• Anglický jazyk

Aeromechanical Stability Augmentation ThroughSemi-Active Control

Autor: Sandeep Agarwal

Helicopter rotors have traditionally been equippedwith passive dampers for aeromechanical stability. These passive systems have fixed characteristics, andadd to mechanical complexity and high maintenancecost. Furthermore, they are unable to change tocompensate... Viac o knihe

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O knihe

Helicopter rotors have traditionally been equippedwith passive dampers for aeromechanical stability. These passive systems have fixed characteristics, andadd to mechanical complexity and high maintenancecost. Furthermore, they are unable to change tocompensate for an unexpected loading trends astypically encountered by a rotary wing vehicle. Semi-active control strategies are dissipative innature, inherently stable, and require a littleenergy to operate. Hence, they appear to beparticularly promising in addressing anumber of the challenges facing active controlstrategies, in that the devices are low power,fail-safe, and reliable. In this study, authorinvestigates friction based semi-active approach forground resonance stability augmentation and proposesnovel strategies for the adaptive, selective andindividual damping control. The effectiveness ofthese control strategies is validated on acomprehensive multibody system model of an armyhelicopter. The analytical study is supplemented witha novel design of a semi-active lead lag damper andvarious aspects of its design in application tocommercial rotors are discussed.

  • Vydavateľstvo: VDM Verlag
  • Rok vydania: 2009
  • Formát: Paperback
  • Rozmer: 220 x 150 mm
  • Jazyk: Anglický jazyk
  • ISBN: 9783639175325

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