VIBRATION CONTROL OF A SWASHPLATELESS COAXIAL ROTOR

摘要

A rotary wing aircraft is provided including a dual counter-rotating, coaxial rotor system having an upper rotor system and a lower rotor system rotatable about a common axis. A plurality of blade assemblies is mounted to a portion of either the upper rotor system or the lower rotor system. A plurality of individually controllable actuators is coupled to each of the plurality of blade assemblies. Each of the plurality of actuators is configured to control movement of the coupled blade assembly about a pitch axis. The rotary-wing aircraft additionally includes a sensor system within an airframe. A higher harmonic control (HHC) controller is arranged in communication with the sensor system and the plurality of actuators to individually control the upper rotor system and the lower rotor system to reduce vibration.

主权项

1. A rotary wing aircraft comprising:
a dual, counter-rotating, coaxial rotor system having an upper rotor system and a lower rotor system rotatable about a common axis relative to an airframe; a plurality of blade assemblies mounted to a portion of either the upper rotor system or the lower rotor system; a plurality of individually controllable actuators, each being coupled to one of the blade assemblies and configured to control movement of the coupled blade assembly about a pitch axis. a sensor system within an airframe; and a controller in communication with the sensor system and the plurality of actuators to individually control the upper rotor system and the lower rotor system to reduce vibration within the airframe.