Application of an active electromagnetic vibration absorber in vibration suppression

A novel active electromagnetic vibration absorber (AEMVA) is developed. It is shown that for suppression of steady-state response to a harmonic excitation, a proportional and derivative feedback control is equivalent to a time-delayed control. The study of the stability issue focuses on a conflicting goal of achieving the marginal stability of the time-delayed vibration absorber and the stability of the combined system. The achievability of the ideal performance of the time-delayed vibration absorber is investigated. An experimental study is conducted to test the proposed AEMVA. An online tuning algorithm is proposed. The experimental results show that with the proposed tuning strategy, the AEMVA can maximize the vibration suppression while maintaining the system stability. Copyright (C) 2008 John Wiley & Sons, Ltd.