基于软件的故障诊断与系统重构方法

A METHOD OF FAULT DIAGNOSIS AND SYSTEM RECONFIGURATION BASED ON SOFTWARE

本文提出了一种不使用传统的核心硬件(硬件表决器),而是用软件的方法实现星载计算机故障诊断与系统重构的方法。为实现这一目的,硬件系统采用多处理机/多总线的体系结构,软件系统采用基于五个层次一致的支撑环境软件系统。为了保证资源的有效利用,这一系统不是根据一次检测结果直接进行故障诊断与系统重构,而是将多次检测出来的错误记入错误记录表中,根据错误记录表的内容进行局部诊断,基于局部诊断结果再进行全局诊断,然后才进行系统重构。本文最后通过仿真系统验证了所提出的故障诊断及系统重构方法的可行性。

A method of fault diagnosis and system reconfiguration through software instead of the traditional hardware core (hardware voter)is presented.For this purpose, we adopt the multiprocessor and multibus architecture.The supporting software system is based on the consensus of five layers. To utilize resource efficiently,the system will not reconfigure itself immediately based upon the result of one iteration of detection. Instead, the errors detected in each iteration of detection are accumulated and recorded in the error table that is the basis of the local diagnosis.Then the local diagnosis results are used for the global diagnosis, and then the system reconfigures itself according to the global diagnosis results. Lastly, the feasibility of the method of fault diagnosis and system reconfiguration is verified through a simulation system.