29 research outputs found

    Guidance and control for defense systems against ballistic threats

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    A defense system against ballistic threat is a very complex system from the engineering point of view. It involves different kinds of subsystems and, at the same time, it presents very strict requirements. Technology evolution drives the need of constantly upgrading system’s capabilities. The guidance and control fields are two of the areas with the best progress possibilities. This thesis deals with the guidance and control problems involved in a defense system against ballistic threats. This study was undertaken by analyzing the mission of an intercontinental ballistic missile. Trajectory reconstruction from radar and satellite measurements was carried out with an estimation algorithm for nonlinear systems. Knowing the trajectory is a prerequisite for intercepting the ballistic missile. Interception takes place thanks to a dedicated tactical missile. The guidance and control of this missile were also studied in this work. Particular attention was paid on the estimation of engagement’s variables inside the homing loop. Interceptor missiles are usually equipped with a seeker that provides the angle under which the interceptor sees its target. This single measurement does not guarantee the observability of the variables required by advanced guidance laws such as APN, OGL, or differential games-based laws. A new guidance strategy was proposed, that solves the bad observability problems and returns satisfactory engagement performances. The thesis is concluded by a study of the interceptor most suitable aerodynamic configuration in order to implement the proposed strategy, and by the relative autopilot design. The autopilot implements the lateral acceleration commands from the guidance system. The design was carried out with linear control techniques, considering requirements on the rising time, actuators maximum effort, and response to a bang-bang guidance command. The analysis of the proposed solutions was carried on by means of numerical simulations, developed for each single case-study

    Intelligent Autonomous Decision-Making and Cooperative Control Technology of High-Speed Vehicle Swarms

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    This book is a reprint of the Special Issue “Intelligent Autonomous Decision-Making and Cooperative Control Technology of High-Speed Vehicle Swarms”,which was published in Applied Sciences

    Aeronautical Engineering: A continuing bibliography with indexes (supplement 175)

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    This bibliography lists 467 reports, articles and other documents introduced into the NASA scientific and technical information system in May 1984. Topics cover varied aspects of aeronautical engineering, geoscience, physics, astronomy, computer science, and support facilities

    Aeronautical Engineering: A continuing bibliography with indexes (supplement 206)

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    This bibliography lists 422 reports, articles and other documents introduced into the NASA scientific and technical information system in October 1986

    Aeronautical engineering: A continuing bibliography with indexes (supplement 195)

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    This bibliography lists 389 reports, articles and other documents introduced into the NASA scientific and technical information system in December 1985

    Aeronautical Engineering: A special bibliography with indexes, supplement 62

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    This bibliography lists 306 reports, articles, and other documents introduced into the NASA scientific and technical information system in September 1975

    Compilation of thesis abstracts, September 2009

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    NPS Class of September 2009This quarter’s Compilation of Abstracts summarizes cutting-edge, security-related research conducted by NPS students and presented as theses, dissertations, and capstone reports. Each expands knowledge in its field.http://archive.org/details/compilationofsis109452751

    Disruptive Technologies with Applications in Airline & Marine and Defense Industries

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    Disruptive Technologies With Applications in Airline, Marine, Defense Industries is our fifth textbook in a series covering the world of Unmanned Vehicle Systems Applications & Operations On Air, Sea, and Land. The authors have expanded their purview beyond UAS / CUAS / UUV systems that we have written extensively about in our previous four textbooks. Our new title shows our concern for the emergence of Disruptive Technologies and how they apply to the Airline, Marine and Defense industries. Emerging technologies are technologies whose development, practical applications, or both are still largely unrealized, such that they are figuratively emerging into prominence from a background of nonexistence or obscurity. A Disruptive technology is one that displaces an established technology and shakes up the industry or a ground-breaking product that creates a completely new industry.That is what our book is about. The authors think we have found technology trends that will replace the status quo or disrupt the conventional technology paradigms.The authors have collaborated to write some explosive chapters in Book 5:Advances in Automation & Human Machine Interface; Social Media as a Battleground in Information Warfare (IW); Robust cyber-security alterative / replacement for the popular Blockchain Algorithm and a clean solution for Ransomware; Advanced sensor technologies that are used by UUVs for munitions characterization, assessment, and classification and counter hostile use of UUVs against U.S. capital assets in the South China Seas. Challenged the status quo and debunked the climate change fraud with verifiable facts; Explodes our minds with nightmare technologies that if they come to fruition may do more harm than good; Propulsion and Fuels: Disruptive Technologies for Submersible Craft Including UUVs; Challenge the ammunition industry by grassroots use of recycled metals; Changing landscape of UAS regulations and drone privacy; and finally, Detailing Bioterrorism Risks, Biodefense, Biological Threat Agents, and the need for advanced sensors to detect these attacks.https://newprairiepress.org/ebooks/1038/thumbnail.jp

    Proceedings of the Seventeenth Annual Conference on Manual Control

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    Manual control is considered, with concentration on perceptive/cognitive man-machine interaction and interface

    Terminal Intercept Guidance and Autopilot for Aircraft Defense Against an Attacking Missile Via 3D Sliding Mode Approach

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    This study focuses on an integrated guidance and autopilot (IGA) scheme for a defense missile trying to protect a cooperative aircraft from guided munitions which have the same capabilities as that of the defense missile. A higher-order sliding mode (HOSM) approach is used in the development of the IGA. A three-dimensional (3D) sliding surface vector is introduced to handle the roll-yaw/-pitch coupled motions for the IGA system design. Intermediate control variables for the IGA system are carefully selected and approximated time derivatives of a sliding surface are used such that the sliding surface structure is simple and sufficient to propagate the actuator input to the sliding surface. Potential of the IGA is demonstrated and analyzed with simulation results and performance comparison with a conventional guidance law is also presented. © 2012 AACC American Automatic Control Council)
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