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In the information processing done by biological organisms, stochastic resonance (SR) can enhance sensitivity by superimposing proper noise upon undetectable weak signals to detect that signal. In tactile sensing, since noise inevitably becomes mixed by contact with an object and a sensor's movement on it, sensing accuracy can be increased by SR. In the present research, we perform a series of psychophysical...
Because of the nonlinearity of digital PWM generator and the effect of power supply noise in power stage, the error is introduced into digital class D power amplifier. A method used to eliminate the error is presented in this paper, and it is easy to implement. Based on this method, a digital class D power amplifier is designed and simulated, the simulation results indicate this method can basically...
Reducing maintenance cost is very important for electric power utilities in order to have the advantage in competitive power market. Besides the reliability of facilities is required to be kept in certain level. In such situation, it is necessary to know the machine condition surely in order to conduct condition based maintenance (CBM).
In order to eliminate noise and singularities from dynamical test data, this paper employs spatial correlation of wavelet coefficients to remove noise by the feature, which noise-decomposed coefficients using wavelet transform are not correlative at the different finest scales, and uses the characteristic of the singularities through decomposing wavelet to eliminate these singularities, that is denoising...
A method for identification of a synchronous generator is suggested in this paper. The method uses the theoretical relations of machine parameters and the new wavelet network structure combining a polynomial model with multi-resolution half-complex wavelet decomposition to find the state space model of the system. The proposed structure takes the advantage of both polynomial models and wavelet networks...
The on-line fault diagnosis technique based on search coil method for detecting inter-turn short circuits in turbo-generator rotor winding is used. Based on completely different properties of induced electric potential signals in the air gap and noise characteristic of the generator operated in different conditions is analyzed, wavelet transform and Mallatpsilas local maximum de-noising algorithm...
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