The Audio and Video Bridging (AVB) technology equips Ethernet with Real-Time characteristics, based on standards developed by IEEE 802.1. In 2011, the IEEE 802,1 AVB Task group completed the first generation of AVB St...
ISBN:
(纸本)9781467347358
The Audio and Video Bridging (AVB) technology equips Ethernet with Real-Time characteristics, based on standards developed by IEEE 802.1. In 2011, the IEEE 802,1 AVB Task group completed the first generation of AVB Standards, and is currently starting standardization work on AVB Generation 2, aimed at Industrial Automation & control networks, as well as Automotive networks. One aspect of this standardization effort is to adapt AVB stream reservation mechanisms to operate with industrial-standard fault tolerance technologies. This paper proposes a method to allow AVB to be used flexibly with different use-cases and different stream configuration mechanisms to achieve fault-tolerance. The method has been verified through simulation and has been proposed to the AVB task group for inclusion into the 2nd Generation AVB standards.
Recently, microrobots have been the subject of a large number of studies, and contests are held throughout the year with the aim of developing microrobot technologies. As a result, various types of microrobots have be...
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Compared with the conventional vehicles, electric vehicles (EV) has many advantages, such as absence of emissions, high efficiency, and independence from petroleum. In this paper, a Brushless DC motor (BLDCM) is used ...
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The use of high power multi-level converters as an interface for renewable energy sources allows modern power grids to achieve a higher flexibility and reliability. Cascaded H-Bridge Converters (CHB) are particularly ...
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ISBN:
(纸本)9781622761456
The use of high power multi-level converters as an interface for renewable energy sources allows modern power grids to achieve a higher flexibility and reliability. Cascaded H-Bridge Converters (CHB) are particularly suitable in these applications but more advanced control techniques are required. In particular Dead-Beat current control methods are a promising solution for high-power CHB. However in high-power applications, a reduced switching frequency is required to ensure high efficiency operation and the performance of the control, in term of quality of the AC side current, may be reduced. As a result a more accurate approximation of the derivative, used in the discretised control law, may be required to ensure accurate operation. In this paper three different methods for the discretisation of the converter model are analysed and compared. The most suitable one is then chosen to implement an improved Dead-Beat current control for AC current regulation of a 7-level, CHB active rectifier.
The paper indicates a self-developed testing system of reaction time based on the theory of mesopic vision. The system is supposed to simulate the actual effects of tunnel lighting with varies of light sources, which ...
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In this paper, a fast algorithm is proposed to speed up the motion and disparity estimation in stereoscopic video coding. Based on the stereo-motion consistency constraint, an iterative search strategy is suggested to...
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In order to detect traffic sign effectively and quickly, firstly, this paper firstly discriminates the maximum and minimum values of the color-components R, G and B, and then ignores pixels having little color similar...
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ISBN:
(纸本)9780769542966
In order to detect traffic sign effectively and quickly, firstly, this paper firstly discriminates the maximum and minimum values of the color-components R, G and B, and then ignores pixels having little color similarity with traffic sign. Secondly, it regards the points of RGB space as color eigenvector and calculates the cosine value of included angle of vectors to discriminate color similarity. Thirdly, the image is divided into core image, undetermined area and background area by setting two thresholds, and then two corresponding templates and modes are used to scan the image, realizing growth of core image by area mergence. Finally, the operator Roberts is applied to detect fringe of the traffic sign. The experimental result shows that the method has better result of detection both in sunny and in rainy day. The process of detecting avoids huge amount of calculation for color space conversion, and improves the speed of calculation, which will lay the foundation for recognition of traffic sign.
This paper presents a novel dedicated PWM technique for use with single-phase (or four wire three-phase) multi-level Cascaded H-Bridge Converters. The proposed modulation strategy aims to minimize the unbalance of the...
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ISBN:
(纸本)9781467308021
This paper presents a novel dedicated PWM technique for use with single-phase (or four wire three-phase) multi-level Cascaded H-Bridge Converters. The proposed modulation strategy aims to minimize the unbalance of the DC-Link voltages, for any amplitude of the voltage reference, amongst the different converter cells in order to obtain highquality waveforms with a low switching frequency. Moreover the device voltage drops and ON resistance, which in highpower multilevel converter have a significant impact on the quality of the produced voltage, are compensated. The technique is described in detail along with the concept of a modular converter prototype for smart grid applications and an outline of its construction. Verification of the modulation effectiveness is provided with simulation and experimental results for a 3kW seven level Cascaded Converter.
The vehicle sideslip angle is one of the most important variables to evaluate vehicle stability during dynamic maneuvers. The vehicle dynamic represented by the single track vehicle model with linear tire is firstly i...
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An OTA-C filter implementation suited to low-voltage operation is presented. An operational transconductance amplifier (OTA) based on a bulk-driven input stage with enhanced DC gain and bandwidth was designed and incl...
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