本文選題：海面　切入點(diǎn)：電磁散射　出處：《哈爾濱工程大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：關(guān)于海面雷達(dá)探測的研究始終是一個(gè)重要的課題,當(dāng)機(jī)載或艦載雷達(dá)在海面背景下對(duì)軍事目標(biāo)進(jìn)行探測時(shí),電磁回波信號(hào)中包含了正�；夭ㄒ约霸诒尘扒闆r下的電磁散射信號(hào),深入對(duì)復(fù)雜環(huán)境和目標(biāo)電磁散射回波相關(guān)問題的研究是目前國防科研中的重要方向,也為雷達(dá)精確探測、制導(dǎo)、海面微波遙感、海面不規(guī)則目標(biāo)探測與遙感提供理論基礎(chǔ)和可靠的分析方法,所以研究影響復(fù)雜環(huán)境與目標(biāo)的電磁散射回波的相關(guān)問題已經(jīng)成為國防科技的重要研究技術(shù)之一。本文著重分析海面環(huán)境下艦船目標(biāo)電磁散射的相關(guān)問題,結(jié)合某艦?zāi)Ｐ团c標(biāo)準(zhǔn)粗糙海面,建立適合分析海面與目標(biāo)電磁散射的模型,在蒸發(fā)波導(dǎo)、不同海情及兩種情況共同制約時(shí)的幾種環(huán)境下,剖析影響目標(biāo)雷達(dá)回波的作用機(jī)理。主要研究的內(nèi)容包括:1、分別在不同雷達(dá)入射角域內(nèi),探討和分析了海面后向散射系數(shù)與雷達(dá)參數(shù)及海面狀態(tài)的影響關(guān)系。2、在蒸發(fā)波導(dǎo)環(huán)境下,對(duì)目標(biāo)雷達(dá)回波進(jìn)行仿真研究,討論了輻射源高度與波導(dǎo)高度的相對(duì)位置及蒸發(fā)波導(dǎo)的特征量對(duì)目標(biāo)雷達(dá)回波的影響。3、在不同海情狀態(tài)下,對(duì)目標(biāo)雷達(dá)回波進(jìn)行仿真分析,從各個(gè)角域范圍分別討論了目標(biāo)雷達(dá)回波隨海情的變化情況,分析影響目標(biāo)雷達(dá)回波的作用機(jī)理。4、考慮蒸發(fā)波導(dǎo)和不同海情共同制約的環(huán)境下目標(biāo)雷達(dá)回波情況,對(duì)粗糙海面蒸發(fā)波導(dǎo)傳播進(jìn)行了深層次的研究。本文采用理論分析和仿真實(shí)驗(yàn)相結(jié)合的方式,通過仿真分析可知,海面后向散射系數(shù)和雷達(dá)參數(shù)及海面狀態(tài)密切相關(guān),且變化情況隨之有一定規(guī)律;海面蒸發(fā)波導(dǎo)增強(qiáng)了雷達(dá)對(duì)海面附近目標(biāo)的探測能力,隨著波導(dǎo)高度增加探測能力增強(qiáng),且大氣濕度對(duì)蒸發(fā)波導(dǎo)傳播有一定影響;目標(biāo)雷達(dá)回波在各個(gè)角域范圍隨海情的變化規(guī)律呈一定趨勢,深入對(duì)其作用機(jī)理進(jìn)行了理論分析和總結(jié);通過目標(biāo)雷達(dá)回波分析可知,海面粗糙度對(duì)蒸發(fā)波導(dǎo)傳播有一定影響,海面越粗糙,則有更多的陷獲能量被散射掉�？傊�,由于海面自身的條件及隨機(jī)多變的特性,目標(biāo)雷達(dá)散射回波會(huì)受到不同程度的影響,且通過理論分析驗(yàn)證了仿真結(jié)果的可靠性,為海面雷達(dá)偵測提供了參考依據(jù)。
[Abstract]:The research on sea surface radar detection is always an important subject. When airborne or shipborne radar detects military targets in the sea background, the electromagnetic echo signal contains the normal echo and the electromagnetic scattering signal in the background. Deep research on the problems related to the electromagnetic scattering echoes of complex environments and targets is an important direction in the field of national defense research at present. It is also for radar precise detection, guidance, and microwave remote sensing of the sea surface. The detection and remote sensing of irregular targets on the sea provide a theoretical basis and a reliable analytical method. Therefore, it has become one of the important research techniques of national defense science and technology to study the electromagnetic scattering echo of complex environment and target. Combined with a ship model and standard rough sea surface, a model suitable for analyzing electromagnetic scattering from sea surface and target is established. Under the conditions of evaporation waveguide, different sea conditions and two kinds of conditions, The main contents of the research include: 1, in the different radar incident angle domain, The influence of sea surface backscattering coefficient on radar parameters and sea surface state is discussed and analyzed. In the environment of evaporative waveguide, the target radar echo is simulated. The effects of the relative position of the radiator height and the waveguide height and the characteristic quantity of the evaporative waveguide on the target radar echo are discussed. The simulation analysis of the target radar echo is carried out under different sea conditions. The variation of target radar echo with sea condition is discussed from each angle domain, and the mechanism of affecting target radar echo is analyzed. The target radar echo is considered in the environment of evaporation waveguide and different sea conditions. The propagation of evaporation waveguide on rough sea surface is studied in depth. In this paper, by combining theoretical analysis and simulation experiment, it can be seen that the backscattering coefficient is closely related to radar parameters and sea surface state, and the simulation results show that the backscattering coefficient of the sea surface is closely related to the radar parameters and the state of the sea surface. The surface evaporation waveguide enhances the radar's ability to detect the target near the sea surface, and the detection ability increases with the increase of the waveguide height, and the atmospheric humidity has a certain influence on the evaporation waveguide propagation. The target radar echo has a certain trend with the sea conditions in each angle region. The mechanism of the target radar echo is analyzed and summarized theoretically, and the surface roughness has a certain influence on the evaporation waveguide propagation through the target radar echo analysis. The rougher the sea surface, the more trapped energy will be scattered. In short, because of the sea surface's own conditions and random and changeable characteristics, the target radar scattering echo will be affected to varying degrees. The reliability of the simulation results is verified by theoretical analysis, which provides a reference for sea surface radar detection.
【學(xué)位授予單位】：哈爾濱工程大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN011;TN957.51

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