Smart Helicopter Rotor with Piezoelectric Bender Actuated Trailing-edge Flaps
Author: Nikhil Koratkar
Publisher:
Published: 2000
Total Pages: 672
ISBN-13:
DOWNLOAD EBOOKRead and Download eBook Full
Author: Nikhil Koratkar
Publisher:
Published: 2000
Total Pages: 672
ISBN-13:
DOWNLOAD EBOOKAuthor: Ranjan Ganguli
Publisher: Springer
Published: 2015-12-16
Total Pages: 264
ISBN-13: 3319247689
DOWNLOAD EBOOKExploiting 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: Inderjit Chopra
Publisher: Cambridge University Press
Published: 2014
Total Pages: 925
ISBN-13: 052186657X
DOWNLOAD EBOOKThis 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: Eric Frederick Prechtl
Publisher:
Published: 2000
Total Pages: 371
ISBN-13:
DOWNLOAD EBOOKAuthor: Ahmed Khairy Noor
Publisher: AIAA
Published: 2000
Total Pages: 472
ISBN-13: 9781600864407
DOWNLOAD EBOOKAuthor: Yuji Matsuzaki
Publisher: CRC Press
Published: 2001-03-01
Total Pages: 658
ISBN-13: 9781587161032
DOWNLOAD EBOOKAuthor:
Publisher:
Published: 1999
Total Pages: 0
ISBN-13:
DOWNLOAD EBOOKOne concept being considered for active noise and vibration control of helicopter rotors is a trailing edge flap design driven by a high-displacement piezoelectric actuator device. The proposed device requires an 800-V power supply and draws a current on the order of .3 A. Thus, depending on the duty cycle and efficiency of the mechanism, some portion of the 240 W of electrical input energy will be converted to heat. This study provides an initial estimate of the temperatures that may be encountered if no provisions are made for cooling the actuator. Also included are a discussion of the heat transfer calculation, assuming conduction and radiation as the dominant modes, and a description of HEAT 8, the computer code used.
Author: Nesbitt Hagood IV
Publisher: CRC Press
Published: 1999-03-11
Total Pages: 822
ISBN-13: 9781566767552
DOWNLOAD EBOOKAuthor: Hartmut Janocha
Publisher: Springer Science & Business Media
Published: 2007-10-10
Total Pages: 554
ISBN-13: 3540719679
DOWNLOAD EBOOKAdaptronic 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.