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Introduction

  • Ranjan GanguliEmail author
  • Dipali Thakkar
  • Sathyamangalam Ramanarayanan Viswamurthy
Chapter
  • 1.4k Downloads
Part of the Advances in Industrial Control book series (AIC)

Abstract

Rotorcraft are widely used in civilian, military, and commercial applications due to their ability to perform remarkable maneuvers such as hover, vertical takeoff/landing, and low-speed flight. Such unique abilities set them apart from their fixed-wing counterparts. However, these advantages come at the cost of complex aeroelastic phenomena, instabilities, and severe vibration and noise issues. High noise levels greatly restrict the use of helicopters over densely populated and urban areas. High vibration levels directly lead to passenger discomfort and high maintenance costs. This chapter provides the necessary background for the smart rotor concepts. The chapter is organized as follows. Helicopter vibration problem is explained in Sect. 1.1. Section 1.2 explains the passive control of vibration. Section 1.3 explains the active control of vibration. Section 1.4 presents actuation of trailing-edge flap. Section 1.5 explains the induced shear strain actuation. Section 1.6 presents the optimal placement of actuators in active structures. Section 1.7 explains the actuator hysteresis model. Section 1.8 explains the active twist rotor. Suppression of dynamic stall-induced vibration is explained in Sect. 1.9. Section 1.10 gives the organization of the book.

Keywords

Rotor Blade Pitching Moment Main Rotor Helicopter Rotor Active Twist 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  • Ranjan Ganguli
    • 1
    Email author
  • Dipali Thakkar
    • 2
  • Sathyamangalam Ramanarayanan Viswamurthy
    • 3
  1. 1.Department of Aerospace EngineeringIndian Institute of ScienceBangaloreIndia
  2. 2.Department of Aeronautical EngineeringSardar Vallabhbhai Patel Institute of TechnologyVasadIndia
  3. 3.Advanced Composites DivisionCSIR-National Aerospace LaboratoriesBangaloreIndia

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