Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
Fault Tolerant Suppression of Ground Resonance in Helicopters
Submission Author:
Gustavo Abreu , SP
Co-Authors:
José Augusto Ignacio da Silva, Gustavo Abreu, Douglas Bueno
Presenter: Gustavo Abreu
doi://10.26678/ABCM.COBEM2019.COB2019-0418
Abstract
Ground Resonance (GR) in helicopters is a potentially catastrophic instability commonly caused by coalescence of the regressive cyclic blade lag mode with the fuselage motion in certain rotor speed ranges. It can limit the helicopter operational envelope and become the design of this type of vehicle a difficult task. This works introduces an alternative methodology to design an active control system to asymptotically stabilize GR of helicopter considering actuators faults in the actuators. The proposed approach can suppress this instability in all rotor speed range by using only one fault-tolerant control gain. The Lyapunov stability criteria is used to design the controller based on Linear Matrix Inequalities (LMI). A polytopic representation of the GR boundary and the actuators faults are used. Using convex optimization a fault-tolerant control gain is computed and the all unstable rotor speed range is stabilized. A numerical simulations are carried out to demonstrate the effectiveness of this methodology. The results confirm the viability of the proposed approach to design active fault-tolerant controllers to suppress the GR.
Keywords
Ground Resonance Helelicopter, Actuators Faults, Polytopic Representation, Linear Matrix Inequalities
