【摘要】 针对微小卫星星载计算机系统对可靠性和实时性的苛刻要求,提出一种冷、热备份并存的微小卫星星载计算机系统设计方案。利用计算机系统可靠性理论和马尔可夫链理论对该系统方案的可靠性进行建模、计算和分析。计算结果表明该方案既保留了热备份实时性好的优点,同时在一般条件下,三年内星载计算机系统可靠度能够达到0.97以上,能够满足一般微小卫星星载计算机系统的可靠性需求。更多还原

【Abstract】 A design project of on-board computers of micro-satellite including spare system and parallel system is proposed according to the rigorous requirements for reliability and real-time performance.The reliability of the design project is modeled and calculated based on reliability theory of computer system and Markov chain.The calculated results prove that the design project can do well in both reliability and real-time performance.Generally,the reliability of the on-board computers system is up to 0.97 within three years,which can meet the requirements of general on-board computer systems of micro-satellites.更多还原