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Hybrid Electric Vehicles (HEVs) require the power to drive the vehicle via a combination of internal combustion engine (ICE) and electric motors. To improve the drivability, the smooth torque change during the driving mode switching is essential. This task can be achieved by using the coordinated control strategy. This paper presents a coordinated control strategy which can effectively suppress the...
Analysis of human behaviors is important in several research fields such as service science. In this paper, a method of model-based analysis of human behaviors is studied. First, a switched linear regression model is introduced. Using this model, we can obtain changing points of behaviors and trends of behaviors between changing points. Furthermore, the analysis method using this model is explained...
Ihis paper evaluates the pertormance ot dynamic element matching (DEM) in digital-to-analog-converters, when the unit conversion cells of the converter have finite output resistance. DEM is already known to be effective against the static amplitude, timing and pulse shaped mismatches. However, the effect of output resistance and its mismatches has not been studied. A comprehensive code-dependent output...
In this paper two multiphysics models are performed in order to predict vibration behavior in a five-phase flux switching machine. Radial magnetic stress is calculated using both analytical model obtained by permeance network and finite element model. In order to evaluate stator radial accelerations, each of the two magnetic models are coupled with an analytical mechanical model to diagnose faulty...
This paper presents an improved analytical model for estimating the high-frequency current ripple of interior permanent magnet (IPM) synchronous machines due to PWM switching. The proposed model accounts for the impact of slotting effects, magnetic saturation, and cross-coupling between the d- and q-axes. The model is subsequently used to investigate several factors that influence the PWM-induced...
This paper presents a static non-linearity correction technique exemplary applied on a 10-bit source series terminated digital-to-analog converter (DAC) implemented in 180 nm CMOS. The proposed technique proves for the first time, that an undesired power supply and package resistance can be turned into a benefit by canceling non-linearity effects introduced by the MOSFET switches within the source...
Software Defined Networking (SDN) emphasizes the separation of data and control plane while network function virtualization (NFV) decouples network function from underlying hardware. Combining SDN with NFV would have many benefits, but the problem is how to integrate them. There are two possible architectures for such integration: the controller interacts with virtualized network functions (VNFs)...
The maximum power available from a photovoltaic (PV) generator in many grid connected systems is extracted using a dc-dc step up converter that implements a maximum power point tracking (MPPT) algorithm. Traditional MPPT algorithms are iterative, continuously searching for the maximum power point (MPP) under varying weather conditions. Due to the nonlinear time-varying nature of commonly used MPPT...
Failure analysis is an important part in reliability analysis, while the traditional FMEA method could not analyze system with complex physical structure and functional logic by tables. Based on the Altarica language, this paper presents a method of product fault modeling and analysis for complex system. Then give examples of cold/warm backup system and reconfiguration system to verify the accuracy...
In this paper, we propose a bounded-confidence opinion model and focus on the study of the opinion consensus probability based on long-range opinion interactions. In this model, each agent updates its opinion using some agents' opinion values according to its confidence bound. We provide a lower bound of the opinion consensus probability when the confidence bound is sufficiently small. Also, we give...
In an SDN/NFV-enabled network, the behavior of virtual switches is a major concern in determining the overall network performance. The prominent open-source solution for virtual switching is Open vSwitch while the DPDK library has been developed to accelerate the packet processing. In this paper, we develop a general framework for the modeling and the analysis of DPDK-based virtual switches, taking...
When it comes to the computation / estimation of the switching losses in a multilevel converter, it is crucial to know the instantaneous value of the output current. If the average output current value is used instead, there is a non negligible error when the quality of the output current waveform is low. This paper addresses this issue with a generic and versatile fast numerical method for phase-disposition...
OpenFlow has been applied to a variety of demands of the transmission quality of the Internet business and it is still growing on its way. To test this protocol with its evolution consideration, we analyzed the working process of OpenFlow protocol and constructed the CPN model through phasing firstly and then role division for version 1.0. In addition, the selection of tokens and their given values...
Packet collision and packet delay are considered to be critical for safety applications in vehicular networks. This paper designs a new analytical model to evaluate the performance of channel switching for IEEE 802.11p/WAVE in vehicular networks. Under this model, it explicitly expresses the WAVE channel switching, and constructs contention window size and number of vehicles as packet collision probability...
In this paper, a comparative analysis on three types of switched capacitor DC-DC converter, which are SCVM (Switched capacitor Voltage Multiplier) type, series-parallel type and Fibonacci type, is performed in same modeling way. The way is four terminal equivalent circuit model. In this model, it is possible to derive power efficiency and relation between input and output. In order to do the analysis,...
Modular Multilevel Converter (MMC) is one of the most promising topology in medium- and high voltage high power application such as high-voltage dc (HVDC) transmission systems and medium voltage drives (MVD). In high power application, the semiconductor loss modelling is essential for system efficiency evaluation, thermal system design. Power loss information is also indispensable in device thermal...
To improve battery cell balancing speed, a novel switched capacitor (SC) circuit combining the conventional SC circuit and the optimized SC circuit is proposed in this paper. It has the advantage that the balancing speed is independent of number increase as well as initial voltage variation of battery cells. The equivalent model of the proposed circuit is developed and analyzed in this paper. Compared...
This paper introduces a model for dynamical reliability parameters assessment based on Bayesian methodology, which can be applied, with a good approximation, either for serial, parallel or mixt subsystems configurations. The failure data for component, subcomponent or elements are included in posterior distributions, enabling the extrapolation of failure parameters to similar entities in related systems...
In this study, the feedback controllers were designed and implemented to fulfill the constant-voltage (CV) and constant-current (CC) output modes for a power converter. This converter's power stage was composed of a stand-by power, power factor corrector, and DC-DC converter. The topology used by the DC-DC converter was a phase-shifted full-bridge with a parallel current-doubler rectification converter...
The harmonic performance of the slim dc-link adjustable speed drives has shown good performance in some studies but poor in some others. The contradiction indicates that a feasible theoretical analysis is still lacking to characterize the harmonic distortion for the slim dc-link drive. Considering the shortcomings of the present harmonic analysis methods, such as the time-domain simulation, or the...
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