發(fā)布時(shí)間：2018-04-15 21:25

  本文選題：高頻地波雷達(dá) + 海雜波��； 參考：《哈爾濱工業(yè)大學(xué)》2015年碩士論文

【摘要】：高頻地波雷達(dá)HFSWR(High Frequency Surface Wave Radar)主要分為岸基HFSWR和船載HFSWR兩種。相對于岸基HFSWR來說,船載HFSWR除具有全天候和低成本的特性之外,還具有靈活機(jī)動(dòng)不易受到攻擊,大幅增加作戰(zhàn)空間,充分發(fā)揮船載武器的作戰(zhàn)能力等優(yōu)勢。本文主要從兩個(gè)方面對船載平臺HFSWR海雜波進(jìn)行研究。一方面是從頻域上通過對海雜波雷達(dá)截面積方程的推導(dǎo),對船載平臺的海雜波頻譜進(jìn)行仿真分析;另一方面是從時(shí)域上通過研究平臺運(yùn)動(dòng)對海雜波散射回波的影響,對船載平臺的海雜波頻譜分布及空時(shí)分布進(jìn)行仿真分析。首先本文基于Barrick提出的岸基HFSWR一階和二階海雜波的模型,推導(dǎo)了岸基HFSWR一階和二階海雜波的雷達(dá)截面積RCS(Radar Cross Section)方程,并對該平臺下一階和二階海雜波進(jìn)行了仿真和分析。然后參照Walsh和Gill的雙基地模型,推導(dǎo)了漂浮平臺HFSWR一階和二階海雜波的RCS,并對該平臺下的一階海雜波進(jìn)行了仿真和分析。此外,還將漂浮平臺退化為岸基平臺得到的一階海雜波頻譜,與基于Barrick模型得到的一階海雜波頻譜進(jìn)行對比,驗(yàn)證了兩個(gè)模型的一致性。其次,本文基于對單基地垂直極化電偶極子后向散射場的建模,對勻速直線運(yùn)動(dòng)平臺的HFSWR一階海雜波雷達(dá)截面積方程進(jìn)行推導(dǎo),并對該平臺下一階海雜波進(jìn)行仿真分析。然后將漂浮平臺和勻速運(yùn)動(dòng)平臺的模型相結(jié)合,推導(dǎo)存在搖擺運(yùn)動(dòng)(在船舷方向進(jìn)行左右周期性震動(dòng))的前向運(yùn)動(dòng)平臺HFSWR一階海雜波RCS,并對該平臺下一階海雜波進(jìn)行仿真。最后,本文對具有六自由度運(yùn)動(dòng)的實(shí)際船載平臺的運(yùn)動(dòng)進(jìn)行了分析和建模。然后采用均勻線性陣列作為接收陣列,重點(diǎn)討論了三個(gè)自由度上的平動(dòng)振動(dòng)對一階海雜波散射回波的影響。給出縱蕩平臺和橫蕩平臺的一階海雜波散射回波表達(dá)式,并對具有前向速度的橫蕩平臺和縱蕩平臺的一階海雜波頻譜和空時(shí)分布進(jìn)行了仿真分析,給出三維平動(dòng)船載平臺一階海雜波的分布規(guī)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.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U674.703.3

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本文編號：1755847