基于虚拟仪器技术的船舶电场仿真与信号生成研究

Research on ship electric field simulation and signal generation based on virtual instrument technology

水下电场半实物模拟是研究船舶水下电场特性、验证水下电场感知装置性能和特征检测算法效果的重要手段。本文围绕电场半实物模拟需求,将电场数学模型与虚拟仪器技术相结合,基于LabVIEW平台开发了一套船舶电场模拟装置,可将船舶数学模型仿真信号转化为可被物理感知的电压信号。将船舶电场等效为水平电偶极子模型,基于LabVIEW语言开发测控软件界面,底层调用偶极子电场模型动态链接库文件实现电场信号的数值计算,利用数值信号驱动24位D/A卡产生模拟电压信号,实现船舶电场信号的物理生成。经实验验证,船舶电场模拟装置可实现典型海洋环境下运动船舶电场信号的物理输出,输出信号曲线与模型计算曲线吻合,可为船舶电场测试以及相关算法验证等提供信号输入。

Semi-physical simulation of underwater electric field is an important means to study the characteristics of ship's underwater electric field,verify the performance of underwater electric field sensing device and the effect of feature detection algorithm.This paper focuses on the demand for semi-physical simulation of electric field,combines the electric field mathematical model with virtual instrument technology,and develops a set of ship's electric field simulation device based on LabVIEW platform,which can convert the simulation signal of the ship's mathematical model into a physically perceivable voltage signal.The ship's electric field is equivalent to the horizontal electric dipole model,based on LabVIEW language development measurement and control software interface,the bottom call dipole electric field model dynamic link library file to achieve the numerical computation of the electric field signal,the use of numerical signals to drive the 24-bit D/A card to produce analog voltage signals,to achieve the physical generation of the ship's electric field signal.After experimental verification,the ship electric field simulation device can realize the physical output of the ship electric field signal under typical marine environment,and the output signal curve matches with the calculated curve of the model,which can provide signal input for the ship electric field test and related algorithm verification.