The design of a synchronous system having a global clock must account for the phase shifts experienced by the clock signal (clock skew) in its distribution network. As clock speeds and system diameters increase, this requirement becomes increasingly constraining on system designs. Two currently used approaches to this problem are to minimize skew by equalizing electrical path delays, and to re-...

The objective of the present study was to deal with the rotordynamics of the rotor of an ultra-high speed PM type synchronous motor-generator for a 500 W rated micro gas turbine generator. This paper introduces dynamic analysis, and experiments on the motor-generator. The focus is placed on an analytical approach considering the mechanical dynamic problems. It is essential to deal with dynamic ...

In this paper, an original method for bearing fault detection in high speed synchronous machines is presented. This method is based on the statistical process of Welch's periodogram of the stator currents in order to obtain stable and normalized fault indicators. The principle of the method is to statistically compare the current spectrum to a healthy reference so as to quantify the changes ove...

We propose a novel solid-state disk (SSD) architecture that utilizes a double-data-rate synchronous NAND flash interface for improving read and write performance. Unlike the conventional design, the data transfer rate in the proposed design is doubled in harmony with synchronous signaling. The new architecture does not require any extra pins with respect to the conventional architecture, thereb...

This paper addresses self-sensing (“sensorless”) control of salient-pole permanent magnet synchronous motors (PMSM’s). The major contribution of this work is the introduction of a simple-to-implement estimation technique that operates over a wide speed range, including zero speed. The technique achieves simplicity by decoupling the inherent cross-coupling in PMSM’s. The technique utilizes the d...

Recently, syntactic information has helped significantly to improve statistical machine translation. However, the use of syntactic information may have a negative impact on the speed of translation because of the large number of rules, especially when syntax labels are projected from a parser in syntax-augmented machine translation. In this paper, we propose a syntax-label clustering method tha...

In this study, design, implementation, and power performance analyses of a micro wind turbine (MWT) system are presented. An original permanent magnet synchronous generator (PMSG) that reduced cogging torque was employed as a generator in the MWT. A novel blade form offering better performance at low wind speeds was also utilized for the MWT blades. Power performance analyses of the MWT were ca...

In collaborative multi-agent systems, the participating agents have to join forces in order to solve a common goal. The necessary coordination is often realized by message exchange. While this might work perfectly in simulated environments, the implementation of such systems in a field application usually reveals some challenging properties: arbitrary communication networks, message delays due ...