A novel adaptive control strategy for wide-speed-range aero-engine rotor systems with elastic support-dry friction dampers

Rotor vibration can be effectively reduced by the elastic support-dry friction damper (ESDFD) due to its ability to provide both stiffness and damping with active control capability. However, the control strategy and coupled analysis still need to be optimized to face the challenge of vibration control of wide-speed-range aero-engines under variable operating conditions. To optimize rotor performance under varying imbalance conditions, a full-speed multi-damper control (FSMDC) strategy is proposed. By analyzing the imbalance, the control method, and the coupled relationship between stiffness and damping, the numerical results show that the control strategy can make the rotor operate stably and safely at the critical speed, with a reduction of 49.43 % in the control time and a reduction of 0.3 % in vibration amplitude. These findings provide a solid foundation for the development of future control strategies that incorporate variable stiffness and damping, offering new insights into the coupled mechanisms involved. Moreover, a unified performance evaluation standard for ESDFD is introduced, based on the principles of piezoelectric ceramics and the vibration damping characteristics of the damper. Furthermore, this adaptive vibration control approach is applicable to rotor systems equipped with ESDFD and many other complex rotating structures, such as flywheel energy storage systems as well as wind power generator systems.