Fuzzy control study on a transformer vibration isolation system

Vibration generated by large power transformer will produce environmental vibration and noise pollution through solid spread or airborne transmission. Based on the vibration analysis of the transformer, a vertical smart vibration isolator comprised of magnetorheological elastomer (MRE) was developed, and its dynamic performance was tested and analyzed. The results revealed that the maximum increase of the effective stiffness is 333.58% with the current increasing from 0 A to 1.5 A. Besides, the simulation experiments of integrated transformer-isolator-base isolation system were carried out by using the semi-active fuzzy logic controller (FLC). Simulation results showed that the acceleration response is reduced by 26.7% at most, which verifies the effectiveness of designed semi-active FLC. Besides the intrinsic importance for contributing to the smart vibration control of transformer system, this research may offer a reference for other semi-active vibration isolation systems.