计算机工程
計算機工程
계산궤공정
COMPUTER ENGINEERING
2015年
2期
287-291,297
,共6页
皮卫星%星载计算机%低功耗微控制器%商用器件%TOPSIS方法%可靠性
皮衛星%星載計算機%低功耗微控製器%商用器件%TOPSIS方法%可靠性
피위성%성재계산궤%저공모미공제기%상용기건%TOPSIS방법%가고성
pico-satellite%On-board Computer ( OBC )%low power Micro Control Unit ( MCU )%Commercial Off-the-shelf( COTS) device%Technique for Order of Preference by Similarity to Ideal Solution( TOPSIS) method%reliability
皮卫星具有成本低、反应灵敏等特点,是航天领域的研究热点。由于体积和质量的限制,大卫星复杂的星载计算机系统结构并不适用于皮卫星。介绍基于COTS器件的皮卫星星载计算机系统模块化设计技术,将多准则决策方法TOPSIS排序法应用于皮卫星的芯片选型。研制2版基于不同低功耗微控制单元的计算机原理样机,并通过大量实验测试比较2版原理样机的速度、功耗、运行温度等性能。当工作温度为27℃,主频为8 MHz时,基于MSP430芯片和ATxmega芯片的原理样机的MIPS值分别为7.449和6.781；运行加法运算的时间分别为0.613μs和1.381μs,功耗分别为38.224 mW和54.411 mW。在-40℃~85℃时,原理样机均可正常工作。
皮衛星具有成本低、反應靈敏等特點,是航天領域的研究熱點。由于體積和質量的限製,大衛星複雜的星載計算機繫統結構併不適用于皮衛星。介紹基于COTS器件的皮衛星星載計算機繫統模塊化設計技術,將多準則決策方法TOPSIS排序法應用于皮衛星的芯片選型。研製2版基于不同低功耗微控製單元的計算機原理樣機,併通過大量實驗測試比較2版原理樣機的速度、功耗、運行溫度等性能。噹工作溫度為27℃,主頻為8 MHz時,基于MSP430芯片和ATxmega芯片的原理樣機的MIPS值分彆為7.449和6.781；運行加法運算的時間分彆為0.613μs和1.381μs,功耗分彆為38.224 mW和54.411 mW。在-40℃~85℃時,原理樣機均可正常工作。
피위성구유성본저、반응령민등특점,시항천영역적연구열점。유우체적화질량적한제,대위성복잡적성재계산궤계통결구병불괄용우피위성。개소기우COTS기건적피위성성재계산궤계통모괴화설계기술,장다준칙결책방법TOPSIS배서법응용우피위성적심편선형。연제2판기우불동저공모미공제단원적계산궤원리양궤,병통과대량실험측시비교2판원리양궤적속도、공모、운행온도등성능。당공작온도위27℃,주빈위8 MHz시,기우MSP430심편화ATxmega심편적원리양궤적MIPS치분별위7.449화6.781；운행가법운산적시간분별위0.613μs화1.381μs,공모분별위38.224 mW화54.411 mW。재-40℃~85℃시,원리양궤균가정상공작。
Pico-satellite,which features low cost and flexiblity,is a hot topic in aerospace applications. Due to the limitation of size and weight,design of On-Board Computer( OBC) for pico-satellite systems is different with that in the larger satellites. This paper introduces the modular design techniques of an OBC based on Commercial Off-the-Shelf ( COTS) devices for pico-satellites. The chip selection is important for electronic system design. The selection of the suitable COTS devices is performed by using Technique for Order of Preference by Similarity to Ideal Solution( TOPSIS) method. Two versions of prototype OBC systems based on different types of low power MCUs which are selected by TOPSIS method are implemented. The running speed, power consumption, and operational temperature of two OBC systems are tested and compared. When operational temperature is 27℃ and main frequency is 8 MHz,the MIPS of OBC system based on MSP430 and ATxmega are 7. 449 and 6. 781,respectively. The running times of addition are 0. 613 μs and 1. 381 μs,respectively. The power consumptions of addition are 38. 224 mW and 54. 411 mW, respectively. The performance of the OBC system based on MSP430 is better. Two OBC systems can work correctly at -40℃ to 85℃.
