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—This paper considers the issue of modeling the pivot nonlinearity in a typical hard disk drive, taking into account vis-cous friction, Coulomb friction and hysteresis effects. It presents a nonlinear compensator design, based on a proposed model, to make the compensated system behave like a double integrator regardless of the magnitude of the input(More)
There many researches about modulation mode classification of the MPSK signals, but these studies pay few attentions to some especial MPSK signals such as OQPSK or π/4QPSK. However, the signals are very important in the digital communications. The method of classification of the QPSK, OQPSK, π/4QPSK and 8PSK has discussed in this paper, because(More)
In this paper, the modeling issue of the pivot nonlin-earity in a typical hard disk drive is considered. Vis-cous friction, Coulomb friction and hysteresis effects are taken into account. Based on the proposed model, a nonlinear compensator is designed to make the compensated system to behave like a double integrator regardless of the magnitude of the input(More)
Sound waves in audible range are used for agglomeration monitoring and early warning of fluidized bed for the ethylene polymerization. According to the energy distribution in the frequency domain and the shift characteristics of the power spectral centroid of the normal and agglomeration signals, the sampling rate and signal pre-processing approaches are(More)
This paper presents a new two-direction green wave optimization method to solve the coordination control problem of urban arterial traffic. An optimization method based on MATLAB graphical computation was proposed to solve the synchronous optimization for five parameters including the phase, the phase sequence, the offset, the cycle time and the split.(More)
Practical signals such as communication and radar signals turn out to be non-stationary and nonlinear time series, and estimating instantaneous parameters of such signals in time domain will benefit detecting and identifying specific emitters, such as radio stations and aerospace targets. However, conventional methods such as Wavelet and Wigner-Ville(More)
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