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With increased demand in electric drives applications for higher power density, higher efficiency and higher temperature operation, integrated motor drives are gaining greater interest in automotive, aerospace and other specialist applications. Integrated drives not only physically integrate the various components of the drive (power electronic devices, filter components etc.) they must also integrate...
This paper presents a high speed electric machine with integrated magnetics of the grid side LCL filter. The integrated drive has been designed to take full advantage of sharing the machine stator structure for volume reduction. The main outcome of this paper is the ability to integrate all six LCL filter inductors into the proposed machine by sharing the original machine's magnetic circuit without...
A novel projection framework is presented for constructing stable reduced macromodels for stable active linear circuits. Stability preservation is a necessary property for time-domain simulation. The proposed method is based on an efficient algorithm for computing the projection matrices. The validity of the proposed method is demonstrated using numerical example.
In recent years, indoor localization is getting more and more attention. The uncertainty of data commonly exists due to the inaccuracy of measurement instrument and the irregularity (multipath, diffraction and obstacle) of wireless signal transmission model in indoor environment. This uncertainty will affect positioning precision. In order to solve such issue, a distributed localization algorithm...
This paper presents a direct torque control (DTC) method on a six-phase SRM driven by a six-phase asymmetric half bridge converter. Modeling and simulations of the proposed drive system have been built with MATLAB/SIMULINK. In the proposed DTC method, instantaneous output torque of the six-phase SRM is directly controlled by flux-linkage magnitude and rotating speed regulation (acceleration or deceleration)...
A novel projection framework is presented for constructing stable reduced macromodels for stable active linear circuits. Stability preservation is a necessary property for time-domain simulation. The proposed method is based on an efficient algorithm for computing the projection matrices. The validity of the proposed method is demonstrated using numerical example.
This paper presents a novel converter topology for 6- phase Switched Reluctance Motor (SRM) drives, which needs no additional energy storage elements with reduced number of components. Compared with an asymmetric half bridge converter, the novel converter reduces the number of switches, diodes, and connections between motor and converter to half. A dynamic model of a 12/10 SRM is developed in Matlab/Simulink...
The voice quality of videoconferencing system is seriously affected by acoustic echoes. AEC (acoustic echo cancellation) itself is delicate and complex. It becomes more difficult to cancel acoustic echoes with pure software in an Internet multi-party videoconferencing scenario because of the varying operating system time-delay, complex echo path and network delay jitters. We propose a novel effective...
Full coverage testing is commonly perceived as a mission impossible because software is more complex than ever and produces vast space to cover. This paper introduces a novel approach which uses ACSL formal specifications to define and reach test coverage, especially in the sense of data coverage. Based on this approach, we create a tool chain named FAST which can automatically generate test harness...
Due to the features of interaction between malicious codes, the cooperation becomes more and more common. In this paper, cooperation between worm and virus is discussed in detail, and a cooperation model named CM model is proposed to describe the dynamical process of propagation. Results of simulation and mathematic analysis show that the propagation performance is significantly improved with the...
We proposed a worm detection and defense system named bot-honeynet in this paper, which combines the best features of honeynet, anomaly detection and botnet. The combination of honeynet and anomaly detection system offers a tradeoff between false positive and false negative rates. The control mechanism of botnet can help our system control all the honeypots in the bot-honeynet. Bot-honeynet is designed...
The strongly scattering and high gain in the active medium are necessary to produce the random laser. The random laser has been one of the focused research area in the laser scopes because of the random direction of the laser emission, small bulk, having no outside resonator, and potential applications in many fields. The PVK:Alq3:DCM organic films with TiO2 scattering particles were manufactured...
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