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Book Analytical and Experimental Investigation of Flutter Suppression by Piezoelectric Actuation

Download or read book Analytical and Experimental Investigation of Flutter Suppression by Piezoelectric Actuation written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-30 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this research was to analytically and experimentally study the capabilities of piezoelectric plate actuators for suppressing flutter. Piezoelectric materials are characterized by their ability to produce voltage when subjected to a mechanical strain. The converse piezoelectric effect can be utilized to actuate a structure by applying a voltage. For this investigation, a two-degree-of-freedom wind tunnel model was designed, analyzed, and tested. The model consisted of a rigid wing and a flexible mount system that permitted a translational and a rotational degree of freedom. The model was designed such that flutter was encountered within the testing envelope of the wind tunnel. Actuators made of piezoelectric material were affixed to leaf springs of the mount system. Command signals, applied to the piezoelectric actuators, exerted control over the damping and stiffness properties. A mathematical aeroservoelastic model was constructed by using finite element methods, laminated plate theory, and aeroelastic analysis tools. Plant characteristics were determined from this model and verified by open loop experimental tests. A flutter suppression control law was designed and implemented on a digital control computer. Closed loop flutter testing was conducted. The experimental results represent the first time that adaptive materials have been used to actively suppress flutter. They demonstrate that small, carefully placed actuating plates can be used effectively to control aeroelastic response. Heeg, Jennifer Langley Research Center RTOP 505-63-50-15...

Book Flutter Suppression Via Piezoelectric Actuation

Download or read book Flutter Suppression Via Piezoelectric Actuation written by and published by . This book was released on 1991 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Experimental and Analytical Investigation of the Flutter of Flat Built up Panels Under Streamwise Inplane Load

Download or read book Experimental and Analytical Investigation of the Flutter of Flat Built up Panels Under Streamwise Inplane Load written by Robert W. Hess and published by . This book was released on 1970 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: The flutter of 13 panels subject to streamwise inplane load at Mach numbers of 1.57 and 1.96 has been investigated. Panel length-width ratios ranged from 1 to 4.2. The experimental flutter boundary was compared with an analytical flutter boundary for six of the panels. Damping, both aerodynamic and structural, was found to have a pronounced effect on the analytical flutter boundary. The agreement between analysis and experiment was dependent upon how structural damping was introduced in the formulation of the problem.

Book An Investigation Into Flutter Analysis with Relation to Active Flutter Suppression

Download or read book An Investigation Into Flutter Analysis with Relation to Active Flutter Suppression written by M.B. Zgela and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Scientific and Technical Aerospace Reports

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Monthly Catalogue United States Public Documents

Download or read book Monthly Catalogue United States Public Documents written by and published by . This book was released on 1993-07 with total page 868 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Smart Structures and Materials

Download or read book Smart Structures and Materials written by and published by . This book was released on 2001 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book A Collection of Technical Papers

Download or read book A Collection of Technical Papers written by and published by . This book was released on 1992 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book International Conference on Adaptive Structures and Technologies

Download or read book International Conference on Adaptive Structures and Technologies written by and published by . This book was released on 2001 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Structures Technology for Future Aerospace Systems

Download or read book Structures Technology for Future Aerospace Systems written by Ahmed Khairy Noor and published by AIAA. This book was released on 2000 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Aeronautical Engineering

Download or read book Aeronautical Engineering written by and published by . This book was released on 1993 with total page 712 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)