Author: Gina Lee-GlauserPublisher:
ISBN:
Category :
Languages : en
Pages : 84
Book Description
Optimal Active Vibration Absorber: Design and Experimental Results
Author: Gina Lee-GlauserOptimal Active Vibration Absorber
Author: National Aeronaut Administration (Nasa)Publisher: Createspace Independent Publishing Platform
ISBN: 9781722681494
Category :
Languages : en
Pages : 84
Book Description
An optimal active vibration absorber can provide guaranteed closed-loop stability and control for large flexible space structures with collocated sensors/actuators. The active vibration absorber is a second-order dynamic system which is designed to suppress any unwanted structural vibration. This can be designed with minimum knowledge of the controlled system. Two methods for optimizing the active vibration absorber parameters are illustrated: minimum resonant amplitude and frequency matched active controllers. The Controls-Structures Interaction Phase-1 Evolutionary Model at NASA LaRC is used to demonstrate the effectiveness of the active vibration absorber for vibration suppression. Performance is compared numerically and experimentally using acceleration feedback. Lee-Glauser, Gina and Juang, Jer-Nan and Sulla, Jeffrey L. Langley Research Center...
Scientific and Technical Aerospace Reports
Author: Adpative Structures, Seventh International Conference
Author: Barboni RenatoPublisher: CRC Press
ISBN: 9781566765404
Category : Technology & Engineering
Languages : en
Pages : 568
Book Description
Design and Test of Dynamic Vibration Absorbers
Author: Steven F. GriffinPublisher: Springer Nature
ISBN: 3031433084
Category : Technology & Engineering
Languages : en
Pages : 76
Book Description
The aim of this book is to educate the beneficiaries of this technology, because there is so little awareness and understanding of what can be achieved with tuned mass dampers and vibration absorbers and of the relatively small increase in mass and complexity in exchange for the tremendous benefit in vibration reduction. It introduces the feedback approach to help understand why these devices work and are very helpful in modeling the devices on complicated structures. The hardware demonstrators are simple and directly scalable to more complicated structures. Once a reader successfully operates the demonstration hardware, the concepts in the book are directly scalable to implementations on very complex structures like airplanes and rockets. A recipe is provided to 3D print most of the parts as well as easy-to-find brackets and sensors. The whole kit can be assembled in an afternoon. The directions will be similar in detail to a DIY magazine article, providing simple, step-by-step procedures. Via app: download the SN More Media app for free, scan a link with play button and access MP4 directly on your smartphone or tablet.
Recent Advances in Optimal Structural Design
Author: Scott A. BurnsPublisher: ASCE Publications
ISBN: 9780784475249
Category : Technology & Engineering
Languages : en
Pages : 396
Book Description
Sponsored by the Technical Committee on Structural Design of the Technical Administrative Committee on Analysis and Computation of the Technical Activities Division of the Structural Engineering Institute of ASCE. This report documents the dramatic new developments in the field of structural optimization over the last two decades. Changes in both computational techniques and applications can be seen by developments in computational methods and solution algorithms, the role of optimization during the various stages of structural design, and the stochastic nature of design in relation to structural optimization. Topics include: Ømethods for discrete variable structural optimization; Ødecomposition methods in structural optimization; Østate of the art on the use of genetic algorithms in design of steel structures; Øconceptual design optimization of engineering structures; Øtopology and geometry optimization of trusses and frames; Øevolutionary structural optimization; Ødesign and optimization of semi-rigid framed structures; Øoptimized performance-based design for buildings; Ømulti-objective optimum design of seismic-resistant structures; and Øreliability- and cost-oriented optimal bridge maintenance planning. The book concludes with an extensive bibliography of journal papers on structural optimization published between 1987 and 1999.
Monthly Catalogue, United States Public Documents
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1786
Book Description
Monthly Catalog of United States Government Publications
Author: United States. Superintendent of DocumentsPublisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1072
Book Description
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index
Comprehensive Investigation on Active-Passive Hybrid Isolation and Tunable Dynamic Vibration Absorption
Author: Fei WangPublisher: Springer
ISBN: 9811330565
Category : Technology & Engineering
Languages : en
Pages : 190
Book Description
This book discusses efforts to control the low-frequency vibration transmission of typical power equipment and pipeline systems of ships, exploring the use of active and passive hybrid vibration isolation and adjustable dynamic vibration absorption technologies. It also proposes an adaptive feed-forward control strategy and studies a distributed feed-forward control hardware system. In addition, the book presents a three-way dynamic vibration absorption theory used to design a pipeline-system adjustable dynamic vibration absorber, which offers a number of advantages, such as compact structure, easy assembly and disassembly, low power consumption, excellent vibration control effect and wide frequency band adjustable ability, etc. This book is a valuable resource for researchers and engineers in the fields of noise and vibration control, active control systems, active vibration isolation and adaptive dynamic vibration absorption.
Author: