论文部分内容阅读
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 m W和54.411 m W。在-40℃~85℃时,原理样机均可正常工作。
Pico satellites are characterized by low cost and responsiveness, and are the hot topics in aerospace field. Due to size and quality limitations, the large satellite complex on-board computer system architecture does not apply to picosatellites. This paper introduces the modular design technology of on-board PES satellite-based computer system based on COTS device, and applies the multi-criteria decision-making TOPSIS sorting method to the chip selection of pico-satellite. Development of 2-based computer prototype of low-power micro-control unit prototype, and through a large number of experiments to compare the prototype version 2 prototype speed, power consumption, operating temperature and other performance. When the working temperature is 27 ℃ and the dominant frequency is 8 MHz, the MIPS of the prototype based on the MSP430 chip and the ATxmega chip are 7.449 and 6.781, respectively. The operation addition time is 0.613μs and 1.381μs, respectively, and the power consumption is 38.224 m W and 54.411 m W. At -40 ℃ ~ 85 ℃, the principle of the prototype can work properly.