Development of Antiresonance-Enforced Active Vibration Absorber System.

We propose an antiresonance-enforced active vibration absorber system, in which the passive dynamic vibration absorber is weakly damped and tuned to the peak frequency of the vibration of the main mass, and then, the active control system of the optimum design with a freqtuency-shaped cost functional is added to enforce the antiresonance. This system is a variation of the hybrid vibration absorber but is more effective than the conventional one, especially when the external excitation force is a harmonic wave or has a sharp peak in the spectrum. With the cross-correlation function, the system can automatically tune the antiresonant frequency to the peak frequency, and reduce the vibration effectively even when the peak frequency of the external excitation force changes In the paper, the theoretical analysis of the system, the digital realization and control stability are discussed, Finally, the experimental results, which show the effectiveness of the mechanism, are given.