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This text contains papers from the 13th Lighter-Than-Air Systems Technology Conference and AIAA International Balloon Technology Conference.
This comprehensive guide to modern airship design and operation, written by world experts, is the only up-to-date book on airship technology intended as a technical guide to those interested in studying, designing, building, flying, and operating airship. In addition to basic airship principles, the book covers conventional and unconventional design in a panoramic and in-depth manner focusing on four themes: (1) basic principles such as aerostatics, aerodynamics, propulsion, materials and structures, stability and control, mooring and ground handling, and piloting and meteorology; (2) different airship types including conventional (manned and unmanned), hot air, solar powered, and hybrid; (3) airship applications including surveillance, tourism, heavy lift, and disaster and humanitarian relief; and (4) airship roles and economic considerations. This second edition introduces nine new chapters and includes significant revisions and updates to five of the original chapters.
A unique and indispensable guide to modern airship design and operation, for researchers and professionals working in mechanical and aerospace engineering.
Lithium-sulfur (Li-S) batteries provide an alternative to lithium-ion (Li-ion) batteries and are showing promise for providing much higher energy densities. Systems utilizing Li-S batteries are presently under development and early stages of commercialization. This technology is being developed in order to provide higher, safer levels of energy at significantly lower costs. Lithium-Sulfur Batteries: Advances in High-Energy Density Batteries addresses various aspects of the current research in the field of sulfur cathodes and lithium metal anode including abundance, system voltage, and capacity. In addition, it provides insights into the basic challenges faced by the system. The book includes novel strategies to prevent polysulfide dissolution in sulfur-based systems while also exploring new materials systems as anodes preventing dendrite formation in Li metal anodes. - Provides insight into the basic challenges faced by the materials system - Discusses additives and suppressants to prevent dissolution of electrolyes - Includes a review of the safety limitations associated with this technology - Incorporates a historical perspective into the development of lithium-sulfur batteries
An aerial robot is a system capable of sustained flight with no direct human control and able to perform a specific task. A lighter than air robot is an aerial robot that relies on the static lift to balance its own weight. It can also be defined as a lighter than air unmanned aerial vehicle or an unmanned airship with sufficient autonomy. Lighter than air systems are particularly appealing since the energy to keep them airborne is small. They are increasingly considered for various tasks such as monitoring, surveillance, advertising, freight carrier, transportation. This book familiarizes readers with a hierarchical decoupled planning and control strategy that has been proven efficient through research. It is made up of a hierarchy of modules with well defined functions operating at a variety of rates, linked together from top to bottom. The outer loop, closed periodically, consists of a discrete search that produces a set of waypoints leading to the goal while avoiding obstacles and weighed regions. The second level smoothes this set so that the generated paths are feasible given the vehicle's velocity and accelerations limits. The third level generates flyable, timed trajectories and the last one is the tracking controller that attempts to minimize the error between the robot measured trajectory and the reference trajectory. This hierarchy is reflected in the structure and content of the book. Topics treated are: Modelling, Flight Planning, Trajectory Design and Control. Finally, some actual projects are described in the appendix. This volume will prove useful for researchers and practitioners working in Robotics and Automation, Aerospace Technology, Control and Artificial Intelligence.
This book presents the select proceedings of the International Conference on Advanced Production and Industrial Engineering (ICAPIE) - 2021 held at Delhi Technological University, Delhi, during June 18–19, 2021. The book covers the recent advances and challenges in the area of production and industrial engineering. Various topics covered include artificial intelligence and expert systems, CAD/CAM Integration Technology, CAD/CAM, automation and robotics, computer-aided geometric design and simulation, construction machinery and equipment, design tools, cutting tool material and coatings, dynamic mechanical analysis, optimization and control, energy machinery and equipment, flexible manufacturing technology and system, fluid dynamics, bio-fuels, fuel cells, high-speed/precision machining, laser processing technology, logistics and supply chain management, machinability of materials, composite materials, material engineering, mechanical dynamics and its applications, mechanical power engineering, mechanical transmission theory and applications, non-traditional machining processes, operations management, precision manufacturing and measurement, precision manufacturing and measurement, reverse engineering and structural strength and robustness. This book is useful for various researcher mainly mechanical and allied engineering discipline.