【摘要】：隨著電子信息技術(shù)的迅速發(fā)展,系統(tǒng)之間和設(shè)備之間的互連空間越來越小、互連結(jié)構(gòu)越來越復(fù)雜、互連線纜越來越多,大量線纜的相互串?dāng)_使得有限空間中的電磁環(huán)境變得異常復(fù)雜。為了保證電子電氣系統(tǒng)和設(shè)備的正常運(yùn)行,研究線纜的耦合特性已經(jīng)成為工程電磁兼容問題中一個(gè)重要方向。對(duì)線纜耦合的計(jì)算和仿真也是電磁兼容預(yù)測技術(shù)中的一個(gè)重要方面,具有實(shí)際應(yīng)用價(jià)值。本文主要研究線纜串?dāng)_的頻域耦合模型方法,對(duì)耦合模型的求解有以下幾個(gè)過程：提取模型的分布參數(shù)、建立模型的方程、求解方程、模型的擴(kuò)展、復(fù)雜模型的簡化。本文分別從傳輸線理論、BLT方程以及線束等效簡化方法三個(gè)方面研究了無耗多導(dǎo)體傳輸線、屏蔽線以及多導(dǎo)體傳輸線網(wǎng)絡(luò)頻域上的串?dāng)_耦合問題。多導(dǎo)體傳輸線的分布參數(shù)的計(jì)算是建立串?dāng)_耦合模型的基礎(chǔ),本文在數(shù)值方法即矩量法的基礎(chǔ)上分別進(jìn)一步研究三種典型線纜結(jié)構(gòu)的分布電容矩陣的收斂性及對(duì)稱性問題,分析匹配點(diǎn)的選取原則,給出匹配點(diǎn)的最佳分配方案。基于分布參數(shù)以及多導(dǎo)體傳輸線方程,通過模量解耦和鏈參數(shù)方法給出針對(duì)不同終端條件下的方程的解。推導(dǎo)單線與屏蔽線耦合公式并建立耦合模型。運(yùn)用傳輸線理論,在管道和節(jié)點(diǎn)概念的基礎(chǔ)上,引入了多導(dǎo)體傳輸線網(wǎng)絡(luò)的導(dǎo)納方程。分別使用仿真和并搭建實(shí)驗(yàn)平臺(tái)驗(yàn)證上述模型方法的正確性。推導(dǎo)頻域多導(dǎo)體傳輸線的BLT方程、頻域屏蔽線BLT方程,進(jìn)一步研究了線纜網(wǎng)絡(luò)的BLT超矩陣方程并給出改進(jìn)的散射超矩陣的構(gòu)造方法,將超矩陣方程其應(yīng)用于典型線纜網(wǎng)絡(luò)包括樹形網(wǎng)絡(luò)、星形網(wǎng)絡(luò)和環(huán)形網(wǎng)絡(luò)。最后在裸線線束簡化基礎(chǔ)上,調(diào)整等效步驟建立帶絕緣介質(zhì)的線束的等效簡化串?dāng)_模型。進(jìn)一步研究并建立了線束網(wǎng)絡(luò)的等效簡化模型,給出了等效簡化步驟,并用傳輸線理論和BLT方程驗(yàn)證了上述模型方法的正確性,得出簡化方法在滿足一定精度情況下可大大降低計(jì)算時(shí)間和計(jì)算內(nèi)存。
[Abstract]:With the rapid development of electronic information technology, the interconnection space between systems and devices is becoming smaller and smaller, the interconnection structure is becoming more and more complex, and the number of interconnection cables is increasing. A large number of cable crosstalk makes the electromagnetic environment in finite space extremely complex. In order to ensure the normal operation of electronic and electrical systems and equipment, the study of cable coupling characteristics has become an important direction of engineering EMC. The calculation and simulation of cable coupling is also an important aspect of EMC prediction technology and has practical application value. In this paper, the frequency-domain coupling model method of cable crosstalk is studied. The solution of the coupling model is as follows: extracting the distribution parameters of the model, establishing the equation of the model, solving the equation, extending the model and simplifying the complex model. In this paper, the crosstalk coupling problems in frequency domain of lossless multi-conductor transmission lines, shielded lines and multi-conductor transmission line networks are studied from the three aspects of the transmission line theory, BLT equation and the equivalent simplification method of the beam. The calculation of the distribution parameters of multi-conductor transmission lines is the basis of establishing a crosstalk coupling model. In this paper, the convergence and symmetry of the distributed capacitance matrices of three typical cable structures are studied respectively on the basis of the numerical method or the method of moments. The selection principle of matching points is analyzed and the optimal allocation scheme of matching points is given. Based on the distributed parameters and the multi-conductor transmission line equations, the solutions of the equations under different terminal conditions are given by means of modulus decoupling and chain parameter methods. The coupling formula of single line and shielding line is derived and the coupling model is established. Based on the concept of pipeline and node, the admittance equation of multi-conductor transmission line network is introduced by means of transmission line theory. Simulation and experimental platform are used to verify the correctness of the model. The BLT equation of multiconductor transmission line in frequency domain and the BLT equation of shielding line in frequency domain are derived. The BLT supermatrix equation of cable network is further studied and the method of constructing improved scattering supermatrix is given. The hypermatrix equation is applied to typical cable networks, including tree network, star network and ring network. Finally, based on the simplification of bare wire harness, the equivalent simplified crosstalk model of wire harness with insulator is established by adjusting the equivalent step. Furthermore, the equivalent simplified model of wire harness network is studied and established, and the equivalent simplification steps are given. The correctness of the above model is verified by transmission line theory and BLT equation. It is concluded that the simplified method can greatly reduce the computing time and memory under certain precision.
【學(xué)位授予單位】：東南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TN03

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