Progress and New Techniques in Buffet Alleviation

Progress and New Techniques in Buffet Alleviation
Author:
Publisher:
Total Pages: 0
Release: 1997
Genre:
ISBN:

Research for twin-tail buffet alleviation is centered on ground tests, wind tunnel tests, and computational fluid dynamics (CFD) analysis. The objective of the research is to improve present technology to obtain a significant reduction in vibration due to buffet. One of the techniques for active control of buffet is the use of smart structures with piezoelectric actuators. The actuators are embedded in the vertical tails in the most advantageous locations to reduce the response of the various structural modes of vibration due to buffet excitation. Ground and wind tunnel tests are necessary to ascertain the piezoelectric actuator's authority at full loads. It is also necessary to evaluate the increase in weight compared with the increase in damping. The results using two different types of piezoelectric actuators are encouraging. In-house wind tunnel tests on a 4.7% scale model of an F-15C aircraft were also conducted to ascertain the effects of tangential blowing and piezoelectric actuators. The tests were performed in the SARL (Subsonic Aerodynamics Research Laboratory) wind tunnel. Tangential blowing had some effect at lower angles of attack. A numerical investigation was conducted simultaneously. This report presents an overview of the buffet research at various organizations, results of the in-house wind tunnel test, and a summary of the computational effort.

Design, Manufacturing And Mechatronics - Proceedings Of The 2015 International Conference (Icdmm2015)

Design, Manufacturing And Mechatronics - Proceedings Of The 2015 International Conference (Icdmm2015)
Author: A Mehran Shahhosseini
Publisher: World Scientific
Total Pages: 1541
Release: 2015-09-23
Genre: Technology & Engineering
ISBN: 9814730521

This book brings together one hundred and seventy nine selected papers presented at the 2015 International Conference on Design, Manufacturing and Mechatronics (ICDMM2015), which was successfully held in Wuhan, China during April 17-18, 2015.The ICDMM2015 covered a wide range of fundamental studies, technical innovations and industrial applications in advanced design and manufacturing technology, automation and control system, communication system and computer network, signal and image processing, data processing and intelligence system, applied material and material processing technology, power and energy, technology and methods for measure, test, detection and monitoring, applied mechatronics, technology and methods for ship navigation and safety, and other engineering topics.All papers selected here were subjected to a rigorous peer-review process by at least two independent peers. The papers were selected based on innovation, organization, and quality of presentation.The proceedings should be a valuable reference for scientists, engineers and researchers interested in design, manufacturing and mechatronics, as well as graduate students working on related technologies.

Proceedings of the Third World Conference on Structural Control

Proceedings of the Third World Conference on Structural Control
Author: Fabio Casciati
Publisher: John Wiley & Sons
Total Pages: 214
Release: 2003-03-14
Genre: Technology & Engineering
ISBN: 9780471489801

Organized by the International Association for Structural Control(IASC), and sponsored by the European Association for the Controlof Structures (EACS), the recent world conference on structuralcontrol (3WCSC) brought together engineers, scientists, architects,builders and other practitioners interested in the general fieldsof active, hybrid and passive vibration control, health monitoringand damage detection, intelligent/smart materials and systems.Applications included buildings, bridges, space structures andcivil infrastructures under the action of dynamic environments(earthquake, wind, traffic...) and man-made loads. It provideda valuable forum for the discussion of the most pressing concernsin structural control and its related topics. The conference covered a wide range of topics including activeand semi-active control devices, passive control devices, controlalgorithms for linear and non-linear systems, modeling andidentification of structural systems, sensors, health monitoringand damage detection, benchmark test of building and bridges,innovative materials for structural control, applications toaerospace structures, applications to bridges, applications tocritical structures, external dynamic force characteristics andcontrollability issues, implications of severe ground motions, windforces, codes for structural control, and so forth. Suchcomprehensive treatment of the most innovative developments instructural control will make these volumes an informative referencefor all researchers and engineers interested in this area. Proceedings of the US - Europe Workshop On Sensors andSmart Structures Technology Como and Somma Lombardo, Italy In the last few years, significant progress has been made in thearea of sensing technology and structural healthmonitoring/condition assessment in the US and Europe. Innovativeconcepts involving new hardware, algorithms, and software have beenproposed. There have also been several full-scale trialimplementations of densely sensor-instrumented infrastructures andhealth monitoring systems, as well as case studies on bridges inEurope and in the US. Much can be learnt through US/European collaboration in the areaof experimental verification on small, medium, large and full-scaleprojects. Moreover, a common framework for expanded future jointresearch can be developed on the increased understanding achievedthrough mutual learning. This workshop consisted of seminar sessions on several themeswhich included innovative sensing hardware, advances in wirelesstechnology, and damage detection/characterization and conditionassessment methodologies. In addition, there were several workshopsessions devoted to summarizing the status of the sensors and smartstructures technologies in these topics, identifying the compellingresearch issues, and formulating an action plan withrecommendations for development and implementation through possiblecollaborative research projects and sharing of scientific data.

Applied Vibration Suppression Using Piezoelectric Materials

Applied Vibration Suppression Using Piezoelectric Materials
Author: Mehrdad R. Kermani
Publisher: Nova Publishers
Total Pages: 194
Release: 2008
Genre: Science
ISBN: 9781600218965

The aim of this book is to provide insight on the vibration problem in structurally flexible mechanisms, particularly robotic manipulators. The book covers different aspects of flexible structures. It partially includes the fundamental formulations for modelling of a flexible structure actuated with piezoelectric actuators. Mathematical modelling, when possible, as well as experimental techniques for obtaining models of flexible structures are discussed. Additionally, different control techniques adapted for flexible robotic manipulators equipped with piezoelectric actuators and sensors are covered in the book. Depending on the system, linear and non-linear control techniques for stabilising residual vibrations in the system are discussed.

Intelligent Materials

Intelligent Materials
Author: Mohsen Shahinpoor
Publisher: Royal Society of Chemistry
Total Pages: 555
Release: 2008
Genre: Science
ISBN: 0854043357

Leading experts in the fields of chemistry, physics and engineering have contributed to this book highlighting the importance of smart material science in the 21st century