發(fā)布時(shí)間：2018-02-05 04:42

  本文關(guān)鍵詞： 空間目標(biāo) 輻射散熱 紅外特性 建模與仿真　出處：《紅外與激光工程》2017年06期 　論文類型：期刊論文

【摘要】：首先介紹了用于保證空間目標(biāo)正常工作常用的輻射散熱器分類,并闡述了其運(yùn)行模式及使用條件。總結(jié)了現(xiàn)有的空間目標(biāo)紅外特性模型,并進(jìn)一步分析,將空間目標(biāo)外表面區(qū)域分為一般區(qū)域和輻射散熱區(qū)域,建立不同的能量方程。以FY-1C為例,根據(jù)空間目標(biāo)的軌道特性、材料特性和結(jié)構(gòu)特性,使用有限單元法分析得到空間目標(biāo)外表面的溫度場分布,在散熱功率為0 W和100 W的情況下,散熱區(qū)域溫差最大為51.49℃。結(jié)合溫度場分布和軌道特性,進(jìn)一步計(jì)算得到空間目標(biāo)在距離5 km的探測系統(tǒng)入瞳處的輻射照度。當(dāng)目標(biāo)處于地球陰影區(qū),目標(biāo)散熱區(qū)域接收到的地球自發(fā)輻射和地球反射輻射入射角很大,可以忽略不計(jì),此時(shí)目標(biāo)的輻射照度在兩種散熱功率下相差1~2個(gè)數(shù)量級。在日照區(qū),由于目標(biāo)反射輻射的影響,不同的散熱功率只對長波波段的輻射特性有一定影響。
[Abstract]:Firstly, the classification of radiator used to ensure the normal operation of space targets is introduced, and its operation mode and operating conditions are described. The existing infrared characteristic models of space targets are summarized and further analyzed. The outer surface area of space target is divided into general region and radiation region, and different energy equations are established. Taking FY-1C as an example, according to the orbit characteristic, material characteristic and structure characteristic of space target. The temperature field distribution on the outer surface of the space target is obtained by finite element method, and the heat dissipation power is 0 W and 100 W respectively. The maximum temperature difference in the heat dissipation region is 51.49 鈩，

本文編號：1492151