This paper presents a new technique for directly designing a linear digital controller for a single-phase pulse width modulation (PWM) converter systems, based on closed-loop identification. The design procedure consists of three steps. First, obtain a digital current controller for the inner loop system by using the error space approach, so that the power factor of the supply is close to one. ...

This paper presents two methods for designing special purpose controllers for permanent magnet synchronous motor. The main target of the designed controllers is to reduce torque ripples of this type of motors. The first proposed adaptive method is based on two loop controllers (current controller and speed controller) in addition to using space vector pulse width modulation to maximize fundamen...

INTRODUCTION AND VARIABLE DEFINITION: Many upper-limb, multifunctional prosthesis controllers analyze fixed segments of EMG data collected from the residual musculature in an attempt to discern the intended movement of the user. However, many researchers have designed controllers with little or no regard for the delay the controller will introduce when operated in real-time. If the delay is too...

Psychophysics of reading with limited numbers of pixels has received increasing attention as the envisioned visual prosthesis offers a possibility to restore some useful reading ability to the blind through the pixelized vision it generates. This paper systematically studied how several important parameters of pixelized vision affect reading performance. A closed-circuit television reading plat...

A method for reducing the cross-terms in the WD with an adaptive frequency smoothing window is proposed in this paper. By using the short time Fourier spectrum of the input signal and some simple preprocessing steps, such as smoothing and peak labeling, the proposed method adaptively calculates the width of the frequency smoothing window. The simulation results of the linear frequency modulated...

Relation between roots location and spectrum: The first important thing in the use of windows for harmonic analysis, is the relation between the zeros of the windows, and their spectra. The plot in Figure 3.1 shows the spectrum of the rectangular window and the roots of this window. This plot outlines that the width of the main-lobe is obtained from the angle of the first root, in this case, Θ=...

A global non-singular terminal sliding mode controller for second order uncertain nonlinear dynamic systems, which enables enables finite time reachibility and elimination of the singularity problem associated with conventional terminal sliding mode control. The tracking precision problem is also explored. The relationship between the tracking precision and the width of the saturation function ...

We present a four-phase integrated buck converter in 45nm SOI technology. The controller uses unlatched pulse-width modulation (PWM) with nonlinear gain to provide both stable small-signal dynamics and fast response (~700ps) to large input and output transients. This fast control approach reduces the required output capacitance by 5X in comparison to a controller with latched PWM at similar ope...

We present a four-phase integrated buck converter in 45nm SOI technology. The controller uses unlatched pulse-width modulation (PWM) with nonlinear gain to provide both stable small-signal dynamics and fast response (~700ps) to large input and output transients. This fast control approach reduces the required output capacitance by 5X in comparison to a controller with latched PWM at similar ope...

Methods for measuring latency contrasts are evaluated against a new method utilizing the Dynamic Time Warping algorithm. They are applied on simulated data, for different signal to noise ratios and two sizes of window (broad vs narrow). The results are subjected to statistical and ROC analysis. The analysis suggests that DTW performs better than the other methods, being less sensitive to noise ...