具备重构能力的三模冗余器载计算机研究

Research on reconfigurable triple-module redundancy space on-board computer

摘要:

器载计算机是航天器电气系统的重要组成部分，需要冗余技术来满足其高可靠性运行要求。为了保证航天器上计算机在出现异常故障时仍能正常工作，对传统三模容错结构、具有降级功能的三模容余结构的体系结构、算法原理、关键技术等内容进行了研究。综合使用多种检测机制确保可靠锁定故障机，基于故障机无法修复时再逐步降级使用的策略，以正常工作的当班机为基础，通过故障机在每个流程的开始读取刷新后的当班机指针和重要状态参数并在流程的结束向当班机发送同步请求的方式，提出了一种具备重构能力的三模冗余器载计算机设计方案，设计了三模冗余重构流程，使故障机具备自修复的能力。实践表明，该重构方法能有效地提高器载计算机系统的可靠性，对高可靠器载计算机设计与实现具有较好的工程参考意义。

Abstract:

On-board computer system is the crucial component in spacecraft electronic system,and its reliability is especially essential to achieve final mission. In this paper, system architecture, principle and key technology of traditional and degraded triple-module redundancy computer are introduced, then presents a design scheme of reconfigurable triple-module redundancy space on-board computer. Practice indicates that the reconfigurable scheme can effectively improve the reliability of space on-board computer system, and the paper has engineering application value for design and implementation of space on-board computer system with high reliability.