Aeroelastic analysis of rotors with trailing edge flaps using comprehensive codes

The present study covers the analysis of a bearingless rotor with trailing edge flaps for active control of rotor aerodynamics and dynamics. The flaps are actuated by piezoelectric actuators installed in the blade. Two aeroel astic codes are used to explore the aerodynamics and dynamics of this rotor . CAMRAD/JA is based on the modal approach and has been modified to account for the flap aerodynamics. CAMRAD II is based on the finite element method and allows for complete aeroelastic modeling of the flap. Results show tha t the simple but efficient code can be used to predict rotor response and c onduct concept development and active control law development. The advanced code should be used to obtain more accurate loads and to study the coupled blade/flap dynamics and stability.