Active Control of Helicopter Ground Resonance with Lead-Lag Actuators

Authors : Ilkay Kurt

Pages : 83-87

View : 13 | Download : 7

Publication Date : 2018-09-27

Article Type : Research

Abstract :The coupling between the low frequency lead-lag motion of rotor blade and the frequency of fuselage is the phenomenon of ground resonance. This mechanical instability can lead to the total destruction of the aircraft if the vibrations are not reduced in time. Differential equations of motion of the simple ground resonance model are derived by using the Lagrange method. Five degrees of freedom coupled rotor/fuselage model with lead-lag actuators in the root of each blade is simulated. Fuzzy Logic Controller is used for the purpose of suppressing the ground resonance. The results show that existence of the active lead-lag control system prevents the ground resonance from happening while the helicopter is in touch with the ground.
Keywords : Helicopter ground resonance, lead-lag, coupled rotor/fuselage model, Fuzzy Logic, vibration control