Smart Actuation Mechanisms for Helicopter Blades
Author : Alexandre René Alain Paternoster
Publisher :
Page : 156 pages
File Size : 29,43 MB
Release : 2013
Category :
ISBN : 9789036535137
Author : Alexandre René Alain Paternoster
Publisher :
Page : 156 pages
File Size : 29,43 MB
Release : 2013
Category :
ISBN : 9789036535137
Author : A. Paternoster
Publisher :
Page : pages
File Size : 16,87 MB
Release : 2012
Category :
ISBN : 9789535107989
Author : Ranjan Ganguli
Publisher : Springer
Page : 264 pages
File Size : 24,74 MB
Release : 2015-12-16
Category : 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 :
Publisher :
Page : 15 pages
File Size : 49,72 MB
Release : 2006
Category :
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
Page : 732 pages
File Size : 17,28 MB
Release : 2012-10-17
Category : 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 :
Publisher :
Page : 68 pages
File Size : 49,97 MB
Release : 1996
Category :
ISBN :
Author : Matthew Edward Fox
Publisher :
Page : 168 pages
File Size : 31,78 MB
Release : 1993
Category :
ISBN :
Author : Eric Frederick Prechtl
Publisher :
Page : 371 pages
File Size : 19,42 MB
Release : 2000
Category :
ISBN :
Author : Hartmut Janocha
Publisher : Springer Science & Business Media
Page : 554 pages
File Size : 35,18 MB
Release : 2007-10-10
Category : Technology & Engineering
ISBN : 3540719679
Adaptronic structures and systems are engineered to adjust automatically to variable operating and environmental conditions, through the use of feedback control. The authors of this book have taken on the task of comprehensively describing the current state of the art in this highly modern and broadly interdisciplinary field. The book presents selected examples of applications, and goes on to demonstrate current development trends.
Author : Inderjit Chopra
Publisher : Cambridge University Press
Page : 925 pages
File Size : 13,39 MB
Release : 2014
Category : 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.