船舶线束寄生参数和串扰动态变化估计

Estimation for the variation of parasitic parameters and crosstalk of cable bundles in ship

为了预测船舶航行时其内部线束寄生参数和串扰的动态变化,建立最好、最差情况模型。根据船舶航行时,导线在线束内随机运动的极限位置,得到寄生参数和串扰耦合的最好、最差情况值,寄生参数和串扰在最好、最差情况之间动态变化。与仿真结果比较,所选位置的寄生参数值都在最好、最差情况之间;低于5 MHz,串扰也在最好、最差情况区间内;高于5 MHz,一些位置点串扰值低于最好情况值,可能与二次效应有关。建立的模型简单、实用,能够快速估计寄生参数和串扰的动态变化。

In order to predict the variation of parasitic parameters and crosstalk in the cable bundles as the surface vessel navigated, the model of the best and worst cases was established. The minimum and maximum val- ues of the parasitic parameters and erosstalk were gained through the extreme positions of wires in cable bundle as the surface vessel navigated. The values of the parasitic parameters and crosstalk varied between the best and the worst case. By comparison with the results from the simulation, the values of the parasitic parameters in all select- ed positions are in the best and worse case interval when the frequencies are lower than 5 MHz. Moreover, the val- ue of crosstalk in some positions are lower than the best case value as the second-order effect in all probability when the frequencies are higher than 5 MHz. It concludes that the model is simple and practical, which can estimate the variation of the parasitic parameters and crosstalk rapidly.