TRABALHOS PUBLICADOS
2008 |
Individual Blade Root Control of Helicopter Blade Sailing for Hingeless Shipboard Rotors Proceedings Article Ramos, Roberto Luiz Cunha Barroso; Andrade, Donizeti; Góes, Luiz Carlos Sandoval Resumo | Links | BibTeX | Tags: aeroservoelasticity, blade sailing, hingeless rotor, individual blade root control, Shipboard helicopter @inproceedings{Roberto2008Shipboardb, This paper investigates an individual-blade-root- control approach to the reduction of helicopter blade sailing in hingeless rotors, considering steady flow conditions during theoretical engagement shipboard operations and using aeroservoelasticity principles. The aeroelastic control law individual-blade-root synthesis yields a flap-state-feedback lift/angle-of-attack compensation whose controller for the parameters are associated with the damping/stiffness enhancement of the flapping motion. The simulation results show that the proposed aeroservoelastic controller can obtain blade-sailing reduction of nearly 30% in upward and downward deflections at severe wind-over-deck conditions by using low blade pitch input limits of the actuators. This blade-sailing reduction can prevent tunnel/tail-boom strikes from occurring. Keywords Shipboard helicopter, blade sailing, individual blade root control, hingeless rotor, aeroservoelasticity. |