船载HFSWR海杂波截面积方程研究与仿真

发布时间：2018-04-15 21:25

本文选题：高频地波雷达 + 海杂波　；参考：《哈尔滨工业大学》2015年硕士论文

【摘要】：高频地波雷达HFSWR(High Frequency Surface Wave Radar)主要分为岸基HFSWR和船载HFSWR两种。相对于岸基HFSWR来说,船载HFSWR除具有全天候和低成本的特性之外,还具有灵活机动不易受到攻击,大幅增加作战空间,充分发挥船载武器的作战能力等优势。本文主要从两个方面对船载平台HFSWR海杂波进行研究。一方面是从频域上通过对海杂波雷达截面积方程的推导,对船载平台的海杂波频谱进行仿真分析;另一方面是从时域上通过研究平台运动对海杂波散射回波的影响,对船载平台的海杂波频谱分布及空时分布进行仿真分析。首先本文基于Barrick提出的岸基HFSWR一阶和二阶海杂波的模型,推导了岸基HFSWR一阶和二阶海杂波的雷达截面积RCS(Radar Cross Section)方程,并对该平台下一阶和二阶海杂波进行了仿真和分析。然后参照Walsh和Gill的双基地模型,推导了漂浮平台HFSWR一阶和二阶海杂波的RCS,并对该平台下的一阶海杂波进行了仿真和分析。此外,还将漂浮平台退化为岸基平台得到的一阶海杂波频谱,与基于Barrick模型得到的一阶海杂波频谱进行对比,验证了两个模型的一致性。其次,本文基于对单基地垂直极化电偶极子后向散射场的建模,对匀速直线运动平台的HFSWR一阶海杂波雷达截面积方程进行推导,并对该平台下一阶海杂波进行仿真分析。然后将漂浮平台和匀速运动平台的模型相结合,推导存在摇摆运动(在船舷方向进行左右周期性震动)的前向运动平台HFSWR一阶海杂波RCS,并对该平台下一阶海杂波进行仿真。最后,本文对具有六自由度运动的实际船载平台的运动进行了分析和建模。然后采用均匀线性阵列作为接收阵列,重点讨论了三个自由度上的平动振动对一阶海杂波散射回波的影响。给出纵荡平台和横荡平台的一阶海杂波散射回波表达式,并对具有前向速度的横荡平台和纵荡平台的一阶海杂波频谱和空时分布进行了仿真分析,给出三维平动船载平台一阶海杂波的分布规律。
[Abstract]:High frequency ground wave radar (HFSWR(High Frequency Surface Wave Radar) is mainly divided into two types: shore-based HFSWR and ship-borne HFSWR.Compared with shore-based HFSWR, shipborne HFSWR not only has the characteristics of all-weather and low cost, but also has the advantages of flexible maneuvering and not easy to be attacked, greatly increasing the combat space and giving full play to the combat capability of shipborne weapons.In this paper, HFSWR sea clutter of shipborne platform is studied from two aspects.On the one hand, by deducing the cross-sectional area equation of sea clutter radar in frequency domain, the sea clutter spectrum of shipborne platform is simulated and analyzed; on the other hand, the influence of platform motion on sea clutter scattering echo is studied in time domain.The sea clutter spectrum distribution and space-time distribution of ship-borne platform are simulated and analyzed.Firstly, based on the first and second order sea clutter models proposed by Barrick, the first and second order RCS(Radar Cross secure equations of shore-based HFSWR first and second order sea clutter are derived, and the first and second order sea clutter are simulated and analyzed.According to the bistatic model of Walsh and Gill, the first and second order sea clutter of floating platform is deduced, and the first order sea clutter is simulated and analyzed.In addition, the floating platform is reduced to the first-order sea clutter spectrum obtained from the shore-based platform, and compared with the first-order sea clutter spectrum based on the Barrick model, which verifies the consistency of the two models.Secondly, based on the modeling of the backward scattering field of the single static vertical polarization electric dipole, the HFSWR first-order sea clutter radar cross-sectional area equation of the uniform velocity linear moving platform is derived, and the simulation analysis of the first order sea clutter under the platform is carried out.Then the model of floating platform and uniform moving platform is combined to deduce the first order sea clutter of forward motion platform with rocking motion (left and right periodic vibration in the direction of the ship's side) and the simulation of the next order sea clutter in this platform.Finally, the motion of a ship-borne platform with six degrees of freedom is analyzed and modeled.Then the uniform linear array is used as the receiving array, and the effect of the translational vibration on the scattering echo of the first order sea clutter is discussed.The first order sea clutter scattering echo expressions of the longitudinal and transverse platforms are given, and the spectrum and space-time distribution of the first order sea clutter of the swinging platform and the longitudinal swinging platform with forward velocity are simulated and analyzed.The distribution of the first order sea clutter on a three-dimensional translational ship-borne platform is given.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U674.703.3

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