基于物理模型法的目标地震动信号建模与仿真

The Modeling and Simulation of Target Seismic Signals Based on Physical Model Method

在战场地面目标探测的研究中,由于地形地势复杂多变,为了获得典型目标(人员、车辆)在各种地形地质条件及各种运动状态下充分的样本信号,提出了一种基于弹簧阻尼等效物理模型的建模方法。该方法通过对目标与地面作用过程及地震动信号传播机理的分析,运用物理模型推导得出目标激励函数;并主要以弹性波动方程中赫姆霍兹解法为基础,最终建立了信号传播介质微粒的速度模型。而后在MATLAB环境下,利用该模型仿真得到不同条件下的目标地震动预测信号。仿真结果表明,预测信号与实测信号符合很好,目标信号模型构建正确。该模型将对目标地震动信号库的建立具有重要意义。

In the study of ground targets detection, in order to obtain each type of typical target （person,vehi- cles） sample signals in the various topography conditions and motion states, a modeling method based on spring damping equivalent physical model was proposed due to the complexity of the battlefield. In the method, the inter- action process of the target and ground and signal propagation mechanism was analyzed, the target stimulated func- tion was derived by the model. The targets signal medium particle velocity model was established based on Helm- holtz equation solution. And then in the MATLAB environment, target seismic predicted signals under the different conditions were simulated by using the model. Results show that the predicted signal was similar to the measured signal proved that the model was correct, the model will play an important role in the establishment of the target seismic signal library.