Global Synchronization of Directed Networks with Fast Switching Topologies

2009 ◽  
Vol 52 (6) ◽  
pp. 1019-1924 ◽  
Author(s):  
Lu Xin-Biao ◽  
Qin Bu-Zhi ◽  
Lu Xin-Yu
Keyword(s):  
Directed Networks ◽  
Global Synchronization ◽  
Fast Switching ◽  
Switching Topologies

scholarly journals Robust Leaderless Consensus of Uncertain Multiagent Systems with Fast Switching Topologies

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Wei Liu ◽  
Shaolei Zhou ◽  
Shi Yan ◽  
Gaoyang Yin
Keyword(s):  
Multiagent Systems ◽  
Special Property ◽  
Laplacian Matrix ◽  
Graph Laplacian ◽  
Consensus Problem ◽  
Time Intervals ◽  
Fast Switching ◽  
Switching Topologies ◽  
Directed Spanning Tree ◽  
Theoretical Results

This paper investigates the robust leaderless consensus problem of uncertain multiagent systems with directed fast switching topologies. The topologies are assumed to jointly contain a directed spanning tree. Based on a special property of the graph Laplacian matrix, the consensus problem is converted into a stabilization problem by performing a proper variable transformation. Averaging method is employed for analysis. It is proved that if the topologies switch sufficiently fast and the controllers are properly designed, the robust leaderless consensus can still be achieved even when all the possible topologies are unconnected in the switching time intervals. Finally, a numerical simulation is provided to illustrate the effectiveness of the theoretical results.

Quantized consensus over directed networks with switching topologies

2014 ◽  
Vol 65 ◽  
pp. 13-22 ◽  
Author(s):  
Dequan Li ◽  
Qiupeng Liu ◽  
Xiaofan Wang ◽  
Zhixiang Yin
Keyword(s):  
Directed Networks ◽  
Switching Topologies ◽  
Quantized Consensus

WHEN SYMMETRIZATION GUARANTEES SYNCHRONIZATION IN DIRECTED NETWORKS

2007 ◽  
Vol 17 (10) ◽  
pp. 3387-3395 ◽  
Author(s):  
IGOR BELYKH ◽  
MARTIN HASLER ◽  
VLADIMIR BELYKH
Keyword(s):  
Global Stability ◽  
Coupling Strength ◽  
Directed Network ◽  
Coupling Coefficients ◽  
Directed Networks ◽  
Global Synchronization ◽  
Unidirectional Coupling ◽  
Oscillator Networks ◽  
Globally Stable ◽  
Balanced Networks

We review and illustrate our recent results on globally stable synchronization in directed oscillator networks. We consider asymmetrically connected networks with node balance, the property that the sum of the coupling coefficients of all edges directed to a node equals the sum of the coupling coefficients of all the edges directed outward from the node. We show that for such directed but node balanced networks, it is sufficient to symmetrize all connections by replacing a unidirectional coupling with a bidirectional coupling of half the coupling strength. The synchronization condition for the symmetrized network then guarantees synchronization in the original directed network. By considering an example of coupled driven pendula, we show how to prove global stability of synchronization in a concrete unidirectional network. We also discuss the relation between local and global synchronization.

Iron Loss Characteristics of Motors Fed by Fast Switching GaN-FET Inverters

2020 ◽  
Vol 140 (6) ◽  
pp. 488-494
Author(s):  
Haruo Naitoh ◽  
Takaya Sugimoto ◽  
Keisuke Fujisaki
Keyword(s):  
Iron Loss ◽  
Fast Switching ◽  
Gan Fet

Methodology for Analysis of Schottky Diode Failures

2010 ◽  
Author(s):  
Bhanu P. Sood ◽  
Michael Pecht ◽  
John Miker ◽  
Tom Wanek
Keyword(s):  
Failure Mode ◽  
Schottky Diode ◽  
Failure Modes ◽  
Schottky Diodes ◽  
Failure Mechanisms ◽  
Forward Voltage ◽  
Fast Switching ◽  
Voltage Drops ◽  
The Common

Abstract Schottky diodes are semiconductor switching devices with low forward voltage drops and very fast switching speeds. This paper provides an overview of the common failure modes in Schottky diodes and corresponding failure mechanisms associated with each failure mode. Results of material level evaluation on diodes and packages as well as manufacturing and assembly processes are analyzed to identify a set of possible failure sites with associated failure modes, mechanisms, and causes. A case study is then presented to illustrate the application of a systematic FMMEA methodology to the analysis of a specific failure in a Schottky diode package.

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