Smart Helicopter Rotors

by Ranjan Ganguli (Author), Dipali Thakkar (Author), Sathyamangalam Ramanarayanan Viswamurthy (Author)
Shows the reader how modelling, control and optimization of smart helicopter rotors can reduce vibration and thereby increase ride comfort
Presents new algorithms for full-authority control of rotor-blade flaps and compensation for hysteresis nonlinearity in piezoelectric actuators
Explores the practicability of induced-shear actuation and its advantages in obviating vibration caused by active stall

About this book
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.

Number of Illustrations and Tables
213 illus.
Topics
Aerospace Technology and Astronautics
Vibration, Dynamical Systems, Control
Optical and Electronic Materials
Control

More info and Hardcover at Springer

Donate to Support :)