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Experimental Techniques For Measuring Vibrations Using A Laser Interferometer
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Book Synopsis Experimental Techniques for Measuring Vibrations Using a Laser Interferometer by : Ronald A. Darby
Download or read book Experimental Techniques for Measuring Vibrations Using a Laser Interferometer written by Ronald A. Darby and published by . This book was released on 1966 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Existing and some apparently novel experimental techniques for measuring vibrations by use of a HeNe gas laser interferometer are evaluated. Schemes for obtaining accurate, absolute measurements of displacements less than 100 A, such as used in calibrating accelerometers, are considered as well as are methods of scanning a vibrating surface in order to obtain its dynamic displacement profile, as is often desired in acoustic radiation studies. The effect of intensity fluctuations of the light source, variations of the medium in the optical paths, background vibrational noise, and other phenomena are evaluated by comparison of the theory with measurements made on both a vibrating elastic plate and a vibration shake table. It is shown that experimental measurements at low displacements (“1938 A) can be compared with theory without resorting to statistical evaluations of instrument error and undesired time-variant parameters. (Author).
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1988 with total page 956 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Lasers and Masers: a Continuing Bibliography by : United States. National Aeronautics and Space Administration
Download or read book Lasers and Masers: a Continuing Bibliography written by United States. National Aeronautics and Space Administration and published by . This book was released on 1965 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Interferometry and Vibration Compensation on the National Spherical Torus Experiment – Upgrade by : Evan Richard Scott
Download or read book Interferometry and Vibration Compensation on the National Spherical Torus Experiment – Upgrade written by Evan Richard Scott and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The National Spherical Torus Experiment (NSTX) located at the Princeton Plasma Physics Laboratory (PPPL) has recently undergone an extensive upgrade to NSTX-U. The Far-infrared Tangential Interferometer/Polarimeter (FIReTIP) system, previously installed on NSTX before the upgrade, is an important laser-based plasma diagnostic for line-integrated plasma density measurements with high temporal resolution. Due to extensive changes to NSTX during the upgrade process, the FIReTIP system has been dramatically altered from its previous configuration, including an extensive waveguide installation both outside and within the NSTX-U test cell; only the lasers and previous electronics are reused. The modification and reinstallation of the system are presented.One of the primary goals of FIReTIP on NSTX-U is to provide real-time density measurements for density feedback control of the tokamak plasma. By nature, FIReTIP is susceptible to noise from mechanical vibrations. For the plasma core, this problem is generally avoided through use of mechanical vibration isolation units to dampen vibrations on sensitive components, such as retroreflectors for the laser beams. In FIReTIP’s new configuration, however, mechanical vibration isolation cannot be used because the retroreflector is mounted to the inside wall of the NSTX-U vacuum vessel. To compensate for the effects of vibrations, two methods have been investigated.A visible light interferometer will be employed on FIReTIP to measure mechanical vibrations independently of the plasma, thereby allowing the effects of vibrations to be subtracted from the measured plasma density. The previous FIReTIP system employed a visible light interferometer with promising results, but this system was not capable of unambiguous determination of the direction of vibrations and was therefore unsuited for real-time correction of the FIReTIP system. The visible light interferometer has been upgraded to a heterodyne interferometer system capable of such unambiguous measurements and real-time density corrections. Additionally, the use of active noise cancellation via Kalman filtering has been explored for use with FIReTIP alongside the visible light interferometer. Active noise cancellation offers many advantages for vibration compensation if it can be implemented in a reliable and robust manner, including lower costs and vibration compensation applied to multiple locations of interest on the system. Both the accuracy and feasibility of active noise cancellation on the FIReTIP system are presented as a proof of principle of this novel technique.
Book Synopsis First International Conference on Vibration Measurements by Laser Techniques by : Enrico Primo Tomasini
Download or read book First International Conference on Vibration Measurements by Laser Techniques written by Enrico Primo Tomasini and published by . This book was released on 1994 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt: This conference is intended to offer a forum for those involved either in research or in application of laser instruments for motion, velocity and vibration measurements on solids. The purpose is to extend the knowledge and the use of such techniques and to encourage the development of new systems for laboratory use, for field testing, or for industrial application
Book Synopsis Handbook of Experimental Structural Dynamics by : Randall Allemang
Download or read book Handbook of Experimental Structural Dynamics written by Randall Allemang and published by Springer Nature. This book was released on 2022-06-30 with total page 1426 pages. Available in PDF, EPUB and Kindle. Book excerpt: The SEM Handbook of Experimental Structural Dynamics stands as a comprehensive overview and reference for its subject, applicable to workers in research, product design and manufacture, and practice. The Handbook is devoted primarily to the areas of structural mechanics served by the Society for Experimental Mechanics IMAC community, such as modal analysis, rotating machinery, structural health monitoring, shock and vibration, sensors and instrumentation, aeroelasticity, ground testing, finite element techniques, model updating, sensitivity analysis, verification and validation, experimental dynamics sub-structuring, quantification of margin and uncertainty, and testing of civil infrastructure. Chapters offer comprehensive, detailed coverage of decades of scientific and technologic advance and all demonstrate an experimental perspective. Several sections specifically discuss the various types of experimental testing and common practices utilized in the automotive, aerospace, and civil structures industries. · History of Experimental Structural Mechanics · DIC Methods - Dynamic Photogrammetry · LDV Methods · Applied Digital Signal Processing · Introduction to Spectral - Basic Measurements · Structural Measurements - FRF · Random and Shock Testing · Rotating System Analysis Methods · Sensors Signal Conditioning Instrumentation · Design of Modal Tests · Experimental Modal Methods · Experimental Modal Parameter Evaluation · Operating Modal Analysis Methods · Analytical Numerical Substructuring · Finite Element Model Correlation · Model Updating · Damping of Materials and Structures · Model Calibration and Validation in Structures · Uncertainty Quantification: UQ, QMU and Statistics · Nonlinear System Analysis Methods (Experimental) · Structural Health Monitoring and Damage Detection · Experimental Substructure Modeling · Modal Modeling · Response (Impedance) Modeling · Nonlinear Normal Mode Analysis Techniques (Analytical) · Modal Modeling with Nonlinear Connection Elements (Analytical) · Acoustics of Structural Systems (VibroAcoustics) · Automotive Structural Testing · Civil Structural Testing · Aerospace Perspective for Modeling and Validation · Sports Equipment Testing · Applied Math for Experimental Structural Mechanics Contributions present important theory behind relevant experimental methods as well as application and technology. Topical authors emphasize and dissect proven methods and offer detail beyond a simple review of the literature. Additionally, chapters cover practical needs of scientists and engineers who are new to the field. In most cases, neither the pertinent theory nor, in particular, the practical issues have been presented formally in current academic textbooks. Each chapter in the Handbook represents a ’must read’ for someone new to the subject or for someone returning to the field after an absence. Reference lists in each chapter consist of the seminal papers in the literature. This Handbook stands in parallel to the SEM Handbook of Experimental Solid Mechanics, where this Handbook focuses on experimental dynamics of structures at a macro-scale often involving multiple components and materials where the SEM Handbook of Experimental Solid Mechanics focuses on experimental mechanics of materials at a nano-scale and/or micro-scale.
Book Synopsis International Conference on Vibration Measurements by Laser Techniques: Advances and Applications by :
Download or read book International Conference on Vibration Measurements by Laser Techniques: Advances and Applications written by and published by . This book was released on 2006 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government-wide Index to Federal Research & Development Reports by :
Download or read book Government-wide Index to Federal Research & Development Reports written by and published by . This book was released on 1967-04 with total page 1078 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Shock and Vibration Digest written by and published by . This book was released on 1976 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1988-12 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Technical Abstract Bulletin by : Defense Documentation Center (U.S.)
Download or read book Technical Abstract Bulletin written by Defense Documentation Center (U.S.) and published by . This book was released on 1967 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advances in Multiphysics Simulation and Experimental Testing of Mems by : Attilio Frangi
Download or read book Advances in Multiphysics Simulation and Experimental Testing of Mems written by Attilio Frangi and published by Imperial College Press. This book was released on 2008 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume takes a much needed multiphysical approach to the numerical and experimental evaluation of the mechanical properties of MEMS and NEMS. The contributed chapters present many of the most recent developments in fields ranging from microfluids and damping to structural analysis, topology optimization and nanoscale simulations. The book responds to a growing need emerging in academia and industry to merge different areas of expertise towards a unified design and analysis of MEMS and NEMS.
Book Synopsis Phononic Crystals by : Abdelkrim Khelif
Download or read book Phononic Crystals written by Abdelkrim Khelif and published by Springer. This book was released on 2015-07-28 with total page 247 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an in-depth analysis as well as an overview of phononic crystals. This book discusses numerous techniques for the analysis of phononic crystals and covers, among other material, sonic and ultrasonic structures, hypersonic planar structures and their characterization, and novel applications of phononic crystals. This is an ideal book for those working with micro and nanotechnology, MEMS (microelectromechanical systems), and acoustic devices. This book also: Presents an introduction to the fundamentals and properties of phononic crystals Covers simulation techniques for the analysis of phononic crystals Discusses sonic and ultrasonic, hypersonic and planar, and three-dimensional phononic crystal structures Illustrates how phononic crystal structures are being deployed in communication systems and sensing systems
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1974 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Handbook of Noise and Vibration Control by : Malcolm J. Crocker
Download or read book Handbook of Noise and Vibration Control written by Malcolm J. Crocker and published by John Wiley & Sons. This book was released on 2007-10-05 with total page 1594 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two of the most acclaimed reference works in the area of acoustics in recent years have been our Encyclopedia of Acoustics, 4 Volume set and the Handbook of Acoustics spin-off. These works, edited by Malcolm Crocker, positioned Wiley as a major player in the acoustics reference market. With our recently published revision of Beranek & Ver's Noise and Vibration Control Engineering, Wiley is a highly respected name in the acoustics business. Crocker's new handbook covers an area of great importance to engineers and designers. Noise and vibration control is one largest areas of application of the acoustics topics covered in the successful encyclopedia and handbook. It is also an area that has been under-published in recent years. Crocker has positioned this reference to cover the gamut of topics while focusing more on the applications to industrial needs. In this way the book will become the best single source of need-to-know information for the professional markets.
Book Synopsis Theses and Dissertations by : Catholic University of America. Library
Download or read book Theses and Dissertations written by Catholic University of America. Library and published by . This book was released on 1970 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Vibration-based Techniques For Damage Detection And Localization In Engineering Structures by : Ali Salehzadeh Nobari
Download or read book Vibration-based Techniques For Damage Detection And Localization In Engineering Structures written by Ali Salehzadeh Nobari and published by World Scientific. This book was released on 2018-05-04 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the oil and gas industries, large companies are endeavoring to find and utilize efficient structural health monitoring methods in order to reduce maintenance costs and time. Through an examination of the vibration-based techniques, this title addresses theoretical, computational and experimental methods used within this trend.By providing comprehensive and up-to-date coverage of established and emerging processes, this book enables the reader to draw their own conclusions about the field of vibration-controlled damage detection in comparison with other available techniques. The chapters offer a balance between laboratory and practical applications, in addition to detailed case studies, strengths and weakness are drawn from a broad spectrum of information.
