Distance relays are used to protect EHV and HV Transmission lines. Over the past decades many algorithms have emerged for digital distance relays. These are based on the calculation of the transmission line impedance from the relaying to fault points. In this paper a novel method for digital distance relaying is proposed. In the method the tracking procedure is implemented. The method uses the ...

This paper presents a new sensor arrangement and feedback controller for hysteresis, creep and vibration in piezoelectric actuators. A force and strain sensor is combined to provide both extremely low noise and high stability. The proposed technique is demonstrated on a nanopositioning platform with a range of 10 μm and a resonance frequency of 2.4 kHz. In closed-loop, the controller damps the ...

This paper is concerned with the problems of global stabilization and restricted tracking for a multiple oscillator systembybounded feedback. A nonlinear feedback law consisting of nested saturation functions is proposed to achieve global stabilization. To improve the transient performance of the closed-loop system, the parameters in this feedback law can be tuned to assign the poles of the clo...

In this article, we describe a slot-synchronization algorithm for optical signals transmitted using pulse-position modulation (PPM). This algorithm utilizes PPM symbol decisions in order to generate a slot-timing error signal without the use of guard time around the transmitted laser pulse or synchronization symbols. We derive expressions for the open-loop characteristic curve of the error sign...

The sliding-mode controller (SMC) for the lateral motion control problem of Four Driving-Steering Wheels (4DW/SW) vehicle is presented in this paper. The lane centerline tracking is the main control performance. The dynamic model of the vehicle has been taken into account. Closed-loop robustness to uncertainties is achieved. The lane centerline tracking is achieved using look-ahead techniques. ...

The output power produced by high-concentration solar thermal and photovoltaic systems is directly related to the amount of solar energy acquired by the system, and it is therefore necessary to track the sun's position with a high degree of accuracy. Many systems have been proposed to facilitate this task over the past 20 years. Accordingly, this paper commences by providing a high level overvi...

A novel non-coherent tracking technique for the RAKE receiver is introduced that has a good tracking performance even if multipaths cannot be resolved. Multiple chip-spaced correlators are used on unresolvable multipaths to provide estimates with uncorrelated noise. It is shown that the proposed tracker finds the pseudonoise code timing that maximizes the output of the maximal ratio combiner. T...

Distance relays are used to protect EHV and HV Transmission lines. Over the past decades many algorithms have emerged for digital distance relays. These are based on the calculation of the transmission line impedance from the relaying to fault points. In this paper a novel method for digital distance relaying is proposed. In the method the tracking procedure is implemented. The method uses the ...