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Gouging is a damage mechanism that occurs on the surface of rails of electromagnetic railgun. The disadvantages of gouging include lowering efficiency of railgun system, decreasing life of rails and reducing direction accuracy of projectile. According to configuration and dimension of the experimental arrangement, analysis of rail vibration induced by hypervelocity sliding load and numerical solve...
Large caliber sniper must satisfy several design requirements such as firing accuracy, reliability, weight limit and so on. How to get optimized structure parameters of large caliber sniper is a key target of designers. Global parameters optimization of large caliber sniper rifle based on genetic algorithm was studied in this paper. Firing accuracy was chosen as object function of global parameters...
We propose a frequency-domain modeling technique with applications on the statistical timing analysis of clock mesh/grid networks. Using transmission lines to model clock mesh edges, we express the means and (co)variances of the sink arrival times as polynomial functions of the arrival times of the input signals and the wire widths of the mesh edges, with up to second order accuracy. Experimental...
To solve the problem of hydraulic bumper of a type of large-caliber sniper rifle that its flow gap area can not be adjusted, this article improved its structure with the help of computer. The flow area of hydraulic bumper was redesigned to be a groove which has variable depth. The outline of the groove was created by cubic spline. A set of optimized parameters were got by using the optimization toolbox...
We propose a novel traveling-wave oscillator (R2TWO) that uses reflection and regeneration of waves on a transmission line to generate multi-GHz square wave signals. We also propose a scalable, low-power, low-skew and low-jitter clock distribution network by tiling the basic R2TWO s in a regular fashion. Measurement results of a TSMC 0.18mum CMOS test chip show that it can generate and distribute...
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