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In this paper, an induction motor under mixed air gap eccentricity condition is simulated by modified winding function approach. Then, the stator current is used for detection of eccentricity condition by Fourier transform and the wavelet packet decomposition is proposed as a useful and correct method to detect and diagnose of eccentricity. And it is(More)
In this paper, an induction motor under mixed air-gap eccentricity condition is simulated using modified winding function approach. Then the stator line current is used for detection of eccentricity condition using Fourier transform. Wavelet packet decomposition may be proposed as a useful and proper method for the detection of eccentricity. Since in the(More)
Overshoot reduction of narrowband multi-tone ANC systems is investigated. The second-order perturbation method is proposed to estimate the poles of ANC transfer function. The phase differences of the estimated poles and the zeros corresponding to the input signal are then used in a parallel ANC system to compensate the secondary-path phases. Simulation(More)
In ANC systems in case of loudspeakers saturation the adaptive algorithm may diverge due to nonlinearity. FX-LMS algorithm is widely used for feed-forward ANC systems ; its cost function is conventionally chosen independent of control signal magnitude, and hence the control signal may increase unlimitedly. In this paper a new cost function is proposed that(More)
This paper presents a robust controller design for the active noise control system using feedforward strategy. A robust design for uncertain systems assures robust stability and robust performance considering uncertainty. There are several approaches for robust controller design like H/spl infin/, /spl mu/,... In this paper our design is based on /spl mu/(More)
In this paper, an induction motor under mixed air-gap eccentricity condition is simulated using modified winding function approach. Then the simulated stator line currents and voltages are used as outputs and inputs to obtain a linear model. Modified recursive least square is used to estimate the model parameters for an ARX model of the induction motor.(More)
This paper presents an analysis of effects of dynamic air-gap eccentricity on the performances of a 6/4 Switched Reluctance Machine (SRM) through finite element analysis (FEA) based on a FEMM package associated to MATLAB/SIMULINK package software. Among the various Time-Frequency methods used for detection of defects, the Time-Frequency Representation (TFR)(More)
In this paper a simple method for multichannel active noise control is introduced. The proposed structure is a combination of an adaptive FIR filter, based on the FXLMS algorithm, and the ALIGN algorithm resulting in decoupling matrix for secondary path transfer function. This structure converts a multi-channel ANC system to decoupled systems which results(More)
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