This paper presents a speed sensorless direct torque control scheme using space vector modulation (DTC-SVM) for permanent magnet synchronous motor (PMSM) drive based a Model Reference Adaptive System (MRAS) algorithm and stator resistance estimator. The MRAS is utilized to estimate speed and stator resistance and compensate the effects of parameter variation on stator resistance, which makes fl...

In this paper, a fast algorithm is proposed for block motion estimation for video sequences. The proposed algorithm is proven to be equivalent to exhaustive search. In a multiresolution approach, it uses mathematically derived threshold to prune search candidates whose low-resolution versions are too far from the low resolution version of the block for which a best match is sought. Experimental...

We present a new packet dispersion based active probing scheme for available bandwidth estimation that (1) overcomes system I/O bandwidth limitations on high-speed (>1Gbps) networks and (2) determines the location of a path’s tight link. The scheme is based on the packet-tailgating technique earlier used for link capacity estimation and topology identification. Available bandwidth estimation an...

Reliable estimates of the speed or, equivalently, the perceived channel Doppler spread, are of great importance in mobile cellular systems for optimization of wireless receiver algorithms such as channel estimation, handoff algorithms etc. In this paper we propose a novel speed estimation algorithm based on the derivative of the received channel envelope. We characterize the effects of additive...

The clock signal has always been a matter of concern for most of the high–speed functions of the synchronous integrated circuits as it decides the speed regularities. To reduce the irregularities of this signal, the clock skew is one of the major constraints to be taken care of. In this paper, an efficient technique for the estimation of this clock skew has been introduced and VHDL has been use...

This work analyzes the advantages of Artificial Neural Networks applied in development of a technique for estimation rotor angle and speed, transient stability assessment and control in real-time in Synchronous Generator. Two multi layered feed-forward Artificial Neural Networks are used for this technique. One is used for the estimation of rotor angle and another for the estimation of rotor sp...

In this letter, a new sliding-mode sensorless control algorithm is proposed for the field-oriented induction machine drive. In the proposed algorithm, the terms containing flux, speed, and rotor time constant, which are common in both current and flux equations, in the current model of the induction machine are estimated by a sliding function. The flux and speed estimation accuracy is guarantee...

This contribution presents a powerful method for real-time capable global motion estimation. Up to now no further solutions are known to the authors. Global motion estimation is a great tool in MPEG-4 coding process to improve overall visual quality. The main disadvantage of the reference implementation in the current Verification Model is an unacceptable low computation speed. By means of cons...

existence of capacity drop phenomenon, as the difference between pre-queue and queue discharge flow rates, has been one of the controversial concepts of traffic engineering. several researches have focused on capacity drop existence and also its estimation issues. this paper aims to estimate capacity drop based not only on a comparison between breakdown and queue discharge flow rates, but also ...

While often overlooked, one of the prerequisites for high-speed amplitude modulation atomic force microscopy is a high-bandwidth amplitude estimation technique. Conventional techniques, such as RMS to DC conversion and the lock-in amplifier, have proven useful, but offer limited measurement bandwidth and are not suitable for high-speed imaging. Several groups have developed techniques, but many...