AR trispectral characteristics of magnetorheological steering control device

In this paper, the work principle of magnetorheological (MR) steering control device with double driving discs rotating at the same speed in the opposite directions is presented. The dynamic model of the steering control system consists of the viscous part between the output angle and the magnetorheological torque, and the electromagnetic part between the MR torque and the current strength. An autoregressive(AR) model of the fourth order cumulant and the trispectrum function which were utilized for analyzing the dynamic characteristics of the MR steering control device by merely using the sampled output torque signals have been obtained when a zero mean non-Gaussian white noise interferes with the rotary discs system. The experimental and theoretical results show that the time series model, the parametric trispectrum and its slices are helpful to analyze the MR steering control device. The measurement and analysis process based on virtual instruments are automatically controlled by computer in this paper.