A Novel Vibration Control System for Active Mass Drivers Based on Dynamic Fractional-order Type-2 Fuzzy Model and Adaptive Fractional Derivative
摘要
Active mass drivers (AMDs) are effective for reducing vibrations of structural systems under excitations such as wind and earthquakes. However, their control remains challenging due to uncertain dynamics, un-modeled high-frequency perturbations, unreliable predefined models, and natural disturbances. This study proposes a novel adaptive intelligent control approach that minimizes reliance on predefined models and adapts in real time to perturbations.
Methods:The dynamics of the system are modeled online as a first-order fractional-order nonlinear system, where the fractional derivative order is adaptively updated using an Unscented Kalman Filter (UKF). Type-2 fuzzy systems (T2FSs) identify nonlinearities in the fractional-order model. Fractional Lyapunov-based adaptation laws minimize estimation errors and guarantee stability. Additionally, a supplementary parallel controller is designed to manage uncertain bounds of nonlinearities, with these bounds adaptively estimated through an adaptation law.
Results:Numerical simulations and experimental studies validate the proposed algorithm. Results demonstrate superior vibration reduction compared to conventional controllers. The method achieves up to an 85% reduction in peak floor displacement under impulse excitation and maintains stability under seismic and harmonic disturbances where traditional methods fail.
Conclusions:The proposed adaptive intelligent control strategy enhances vibration attenuation and structural resilience by enabling real-time adaptive modeling and robust handling of nonlinearities and uncertainties. These improvements establish the method as a more effective solution than conventional approaches for structural vibration control.
Supplementary material:A video demonstration of the implementation is available at https://youtube.com/shorts/fWjeZ2uXdh8?feature=share.