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Unmanned Underwater Vehicle (UUV) is being widely developed and used in many areas. In order to meet the low resistance and low noise requirements of a kind of UUV for long voyage, the outline curve and parameters of different sections of the UUV are figured out by using method of superposition of point-source and uniform-flow, superposition of constant-strength-line-congruence and uniform-flow, and...
Based on the adaptive fuzzy control theory, a self-regulating fuzzy controller is designed for a small cylindrical object navigating near free-surface to minimize wave disturbance and to keep the object move in the desired depth. First, the near free-surface dynamics model of the cylindrical object is presented with the first and second order wave forces. Second, math simulation is introduced to testify...
The short circuit collapse problem of electric power system attacked by graphite bombs was investigated. The harm of graphite bombs and the vulnerability of electrical network were analyzed. Two kinds of failure modes called direct short circuit failure and indirect short circuit failure were presented accordingly. The arc generation mechanism of conductive filaments dispensed from graphite bombs...
Analysis and experimental research on the phenomenon and mechanism of arc generation between two phases of power system were carried out. Four physical effects which resulted in the generation of electric arc were described. The clearing characteristics of general conductive filaments were analyzed. The efficient filaments clearing methods were explored. The research results are helpful for the power...
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