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Time Series Bispectrum Analysis of A Magnetorheological Vibrating Platform

A magneto-rheological vibrating platform for semiactive vibrating control is presented. Dynamic characteristics and control of the MR damper can be analyzed varying the frequency, amplitude and damp. Using only the sampled output displacement signals and assuming a nonGaussian white noise interferes with the system, a time series model is conducted, bispectrum analysis is introduced to describe phase coupling, restrain Gaussian noise and reserve phase component. The peaks of bispectra occur in an inner triangular domain, demonstrate that the damping process is nonGaussian and nonlinear coupling do exist in the system