本文選題：有源相控陣天線 + 冷板��； 參考：《西安電子科技大學》2014年碩士論文

【摘要】：有源相控陣天線(APAA)陣面存在大量對溫度敏感的T/R組件,且T/R組件內部隨機分布數量眾多的發(fā)熱器件,陣面溫度分布不合理將嚴重影響天線相位控制精度,同時熱變形也會導致天線單元的方向圖發(fā)生改變,使電性能達不到要求甚至無法實現,因此,高效的APAA散熱系統必不可少。液冷冷板作為一種高效成熟的換熱設備,可以有效解決APAA的散熱問題,在電子設備熱設計方面的應用有著廣闊的前景。首先,本文提出了一種基于器件位置的有源相控陣天線冷板機電熱耦合設計方法。此種方法的具體設計步驟為:第一,確定有源相控陣天線T/R組件中發(fā)熱器件的位置參數,采用添加輔助點與優(yōu)先經過熱源的思想設計冷板流道的拓撲形狀,得到天線冷板幾何模型,并建立天線陣面有限元模型;第二,根據有源相控陣天線T/R組件中各個發(fā)熱器件的熱耗等參數,計算天線陣面的溫度場分布,分析陣面由熱引起的結構變形以及由溫度變化引起的激勵電流幅度誤差、相位誤差,并且計算有源相控陣天線的電性能;最后,根據增益的指標是否達到要求,通過修改流道截面的幾何參數重復以上步驟來確定出最優(yōu)的有源相控陣天線冷板的設計方案。再者,文中針對航空電子模塊輕量化的要求,對某天線冷板進行了面向輕量化的熱優(yōu)化設計。主要的設計方法可以概括為:分析該冷板模型的特點,對模型進行簡化處理;在優(yōu)化前期通過對該模型進行散熱參數影響機理分析,來確定冷卻液的入口位置和熱優(yōu)化中將要選用的冷卻液的類型;確定散熱參數以后,把冷板的質量作為優(yōu)化目標,通過分析各個變量對質量的影響大小來確定設計變量,進而確定數學優(yōu)化模型并選取合適的優(yōu)化方法,使該冷板在滿足熱設計要求的基礎上,達到質量最輕的目的。在此模型中,通過對冷卻液的入口流速和冷卻通道截面直徑進行優(yōu)化,使天線冷板的質量減輕了0.279kg。最后,分析了有源相控陣天線中T/R組件溫度對陣列天線電性能的影響,具體包括最高溫度和溫度一致性兩方面對天線電性能的影響。通過分析可知不同類型的T/R組件對天線電性能的影響是不同的,且有源相控陣天線在進行散熱設計時最高溫度要求和溫度一致性要求都是以保證天線電性能為出發(fā)點確定的。通過具體分析可知Ku波段、X波段和L波段對T/R組件最高溫度的要求分別為73?C、82?C和89?C,對T/R組件溫度最大允許溫差的要求分別為3.95?C、5?C和8?C。
[Abstract]:There are a large number of temperature-sensitive T / R modules on the active phased array antenna (APAA), and a large number of heating devices are randomly distributed in the T / R module. The unreasonable temperature distribution on the antenna surface will seriously affect the precision of antenna phase control. At the same time, the thermal deformation will change the pattern of antenna elements, which makes the electrical performance can not meet the requirements or even can not be realized. Therefore, an efficient APAA heat dissipation system is essential. As a kind of high efficient and mature heat exchanger, liquid cooling plate can effectively solve the heat dissipation problem of APAA, and has a broad prospect in the thermal design of electronic equipment. Firstly, an electromechanical and thermal coupling design method of active phased array antenna cold plate based on device position is proposed. The specific design steps of this method are as follows: first, the position parameters of the heating device in the active phased array antenna T / R module are determined, and the topology of the cold plate runner is designed by the idea of adding auxiliary points and preferentially passing through the heat source. The geometry model of antenna cold plate is obtained, and the finite element model of antenna array surface is established. Secondly, the temperature field distribution of antenna antenna surface is calculated according to the heat consumption and other parameters of each heating device in active phased array antenna T / R module. The structure deformation caused by heat and the amplitude error and phase error of exciting current caused by temperature change are analyzed, and the electrical performance of active phased array antenna is calculated. By modifying the geometric parameters of the channel section, the above steps are repeated to determine the optimal design scheme of the active phased array antenna cold plate. Furthermore, according to the lightweight requirement of avionics module, a lightweight thermal optimization design for an antenna cold plate is carried out. The main design methods can be summarized as follows: analyzing the characteristics of the cold plate model, simplifying the model, analyzing the influence mechanism of heat dissipation parameters on the model in the early stage of optimization, To determine the inlet position of the coolant and the type of the coolant to be selected in the thermal optimization; after determining the cooling parameters, the quality of the cold plate is taken as the optimization objective, and the design variables are determined by analyzing the influence of each variable on the quality. Then the mathematical optimization model is determined and the appropriate optimization method is selected so that the cooling plate can achieve the lightest mass on the basis of meeting the thermal design requirements. In this model, by optimizing the inlet velocity of the coolant and the cross-section diameter of the cooling channel, the quality of the antenna cold plate is reduced by 0.279 kg. Finally, the effect of T / R component temperature on the electrical performance of the active phased array antenna is analyzed, including the effect of maximum temperature and temperature consistency on the electrical performance of the antenna. The results show that the effects of different T / R modules on antenna electrical performance are different, and the maximum temperature requirement and the temperature consistency requirement of active phased array antenna are determined by ensuring the antenna electrical performance. The results show that the maximum temperature requirements of Ku-band X band and L band for T / R module are 73 C and 89 C, respectively, and the maximum allowable temperature difference for T / R module is 3.95 C and 8 C, respectively.
【學位授予單位】：西安電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN821.8

【共引文獻】

相關期刊論文 前2條

1 段寶巖;;電子裝備機電耦合研究的現狀與發(fā)展[J];中國科學:信息科學;2015年03期

2 李U，

本文編號：1786936