【摘要】：現(xiàn)代戰(zhàn)爭的結(jié)果越來越取決于科學(xué)技術(shù)的先進(jìn)程度,攻擊系統(tǒng)表現(xiàn)出對敵方的突破打擊能力,防御系統(tǒng)則體現(xiàn)了對己方軍事力量的保護(hù)能力。本課題從實(shí)戰(zhàn)角度出發(fā),對機(jī)載紅外告警系統(tǒng)進(jìn)行研究,用于增強(qiáng)己方防護(hù),該告警系統(tǒng)利用了紅外探測器實(shí)現(xiàn)對飛機(jī)、導(dǎo)彈等目標(biāo)的檢測。本文首先對紅外探測器的作用距離及天空小目標(biāo)的紅外特性進(jìn)行了探討和仿真,根據(jù)實(shí)驗(yàn)結(jié)果確定了告警系統(tǒng)所使用的紅外探測器;接著研究了慣性傳感器測量值與探測器視場的關(guān)系,建立了慣性傳感器與相鄰圖像單應(yīng)矩陣之間的數(shù)學(xué)模型,該方法有效減少了視場配準(zhǔn)所用時(shí)間,為告警系統(tǒng)的實(shí)時(shí)檢測奠定基礎(chǔ);為了削弱天空中云層運(yùn)動對紅外告警系統(tǒng)的影響,提出了將目標(biāo)分類處理的思想,在圖像處理階段選擇不同方式,將系統(tǒng)資源進(jìn)行了合理分配,降低了系統(tǒng)處理復(fù)雜度;在紅外小目標(biāo)探測中,采用了恒虛警控制方式對分割閾值進(jìn)行自適應(yīng)設(shè)置,優(yōu)化了目標(biāo)檢測過程,通過對比實(shí)驗(yàn)說明了該方法的有效性;在系統(tǒng)目標(biāo)數(shù)據(jù)關(guān)聯(lián)部分,通過目標(biāo)運(yùn)動軌跡對虛假目標(biāo)進(jìn)行剔除,進(jìn)一步降低了告警系統(tǒng)的虛警率。對本文提出的機(jī)載紅外告警系統(tǒng),采用FPGA+DSP硬件化設(shè)計(jì),并進(jìn)行數(shù)據(jù)采集及分析,結(jié)果表明該告警系統(tǒng)很好地滿足了項(xiàng)目設(shè)計(jì)要求,具有良好精度且性能穩(wěn)定。
[Abstract]:The result of modern war depends more and more on the advanced degree of science and technology. The attack system shows the ability to break through and attack the enemy, while the defense system embodies the ability to protect the military forces of one's own side. In this paper, the airborne infrared warning system is studied from the point of view of actual combat, which is used to enhance the self-protection. The infrared detector is used to detect the aircraft, missile and other targets. In this paper, the operating range of the infrared detector and the infrared characteristics of the small target in the sky are discussed and simulated. According to the experimental results, the infrared detector used in the alarm system is determined. Secondly, the relationship between the measured value of inertial sensor and the field of view of the detector is studied, and the mathematical model between the inertial sensor and the monoclinic matrix of adjacent images is established. This method can effectively reduce the time of field of view registration. It lays a foundation for real-time detection of alarm system. In order to weaken the influence of the cloud movement in the sky on the infrared warning system, the idea of classifying the target is put forward. In the image processing stage, the system resources are allocated reasonably and the complexity of the system processing is reduced. In infrared small target detection, the CFAR control method is used to set the segmentation threshold adaptively, and the target detection process is optimized. The effectiveness of the method is proved by the comparison experiment. In the target data association part of the system, the false target is eliminated by the moving trajectory of the target, and the false alarm rate of the alarm system is further reduced. The airborne infrared warning system proposed in this paper is designed with FPGA DSP hardware, and data acquisition and analysis are carried out. The results show that the alarm system meets the project design requirements well, and has good precision and stable performance.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN21

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