Download or read book Stability Analysis of Distributed Engine Control Systems Under Communication Packet Drop Postprint written by and published by . This book was released on 2008 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Currently, Full Authority Digital Engine Control (FADEC), based on a centralized architecture framework is being widely used for gas turbine engine control. However, current FADEC is not able to meet the increased burden imposed by the advanced intelligent propulsion system concepts. This has necessitated development of the Distributed Engine Control system (DEC). FADEC based on Distributed Control Systems (DCS) offers modularity, improved control systems prognostics and fault tolerance along with reducing the impact of hardware obsolescence. Some of the challenges to be dealt with are selection of communication architecture, high temperature electronics and logical functional partitioning of centralized controller.
Download or read book Design of Distributed Engine Control Systems for Stability Under Communication Packet Dropouts written by and published by . This book was released on 2009 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this paper, we address the issue of stability of Distributed Engine Control Systems under communication constraints and in particular for packet dropouts. We propose a control design procedure labeled Decentralized Distributed Full Authority Digital Engine Control (D2FADEC) based on a two level decentralized control framework. We show that, Packet Dropping Margin (PDM), which is a measure of stability robustness under packet dropouts, is largely dependent on the closed loop controller structure; and that in particular block diagonal structure is more desirable. Thus, we design a controller in a decentralized framework to improve the PDM. The effect of different mathematical partitioning on the PDM is studied. The proposed methodology is applied to a F100 gas turbine engine model which clearly demonstrates the usefulness of decentralization in improving the stability of distributed control under packet dropouts.
Download or read book Stability and Performance of Propulsion Control Systems with Distributed Control Architectures and Failures written by Rohit K. Belapurkar and published by . This book was released on 2013 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Future aircraft engine control systems will be based on a distributed architecture, in which, the sensors and actuators will be connected to the Full Authority Digital Engine Control (FADEC) through an engine area network. Distributed engine control architecture will allow the implementation of advanced, active control techniques along with achieving weight reduction, improvement in performance and lower life cycle cost. The performance of a distributed engine control system is predominantly dependent on the performance of the communication network. Due to the serial data transmission policy, network-induced time delays and sampling jitter are introduced between the sensor/actuator nodes and the distributed FADEC. Communication network faults and transient node failures may result in data dropouts, which may not only degrade the control system performance but may even destabilize the engine control system. Three different architectures for a turbine engine control system based on a distributed framework are presented. A partially distributed control system for a turbo-shaft engine is designed based on ARINC 825 communication protocol. Stability conditions and control design methodology are developed for the proposed partially distributed turbo-shaft engine control system to guarantee the desired performance under the presence of network-induced time delay and random data loss due to transient sensor/actuator failures. A fault tolerant control design methodology is proposed to benefit from the availability of an additional system bandwidth and from the broadcast feature of the data network. It is shown that a reconfigurable fault tolerant control design can help to reduce the performance degradation in presence of node failures. A T-700 turbo-shaft engine model is used to validate the proposed control methodology based on both single input and multiple-input multiple-output control design techniques
Download or read book Information Needs of Communities written by Steven Waldman and published by DIANE Publishing. This book was released on 2011-09 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2009, a bipartisan Knight Commission found that while the broadband age is enabling an info. and commun. renaissance, local communities in particular are being unevenly served with critical info. about local issues. Soon after the Knight Commission delivered its findings, the FCC initiated a working group to identify crosscurrent and trend, and make recommendations on how the info. needs of communities can be met in a broadband world. This report by the FCC Working Group on the Info. Needs of Communities addresses the rapidly changing media landscape in a broadband age. Contents: Media Landscape; The Policy and Regulatory Landscape; Recommendations. Charts and tables. This is a print on demand report.
Download or read book Post Digital Print written by Alessandro Ludovico and published by . This book was released on 2019-04-23 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Digital technology is now a normal part of everyday life. The mutation of music and film into bits and bytes, downloads and streams is now taken for granted. For the world of book and magazine publishing however, this transformation has only just begun. Still, the vision of this transformation is far from new. For more than a century now, avant-garde artists, activists and technologists have been anticipating the development of networked and electronic publishing. Although in hindsight the reports of the death of paper were greatly exaggerated, electronic publishing has now certainly become a reality. How will the analog and the digital coexist in the post-digital age of publishing? How will they transition, mix and cross over? In this book, Alessandro Ludovico rereads the history of the avant-garde arts as a prehistory of cutting through the so-called dichotomy between paper and electronics. Ludovico is the editor and publisher of Neural, a magazine for critical digital culture and media arts. For more than 20 years now, he has been working at the cutting edge (and the outer fringes) of both print publishing and politically engaged digital art.
Download or read book The Gas Turbine Handbook written by Tony Giampaolo and published by The Fairmont Press, Inc.. This book was released on 2003 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second edition of a bestseller, this comprehensive reference provides the fundamental information required to understand both the operation and proper application of all types of gas turbines. The completely updated second edition adds a new section on use of inlet cooling for power augmentation and NOx control. It explores the full spectrum of gas turbines hardware, typical application scenarios, and operating parameters, controls, inlet treatments, inspection, trouble-shooting, and more. The author discusses strategies that can help readers avoid problems before they occur and provides tips that enable diagnosis of problems in their early stages and analysis of failures to prevent their recurrence.
Download or read book Media and the American Mind written by Daniel J. Czitrom and published by Univ of North Carolina Press. This book was released on 2010-02-03 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt: In a fascinating and comprehensive intellectual history of modern communication in America, Daniel Czitrom examines the continuing contradictions between the progressive possibilities that new communications technologies offer and their use as instruments of domination and exploitation.
Download or read book Network Aesthetics written by Patrick Jagoda and published by University of Chicago Press. This book was released on 2016-03-22 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: The term “network” is now applied to everything from the Internet to terrorist-cell systems. But the word’s ubiquity has also made it a cliché, a concept at once recognizable yet hard to explain. Network Aesthetics, in exploring how popular culture mediates our experience with interconnected life, reveals the network’s role as a way for people to construct and manage their world—and their view of themselves. Each chapter considers how popular media and artistic forms make sense of decentralized network metaphors and infrastructures. Patrick Jagoda first examines narratives from the 1990s and 2000s, including the novel Underworld, the film Syriana, and the television series The Wire, all of which play with network forms to promote reflection on domestic crisis and imperial decline in contemporary America. Jagoda then looks at digital media that are interactive, nonlinear, and dependent on connected audiences to show how recent approaches, such as those in the videogame Journey, open up space for participatory and improvisational thought. Contributing to fields as diverse as literary criticism, digital studies, media theory, and American studies, Network Aesthetics brilliantly demonstrates that, in today’s world, networks are something that can not only be known, but also felt, inhabited, and, crucially, transformed.
Download or read book Wireless Sensor Networks written by Kazem Sohraby and published by John Wiley & Sons. This book was released on 2007-04-06 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: Infrastructure for Homeland Security Environments Wireless Sensor Networks helps readers discover the emerging field of low-cost standards-based sensors that promise a high order of spatial and temporal resolution and accuracy in an ever-increasing universe of applications. It shares the latest advances in science and engineering paving the way towards a large plethora of new applications in such areas as infrastructure protection and security, healthcare, energy, food safety, RFID, ZigBee, and processing. Unlike other books on wireless sensor networks that focus on limited topics in the field, this book is a broad introduction that covers all the major technology, standards, and application topics. It contains everything readers need to know to enter this burgeoning field, including current applications and promising research and development; communication and networking protocols; middleware architecture for wireless sensor networks; and security and management. The straightforward and engaging writing style of this book makes even complex concepts and processes easy to follow and understand. In addition, it offers several features that help readers grasp the material and then apply their knowledge in designing their own wireless sensor network systems: * Examples illustrate how concepts are applied to the development and application of * wireless sensor networks * Detailed case studies set forth all the steps of design and implementation needed to solve real-world problems * Chapter conclusions that serve as an excellent review by stressing the chapter's key concepts * References in each chapter guide readers to in-depth discussions of individual topics This book is ideal for networking designers and engineers who want to fully exploit this new technology and for government employees who are concerned about homeland security. With its examples, it is appropriate for use as a coursebook for upper-level undergraduates and graduate students.
Download or read book Structural Health Monitoring Damage Detection Systems for Aerospace written by Markus G. R. Sause and published by Springer Nature. This book was released on 2021 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book presents established methods of structural health monitoring (SHM) and discusses their technological merit in the current aerospace environment. While the aerospace industry aims for weight reduction to improve fuel efficiency, reduce environmental impact, and to decrease maintenance time and operating costs, aircraft structures are often designed and built heavier than required in order to accommodate unpredictable failure. A way to overcome this approach is the use of SHM systems to detect the presence of defects. This book covers all major contemporary aerospace-relevant SHM methods, from the basics of each method to the various defect types that SHM is required to detect to discussion of signal processing developments alongside considerations of aerospace safety requirements. It will be of interest to professionals in industry and academic researchers alike, as well as engineering students. This article/publication is based upon work from COST Action CA18203 (ODIN - http://odin-cost.com/), supported by COST (European Cooperation in Science and Technology). COST (European Cooperation in Science and Technology) is a funding agency for research and innovation networks. Our Actions help connect research initiatives across Europe and enable scientists to grow their ideas by sharing them with their peers. This boosts their research, career and innovation.
Download or read book Information and the Modern Corporation written by James W. Cortada and published by MIT Press. This book was released on 2011-10-07 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: A guide to information as the transformative tool of modern business. While we have been preoccupied with the latest i-gadget from Apple and with Google's ongoing expansion, we may have missed something: the fundamental transformation of whole firms and industries into giant information-processing machines. Today, more than eighty percent of workers collect and analyze information (often in digital form) in the course of doing their jobs. This book offers a guide to the role of information in modern business, mapping the use of information within work processes and tracing flows of information across supply-chain management, product development, customer relations, and sales. The emphasis is on information itself, not on information technology. Information, overshadowed for a while by the glamour and novelty of IT, is the fundamental component of the modern corporation. In Information and the Modern Corporation, longtime IBM manager and consultant James Cortada clarifies the differences among data, facts, information, and knowledge and describes how the art of analytics has all but eliminated decision making based on gut feeling, replacing it with fact-based decisions. He describes the working style of “road warriors,” whose offices are anywhere their laptops and cell phones are and whose deep knowledge of a given topic becomes their medium of exchange. Information is the core of the modern enterprise, and the use of information defines the activities of a firm. This essential guide shows managers and employees better ways to leverage information—by design and not by accident.
Download or read book Transforming Scholarly Publishing Through Open Access written by Charles Wesley Bailey and published by Charles W Bailey Jr. This book was released on 2010 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: Can scholarly journal articles and other scholarly works be made freely available on the Internet? The open access movement says "yes," and it is having a significant impact on scholarly publishing. There are two major open access strategies: (1) open access journals publish articles (typically peer-reviewed articles) that are free of charge and may be able to be reused under an open license (e.g., a Creative Commons license), and (2) self-archiving of digital e-prints (typically prepublication versions of articles) by authors in digital repositories, where they can be accessed free of charge and sometimes reused. Transforming Scholarly Publishing through Open Access: A Bibliography, which has over 1,100 references, provides in-depth coverage of published journal articles, books, and other works about the open access movement. Many references have links to freely available copies of included works.
Download or read book Cyber Physical Systems of Systems written by Andrea Bondavalli and published by Springer. This book was released on 2016-12-16 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is open access under a CC BY 4.0 license. Technical Systems-of-Systems (SoS) – in the form of networked, independent constituent computing systems temporarily collaborating to achieve a well-defined objective – form the backbone of most of today’s infrastructure. The energy grid, most transportation systems, the global banking industry, the water-supply system, the military equipment, many embedded systems, and a great number more, strongly depend on systems-of-systems. The correct operation and continuous availability of these underlying systems-of-systems are fundamental for the functioning of our modern society. The 8 papers presented in this book document the main insights on Cyber-Physical System of Systems (CPSoSs) that were gained during the work in the FP7-610535 European Research Project AMADEOS (acronym for Architecture for Multi-criticality Agile Dependable Evolutionary Open System-of-Systems). It is the objective of this book to present, in a single consistent body, the foundational concepts and their relationships. These form a conceptual basis for the description and understanding of SoSs and go deeper in what we consider the characterizing and distinguishing elements of SoSs: time, emergence, evolution and dynamicity.
Download or read book Census of Institutional Repositories in the United States written by and published by . This book was released on 2007 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: "In this resport, the authors describe results of a nationwide census of institutuional repositories in U.S. academic institutuions. The census is one of several activities of the MIRACLE Project [Making Institutional Repositories a Collaborative Learning Environment Project], an IMLS-funded research program based at the University of Michigan."--CLIR website, viewed March 9, 2007 http://www.clir.org/pubs/abstract/pub140abst.html.
Download or read book Understanding Knowledge as a Commons written by Charlotte Hess and published by National Geographic Books. This book was released on 2011-01-21 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Looking at knowledge as a shared resource: experts discuss how to define, protect, and build the knowledge commons in the digital age. Knowledge in digital form offers unprecedented access to information through the Internet but at the same time is subject to ever-greater restrictions through intellectual property legislation, overpatenting, licensing, overpricing, and lack of preservation. Looking at knowledge as a commons—as a shared resource—allows us to understand both its limitless possibilities and what threatens it. In Understanding Knowledge as a Commons, experts from a range of disciplines discuss the knowledge commons in the digital era—how to conceptualize it, protect it, and build it. Contributors consider the concept of the commons historically and offer an analytical framework for understanding knowledge as a shared social-ecological system. They look at ways to guard against enclosure of the knowledge commons, considering, among other topics, the role of research libraries, the advantages of making scholarly material available outside the academy, and the problem of disappearing Web pages. They discuss the role of intellectual property in a new knowledge commons, the open access movement (including possible funding models for scholarly publications), the development of associational commons, the application of a free/open source framework to scientific knowledge, and the effect on scholarly communication of collaborative communities within academia, and offer a case study of EconPort, an open access, open source digital library for students and researchers in microeconomics. The essays clarify critical issues that arise within these new types of commons—and offer guideposts for future theory and practice. Contributors David Bollier, James Boyle, James C. Cox, Shubha Ghosh, Charlotte Hess, Nancy Kranich, Peter Levine, Wendy Pradt Lougee, Elinor Ostrom, Charles Schweik, Peter Suber, J. Todd Swarthout, Donald Waters
Download or read book Content Nation written by John Blossom and published by John Wiley & Sons. This book was released on 2011-09-14 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Find out how social media communications is changing the content provider industry in Content Nation: Surviving and Thriving as Social Media Technology Changes Our Lives and Our Future. Developed through a collaborative wiki, this book is a collection of information from social media experts and serves as an example of how social media impacts the way we provide and receive content. You will learn how social media changes the way businesses market products and services, influences how people interact with the government, and dictates how we communicate with one another on a personal level.
Download or read book Concepts of openness and open access written by Madalli, Devika P. and published by UNESCO Publishing. This book was released on 2015-04-27 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
