populated areas and long commutes are becoming omnipresent. Extension possibilities for existing infrastructure, especially within urban areas, are very limited due to space. Consequently, innovative alternatives are required. Flying cars, also known as vertical take off and landing (VTOL) aircraft, still appear to be a future vision which seems to be far away. However, to date, more than 200 of such concepts around the world are being developed, some of which are even performing flight tests. The objective of this Master’s Thesis therefore is to evaluate if flying cars have a realistic potential to improve the overloaded ground infrastructure systems on a mid-term ten years basis. In order to answer the research question, a conceptual examination and subsequent classification of the existing concepts is conducted. Based on this a profound content analysis of the four most mature aircraft is carried out. As a result, three significant technical challenges emerge: batteries, noise pollution and the autonomous flying capability. By performing another content analysis on these obstacles, their respective relevance and impact following an upcoming vehicle certification is investigated. Furthermore, VTOL aircraft operations would require legislative amendments. Hence, the current legal situations and actual activities in those regions are studied, where the four companies with the most mature concepts are based. On that basis it can be concluded, that flying cars have a huge potential to relieve the overstressed infrastructure systems on the ground. Although more than ten years will be required to significantly improve this situation, the first flying cars will most likely be visible much sooner. Technical as well as legal challenges exist, but are not insurmountable and especially the latter are relatively well developed already to enable VTOL operations in an urban environment in the near future.

Download or read book Basics of Unmanned Aerial Vehicles written by Garvit Pandya and published by Notion Press. This book was released on 2021-03-06 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hey, we all must have noticed a drone flying at an event or maybe some other application. ? Have you ever thought about how a Drone flies? ? What are all the types and sizes of Unmanned Aerial Vehicles? ? What are all the parts and applications of a Drone? Are you interested in getting knowledge of the above questions and more related to them? Get Ready! After reading this book, the next time you see a Drone you will see it from a whole different perspective.

Download or read book Design and Control of a Vertical Takeoff and Landing Fixed wing Unmanned Aerial Vehicle written by Yasir Malang and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the goal of extending capabilities of multi-rotor unmanned aerial vehicles (UAVs) for wetland conservation missions, a novel hybrid aircraft design consisting of four tilting rotors and a fixed wing is designed and built. The tilting rotors and nonlinear aerodynamic effects introduce a control challenge for autonomous flight, and the research focus is to develop and validate an autonomous transition flight controller. The overall controller structure consists of separate cascaded Proportional Integral Derivative (PID) controllers whose gains are scheduled according to the rotors' tilt angle. A control mechanism effectiveness factor is used to mix the multi-rotor and fixed-wing control actuators during transition. A nonlinear flight dynamics model is created and transition stability is shown through MATLAB simulations, which proves gain-scheduled control is a good fit for tilt-rotor aircraft. Experiments carried out using the prototype UAV validate simulation results for VTOL and tilted-rotor flight.

Download or read book Design Optimization of Unmanned Aerial Vehicles written by Athanasios Papageorgiou and published by Linköping University Electronic Press. This book was released on 2019-11-13 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last years, Unmanned Aerial Vehicles (UAVs) have gradually become a more efficient alternative to manned aircraft, and at present, they are being deployed in a broad spectrum of both military as well as civilian missions. This has led to an unprecedented market expansion with new challenges for the aeronautical industry, and as a result, it has created a need to implement the latest design tools in order to achieve faster idea-to-market times and higher product performance. As a complex engineering product, UAVs are comprised of numerous sub-systems with intricate synergies and hidden dependencies. To this end, Multidisciplinary Design Optimization (MDO) is a method that can identify systems with better performance through the concurrent consideration of several engineering disciplines under a common framework. Nevertheless, there are still many limitations in MDO, and to this date, some of the most critical gaps can be found in the disciplinary modeling, in the analysis capabilities, and in the organizational integration of the method. As an aeronautical product, UAVs are also expected to work together with other systems and to perform in various operating environments. In this respect, System of Systems (SoS) models enable the exploration of design interactions in various missions, and hence, they allow decision makers to identify capabilities that are beyond those of each individual system. As expected, this significantly more complex formulation raises new challenges regarding the decomposition of the problem, while at the same time, it sets further requirements in terms of analyses and mission simulation. In this light, this thesis focuses on the design optimization of UAVs by enhancing the current MDO capabilities and by exploring the use of SoS models. Two literature reviews serve as the basis for identifying the gaps and trends in the field, and in turn, five case studies try to address them by proposing a set of expansions. On the whole, the problem is approached from a technical as well as an organizational point of view, and thus, this research aims to propose solutions that can lead to better performance and that are also meaningful to the Product Development Process (PDP). Having established the above foundation, this work delves firstly into MDO, and more specifically, it presents a framework that has been enhanced with further system models and analysis capabilities, efficient computing solutions, and data visualization tools. At a secondary level, this work addresses the topic of SoS, and in particular, it presents a multi-level decomposition strategy, multi-fidelity disciplinary models, and a mission simulation module. Overall, this thesis presents quantitative data which aim to illustrate the benefits of design optimization on the performance of UAVs, and it concludes with a qualitative assessment of the effects that the proposed methods and tools can have on both the PDP and the organization.

Download or read book Advances in Unmanned Aerial Vehicles written by Kimon P. Valavanis and published by Springer. This book was released on 2007-07-17 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: The past decade has seen tremendous interest in the production and refinement of unmanned aerial vehicles, both fixed-wing, such as airplanes and rotary-wing, such as helicopters and vertical takeoff and landing vehicles. This book provides a diversified survey of research and development on small and miniature unmanned aerial vehicles of both fixed and rotary wing designs. From historical background to proposed new applications, this is the most comprehensive reference yet.

Download or read book Designing Unmanned Aircraft Systems written by Jay Gundlach and published by AIAA (American Institute of Aeronautics & Astronautics). This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unmanned aircraft systems (UAS) are revolutionizing our approach to flight. Whether monitoring severe weather or conducting a military operation, new versions of these machines and the components that operate them are being developed and implemented at an unprecedented rate as corporations, governments, academia, and private individuals all seek to understand and capitalize upon this innovative, expanding field.

Download or read book Joint Tactics Techniques and Procedures for Unmanned Aerial Vehicles written by United States. Joint Chiefs of Staff and published by . This book was released on 1993 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Flight Formation Control written by Josep M. Guerrero and published by John Wiley & Sons. This book was released on 2012-12-17 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last decade the development and control of Unmanned Aerial Vehicles (UAVs) has attracted a lot of interest. Both researchers and companies have a growing interest in improving this type of vehicle given their many civilian and military applications. This book presents the state of the art in the area of UAV Flight Formation. The coordination and robust consensus approaches are presented in detail as well as formation flight control strategies which are validated in experimental platforms. It aims at helping students and academics alike to better understand what coordination and flight formation control can make possible. Several novel methods are presented: - controllability and observability of multi-agent systems; - robust consensus; - flight formation control; - stability of formations over noisy networks; which generate solutions of guaranteed performance for UAV Flight Formation. Contents 1. Introduction, J.A. Guerrero. 2. Theoretical Preliminaries, J.A. Guerrero. 3. Multiagent Coordination Strategies, J.A. Guerrero, R. Lozano, M.W. Spong, N. Chopra. 4. Robust Control Design for Multiagent Systems with Parametric Uncertainty, J.A. Guerrero, G. Romero. 5. On Adaptive and Robust Controlled Synchronization of Networked Robotic Systems on Strongly Connected Graphs, Y.-C. Liu, N. Chopra. 6. Modeling and Control of Mini UAV, G. Flores Colunga, J.A. Guerrero, J. Escareño, R. Lozano. 7. Flight Formation Control Strategies for Mini UAVs, J.A. Guerrero. 8. Formation Based on Potential Functions, L. García, A. Dzul. 9. Quadrotor Vision-Based Control, J.E. Gomez-Balderas, J.A. Guerrero, S. SALAZAR, R. Lozano, P. Castillo. 10. Toward Vision-Based Coordination of Quadrotor Platoons, L.R. García Carrillo, J.A. Guerrero, R. Lozano. 11. Optimal Guidance for Rotorcraft Platoon Formation Flying in Wind Fields, J.A. Guerrero, Y. Bestaoui, R. Lozano. 12. Impact of Wireless Medium Access Protocol on the Quadrotor Formation Control, J.A. Guerrero, Y. Challal, P. Castillo. 13. MAC Protocol for Wireless Communications, A. Mendez, M. Panduro, O. Elizarraras, D. Covarrubias. 14. Optimization of a Scannable Pattern for Bidimensional Antenna Arrays to Provide Maximum Performance, A. Reyna, M.A. Panduro, A. Mendez.

Download or read book Conceptual Design Development and Simulation of a Tilt duct Unmanned Aerial Vehicle with Vertical Takeoff and Landing Capabilities written by Peter Gabriel Cross and published by . This book was released on 2006 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Unmanned aerial vehicles possessing vertical takeoff and landing capabilities are receiving growing interest within the aerospace industry, as these aircraft can be operated in areas and on missions that preclude the use of conventional aircraft. This thesis presents the development and analysis of the triple tilt-duct aircraft configuration, an aircraft design suited for future generations of VTOL UAVs. The development of a conceptual design for a small-scale, "proof of concept" tilt-duct UAV is presented, culminating in a description of the final conceptual design. The methodology for a detailed analysis of the performance and the stability and control characteristics of the tilt-duct UAV design is outlined, along with the results from these analyses. The tilt-duct UAV has good stability and handling characteristics when in horizontal flight mode, but is highly unstable when hovering or in vertical flight mode. A study of the motion of the tilt-duct aircraft during transition maneuvers between horizontal and vertical flight modes is also presented; schemes for performing optimal transition maneuvers and maintaining adequate pitch control during the transitions are given as well. A flight simulation model was utilized to test the performance and stability and control of the tilt-duct UAV. Though it was not possible to accurately simulate transition maneuvers with the software package used, it was possible to obtain reasonable measurements of the aircraft's performance and response to control inputs. An outlook for the triple tilt-duct configuration is given, along with suggestions for future research. It is felt that the triple tilt-duct configuration is a viable design for future VTOL aircraft"--Abstract, leaf iii.

Download or read book The Design Prototyping Modeling and Flight Tests of a Vertical Take off and Landing VTOL Unmanned Aerial Vehicle UAV written by Ya Wang and published by . This book was released on 2017 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Deep Learning for Unmanned Systems written by Anis Koubaa and published by Springer Nature. This book was released on 2021-10-01 with total page 731 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is used at the graduate or advanced undergraduate level and many others. Manned and unmanned ground, aerial and marine vehicles enable many promising and revolutionary civilian and military applications that will change our life in the near future. These applications include, but are not limited to, surveillance, search and rescue, environment monitoring, infrastructure monitoring, self-driving cars, contactless last-mile delivery vehicles, autonomous ships, precision agriculture and transmission line inspection to name just a few. These vehicles will benefit from advances of deep learning as a subfield of machine learning able to endow these vehicles with different capability such as perception, situation awareness, planning and intelligent control. Deep learning models also have the ability to generate actionable insights into the complex structures of large data sets. In recent years, deep learning research has received an increasing amount of attention from researchers in academia, government laboratories and industry. These research activities have borne some fruit in tackling some of the challenging problems of manned and unmanned ground, aerial and marine vehicles that are still open. Moreover, deep learning methods have been recently actively developed in other areas of machine learning, including reinforcement training and transfer/meta-learning, whereas standard, deep learning methods such as recent neural network (RNN) and coevolutionary neural networks (CNN). The book is primarily meant for researchers from academia and industry, who are working on in the research areas such as engineering, control engineering, robotics, mechatronics, biomedical engineering, mechanical engineering and computer science. The book chapters deal with the recent research problems in the areas of reinforcement learning-based control of UAVs and deep learning for unmanned aerial systems (UAS) The book chapters present various techniques of deep learning for robotic applications. The book chapters contain a good literature survey with a long list of references. The book chapters are well written with a good exposition of the research problem, methodology, block diagrams and mathematical techniques. The book chapters are lucidly illustrated with numerical examples and simulations. The book chapters discuss details of applications and future research areas.

Download or read book Flight Performance of a Vertical Take off and Landing Unmanned Aerial Vehicle written by Jingxuan Sun and published by . This book was released on 2014 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Autonomous Vehicles in Support of Naval Operations written by National Research Council and published by National Academies Press. This book was released on 2005-08-05 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Autonomous vehicles (AVs) have been used in military operations for more than 60 years, with torpedoes, cruise missiles, satellites, and target drones being early examples.1 They have also been widely used in the civilian sector-for example, in the disposal of explosives, for work and measurement in radioactive environments, by various offshore industries for both creating and maintaining undersea facilities, for atmospheric and undersea research, and by industry in automated and robotic manufacturing. Recent military experiences with AVs have consistently demonstrated their value in a wide range of missions, and anticipated developments of AVs hold promise for increasingly significant roles in future naval operations. Advances in AV capabilities are enabled (and limited) by progress in the technologies of computing and robotics, navigation, communications and networking, power sources and propulsion, and materials. Autonomous Vehicles in Support of Naval Operations is a forward-looking discussion of the naval operational environment and vision for the Navy and Marine Corps and of naval mission needs and potential applications and limitations of AVs. This report considers the potential of AVs for naval operations, operational needs and technology issues, and opportunities for improved operations.