An Assessment Of Modern Methods For Rotor Track And Balance

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An Assessment of Modern Methods for Rotor Track and Balance

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Author : Michael J. Renzi
Publisher :
ISBN 13 : 9781423519171
Total Pages : 104 pages
Book Rating : 4.5/5 (191 download)

Book Synopsis An Assessment of Modern Methods for Rotor Track and Balance by : Michael J. Renzi

Download or read book An Assessment of Modern Methods for Rotor Track and Balance written by Michael J. Renzi and published by . This book was released on 2004-06-01 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: One routine maintenance item facing the helicopter industry today is the issue of rotor track and balance (RT&B). While the task of reducing vibrations is often overlooked as simply an unimportant maintenance concern, what should not be overlooked is the extensive amount of time and money committed by maintenance to smoothing an aircraft. If there were a way to make the process of rotor track and balance more efficient it would be a huge boost to the helicopter industry in both time and money. The first steps towards research into new and improved methods is to evaluate what is currently used in the field, determine if there is room for improvement and if so what can be improved. While each company may use a slightly different approach to correct the problem, each method has essentially the same objective--to reduce vibrations in the helicopter structure due to main and tail rotor rotation. This document reflects the findings of a study done to gather information and evaluate the different RT&B methods that currently exist, pinpointing the existing weaknesses in the process. In most all cases, a qualitative approach was used in determining problems and comparing current systems as the actual proprietary algorithms used by RT&B companies were unavailable.

Aerospace Engineering

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Author :
Publisher :
ISBN 13 :
Total Pages : 484 pages
Book Rating : 4.:/5 (318 download)

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Download or read book Aerospace Engineering written by and published by . This book was released on 1988 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Smart Helicopter Rotors

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Author : Ranjan Ganguli
Publisher : Springer
ISBN 13 : 3319247689
Total Pages : 264 pages
Book Rating : 4.3/5 (192 download)

Book Synopsis Smart Helicopter Rotors by : Ranjan Ganguli

Download or read book Smart Helicopter Rotors written by Ranjan Ganguli and published by Springer. This book was released on 2015-12-16 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Exploiting the properties of piezoelectric materials to minimize vibration in rotor-blade actuators, this book demonstrates the potential of smart helicopter rotors to achieve the smoothness of ride associated with jet-engined, fixed-wing aircraft. Vibration control is effected using the concepts of trailing-edge flaps and active-twist. The authors’ optimization-based approach shows the advantage of multiple trailing-edge flaps and algorithms for full-authority control of dual trailing-edge-flap actuators are presented. Hysteresis nonlinearity in piezoelectric stack actuators is highlighted and compensated by use of another algorithm. The idea of response surfaces provides for optimal placement of trailing-edge flaps. The concept of active twist involves the employment of piezoelectrically induced shear actuation in rotating beams. Shear is then demonstrated for a thin-walled aerofoil-section rotor blade under feedback-control vibration minimization. Active twist is shown to be significant in reducing vibration caused by dynamic stall. The exposition of ideas, materials and algorithms in this monograph is supported by extensive reporting of results from numerical simulations of smart helicopter rotors. This monograph will be a valuable source of reference for researchers and engineers with backgrounds in aerospace, mechanical and electrical engineering interested in smart materials and vibration control. Advances in Industrial Control aims to report and encourage the transfer of technology in control engineering. The rapid development of control technology has an impact on all areas of the control discipline. The series offers an opportunity for researchers to present an extended exposition of new work in all aspects of industrial control.

Balancing of High-Speed Machinery

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Author : Mark S. Darlow
Publisher : Springer Science & Business Media
ISBN 13 : 1461236568
Total Pages : 197 pages
Book Rating : 4.4/5 (612 download)

Book Synopsis Balancing of High-Speed Machinery by : Mark S. Darlow

Download or read book Balancing of High-Speed Machinery written by Mark S. Darlow and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern rotating machinery, particularly turbomachinery, is frequently being designed to operate at higher speeds than in the past. Consequently, there is an increased need to balance high-speed rotors. The purpose of this book is to provide the engineering student or practicing engineer with a single, complete reference on high-speed rotor balancing. To this end, a detailed analytical background and practical application procedures are presented for each of the principal high-speed rotor balancing methods, i.e. modal balancing, influence coefficient balancing and the Unified Balancing Approach. This information is supplemented and supported through a presentation of the theoretical development of synchronous rotor vibration and a brief overview of rigid rotor balancing techniques and machines. This is the first time this material is available in a single, concise volume, together with detailed descriptions of application procedures.

Recent Advances in Multidisciplinary Analysis and Optimization

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Author :
Publisher :
ISBN 13 :
Total Pages : 1084 pages
Book Rating : 4.3/5 (126 download)

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Download or read book Recent Advances in Multidisciplinary Analysis and Optimization written by and published by . This book was released on 1989 with total page 1084 pages. Available in PDF, EPUB and Kindle. Book excerpt:

NASA SP.

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Author :
Publisher :
ISBN 13 :
Total Pages : 706 pages
Book Rating : 4.:/5 (319 download)

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Download or read book NASA SP. written by and published by . This book was released on 1991 with total page 706 pages. Available in PDF, EPUB and Kindle. Book excerpt:

System Health Management

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Author : Stephen B. Johnson
Publisher : John Wiley & Sons
ISBN 13 : 1119998735
Total Pages : 659 pages
Book Rating : 4.1/5 (199 download)

Book Synopsis System Health Management by : Stephen B. Johnson

Download or read book System Health Management written by Stephen B. Johnson and published by John Wiley & Sons. This book was released on 2011-06-01 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: System Health Management: with Aerospace Applications provides the first complete reference text for System Health Management (SHM), the set of technologies and processes used to improve system dependability. Edited by a team of engineers and consultants with SHM design, development, and research experience from NASA, industry, and academia, each heading up sections in their own areas of expertise and co-coordinating contributions from leading experts, the book collates together in one text the state-of-the-art in SHM research, technology, and applications. It has been written primarily as a reference text for practitioners, for those in related disciplines, and for graduate students in aerospace or systems engineering. There are many technologies involved in SHM and no single person can be an expert in all aspects of the discipline.System Health Management: with Aerospace Applications provides an introduction to the major technologies, issues, and references in these disparate but related SHM areas. Since SHM has evolved most rapidly in aerospace, the various applications described in this book are taken primarily from the aerospace industry. However, the theories, techniques, and technologies discussed are applicable to many engineering disciplines and application areas. Readers will find sections on the basic theories and concepts of SHM, how it is applied in the system life cycle (architecture, design, verification and validation, etc.), the most important methods used (reliability, quality assurance, diagnostics, prognostics, etc.), and how SHM is applied in operations (commercial aircraft, launch operations, logistics, etc.), to subsystems (electrical power, structures, flight controls, etc.) and to system applications (robotic spacecraft, tactical missiles, rotorcraft, etc.).

AIAA Journal

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Author : American Institute of Aeronautics and Astronautics
Publisher :
ISBN 13 :
Total Pages : 1358 pages
Book Rating : 4.F/5 ( download)

Book Synopsis AIAA Journal by : American Institute of Aeronautics and Astronautics

Download or read book AIAA Journal written by American Institute of Aeronautics and Astronautics and published by . This book was released on 2002 with total page 1358 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Loads and Aeroelasticity Division Research and Technology Accomplishments for FY 1987 and Plans for FY 1988

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Author :
Publisher :
ISBN 13 :
Total Pages : 154 pages
Book Rating : 4.:/5 (317 download)

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Download or read book Loads and Aeroelasticity Division Research and Technology Accomplishments for FY 1987 and Plans for FY 1988 written by and published by . This book was released on 1988 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Loads and Aeroelasticity Division Research and Technology Accomplishments for FY 1986 and Plans for FY 1987

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Publisher :
ISBN 13 :
Total Pages : 136 pages
Book Rating : 4.:/5 (317 download)

Book Synopsis Loads and Aeroelasticity Division Research and Technology Accomplishments for FY 1986 and Plans for FY 1987 by :

Download or read book Loads and Aeroelasticity Division Research and Technology Accomplishments for FY 1986 and Plans for FY 1987 written by and published by . This book was released on 1987 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Aeronautical Engineering

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Publisher :
ISBN 13 :
Total Pages : 580 pages
Book Rating : 4.F/5 ( download)

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Download or read book Aeronautical Engineering written by and published by . This book was released on 1971 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA)

Verti-flite

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Author :
Publisher :
ISBN 13 :
Total Pages : 592 pages
Book Rating : 4.3/5 (91 download)

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Download or read book Verti-flite written by and published by . This book was released on 1998 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Journal of Dynamic Systems, Measurement, and Control

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Author :
Publisher :
ISBN 13 :
Total Pages : 542 pages
Book Rating : 4.:/5 (318 download)

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Download or read book Journal of Dynamic Systems, Measurement, and Control written by and published by . This book was released on 2005 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Aerospace America

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Publisher :
ISBN 13 :
Total Pages : 562 pages
Book Rating : 4.F/5 ( download)

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Download or read book Aerospace America written by and published by . This book was released on 2001 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Aerospace

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ISBN 13 :
Total Pages : 410 pages
Book Rating : 4.:/5 (318 download)

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Download or read book Aerospace written by and published by . This book was released on 1994 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Advances in Onboard Systems Technology

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Author : A. Del Core
Publisher :
ISBN 13 :
Total Pages : 272 pages
Book Rating : 4.3/5 (91 download)

Book Synopsis Advances in Onboard Systems Technology by : A. Del Core

Download or read book Advances in Onboard Systems Technology written by A. Del Core and published by . This book was released on 1996-05-03 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last thirty years the European aeronautical industry has achieved a respected and internationally successful position. This EC-Aeronautics Research Series provides the opportunity to present the results of recent research projects in areas critical to the future competitiveness of the industry in world markets. It contains Technical Publications of the completed EC-Aeronautics pilot phase project work, which has been supported under Area 5 : "Specific Activities Relating to Aeronautics" of the BRITE/EURAM Programme within the Second Framework Programme of European Community Activities in the Field of Research and Technology Development (1989?1992). This volume presents the results of three research projects addressing aircraft ice protection, helicopter health monitoring, and electrically powered flight control actuation systems.

Applied Mechanics Reviews

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ISBN 13 :
Total Pages : 1000 pages
Book Rating : 4.:/5 (31 download)

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Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1975 with total page 1000 pages. Available in PDF, EPUB and Kindle. Book excerpt: