一类冗余星载惯性基准的可靠性分析

摘要

提出一种用于冗余惯性参考系统可靠性研究的新的组合方式，并将其应用到星载惯性姿态参考基准上.通过理论分析可知，冷贮备系统的可靠度要比K/N［G］系统的可靠度高，但K/N［G］系统由于可以提供冗余的测量数据而使系统能够得到更为精确的结果.讨论了K/N［G］系统与冷贮备系统的混合型系统：后备-冷贮备系统和后备-K/N［G］系统.从分析结果中可以明显看出，后备-冷贮备系统的可靠性趋于冷贮备系统，而后备-K/N［G］系统的可靠性趋于K/N［G］系统.依照这些特殊冗余方案来设计惯性姿态参考基准的四陀螺安装方案，为工程实现既具有高可靠性，又具有较好的导航性能作了理论上的准备.%Presents a new approach for reliability analysis of redundant inertial reference system and its application to the redundant inertial attitude reference system of satellite, and concludes from results of analysis that the reliability of cold store redundant system is better than that of K/N［G］ system but K/N［G］ system can provide redundant measured data, which gives a more accurate result to the system, and describes the backup-cold store redundant system and backup-K/N［G］ system, two hybrid systems of cold store redundant system and K/N［G］ system, and points out that the reliability of backup-cold store redundant system approximates to that of the cold store redundant system and the reliability of backup-K/N［G］ system approximates to that of K/N［G］ system, and the use of these redundant schemes for design of a four-Gyros inertial referenced system lays a theory fundament for engineering practice with high reliability and better navigation performance.