Suppression of Residual Unbalance Moments in Rotating Medical Structures Using Adaptive Control

Residual unbalance moments are a major source of vibration in rotating medical devices. This study proposes an adaptive control strategy to suppress residual unbalance moments based on real-time vibration feedback. A rotating structure model with distributed mass eccentricity was established, and adaptive gain tuning was implemented using acceleration signals sampled at 2 kHz. Simulations under three unbalance levels (120, 220, and 350 g·mm) show that the proposed method reduced peak vibration acceleration from 1.42 m/s² to 0.79 m/s² on average, corresponding to a 44.4% reduction. The approach demonstrates strong robustness against speed variation and sensor noise, making it suitable for medical rotating equipment.