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| Author | : Alexandre René Alain Paternoster |
| Publisher | : |
| Total Pages | : 156 |
| Release | : 2013 |
| Genre | : |
| ISBN | : 9789036535137 |
| Author | : |
| Publisher | : |
| Total Pages | : 15 |
| Release | : 2006 |
| Genre | : |
| ISBN | : |
The present work focuses on the design, construction and testing of a smart actuating system for the cyclic and collective control of helicopter blades for UAV applications. The actuating mechanism consists of a multilayered actuator made of PZT 5H layers bonded together on an aluminum substrate. The design of the actuator was performed using finite element techniques and introducing coupling mechanics in order to improve the simulation capabilities of the numerical tools. The construction and implementation of the smart actuation system are presented and finally static tests were performed (no blade rotation), mostly for the investigation of the cyclic pitch control. The actuation signal send to the piezoelectric actuator was in the frequency domain of 10-15 Hz, that covers the area of 700-750 rpm which is considered as the operational rotational velocity of the blade. The combination of velocity and radius of the rotor (1 m) impose severe loading to the actuator, however, the intelligent use of piezoelectric materials leads to functional structures that fulfill the design requirements.
| Author | : Giovanni Berselli |
| Publisher | : BoD – Books on Demand |
| Total Pages | : 732 |
| Release | : 2012-10-17 |
| Genre | : Technology & Engineering |
| ISBN | : 9535107984 |
The objective of the present book, which tries to summarize in an edited format and in a fairly comprehensive manner, many of the recent technical research accomplishments in the area of Smart Actuators and Smart Sensors, is to combine researchers and scientists from different fields into a single virtual room. The book hence reflects the multicultural nature of the field and will allow the reader to taste and appreciate different points of view, different engineering methods and different tools that must be jointly considered when designing and realizing smart actuation and sensing systems.
| Author | : Ranjan Ganguli |
| Publisher | : Springer |
| Total Pages | : 264 |
| Release | : 2015-12-16 |
| Genre | : Technology & Engineering |
| ISBN | : 3319247689 |
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.
| Author | : A. Paternoster |
| Publisher | : |
| Total Pages | : |
| Release | : 2012 |
| Genre | : |
| ISBN | : 9789535107989 |
| Author | : Inderjit Chopra |
| Publisher | : Cambridge University Press |
| Total Pages | : 925 |
| Release | : 2014 |
| Genre | : Science |
| ISBN | : 052186657X |
This book focuses on smart materials and structures, which are also referred to as intelligent, adaptive, active, sensory, and metamorphic. The ultimate goal is to develop biologically inspired multifunctional materials with the capability to adapt their structural characteristics, monitor their health condition, perform self-diagnosis and self-repair, morph their shape, and undergo significant controlled motion.
| Author | : Gordon J. Leishman |
| Publisher | : Cambridge University Press |
| Total Pages | : 860 |
| Release | : 2006-04-24 |
| Genre | : Science |
| ISBN | : 9780521858601 |
Written by an internationally recognized teacher and researcher, this book provides a thorough, modern treatment of the aerodynamic principles of helicopters and other rotating-wing vertical lift aircraft such as tilt rotors and autogiros. The text begins with a unique technical history of helicopter flight, and then covers basic methods of rotor aerodynamic analysis, and related issues associated with the performance of the helicopter and its aerodynamic design. It goes on to cover more advanced topics in helicopter aerodynamics, including airfoil flows, unsteady aerodynamics, dynamic stall, and rotor wakes, and rotor-airframe aerodynamic interactions, with final chapters on autogiros and advanced methods of helicopter aerodynamic analysis. Extensively illustrated throughout, each chapter includes a set of homework problems. Advanced undergraduate and graduate students, practising engineers, and researchers will welcome this thoroughly revised and updated text on rotating-wing aerodynamics.
| Author | : E.E. Gdoutos |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 1003 |
| Release | : 2007-12-06 |
| Genre | : Science |
| ISBN | : 1402062397 |
This volume contains two-page abstracts of the 482 papers presented at the latest conference on the subject, in Alexandroupolis, Greece. The accompanying CD contains the full length papers. The abstracts of the fifteen plenary lectures are included at the beginning of the book. The remaining 467 abstracts are arranged in 23 tracks and 28 special symposia/sessions with 225 and 242 abstracts, respectively. The papers of the tracks have been contributed from open call, while the papers of the symposia/sessions have been solicited by the respective organizers.
| Author | : Pascual Marqués |
| Publisher | : John Wiley & Sons |
| Total Pages | : 788 |
| Release | : 2017-04-19 |
| Genre | : Technology & Engineering |
| ISBN | : 1118928717 |
Comprehensively covers emerging aerospace technologies Advanced UAV aerodynamics, flight stability and control: Novel concepts, theory and applications presents emerging aerospace technologies in the rapidly growing field of unmanned aircraft engineering. Leading scientists, researchers and inventors describe the findings and innovations accomplished in current research programs and industry applications throughout the world. Topics included cover a wide range of new aerodynamics concepts and their applications for real world fixed-wing (airplanes), rotary wing (helicopter) and quad-rotor aircraft. The book begins with two introductory chapters that address fundamental principles of aerodynamics and flight stability and form a knowledge base for the student of Aerospace Engineering. The book then covers aerodynamics of fixed wing, rotary wing and hybrid unmanned aircraft, before introducing aspects of aircraft flight stability and control. Key features: Sound technical level and inclusion of high-quality experimental and numerical data. Direct application of the aerodynamic technologies and flight stability and control principles described in the book in the development of real-world novel unmanned aircraft concepts. Written by world-class academics, engineers, researchers and inventors from prestigious institutions and industry. The book provides up-to-date information in the field of Aerospace Engineering for university students and lecturers, aerodynamics researchers, aerospace engineers, aircraft designers and manufacturers.
| Author | : Laxminarayana Saggere |
| Publisher | : |
| Total Pages | : 300 |
| Release | : 1998 |
| Genre | : Smart structures |
| ISBN | : |
