临近空间艇载计算机余度管理策略研究

摘要

平流层飞艇是可靠性要求很高的系统，需要由具有容错能力的艇载计算机来进行控制和管理。针对艇载计算机采用的余度结构进行了软件管理策略的研究和设计，提出了基于异构总线的握手机制节点故障检测方法、基于“看门狗”与“心跳”相结合的 CPU 故障检测方法、基于节点健康矩阵的互援式总线重构方法及基于有限状态机的多 CPU 并行处理系统自适应重构方法。故障注入试验表明，艇载计算机在遇到故障时能实时检测出故障，诊断故障类型，并对故障进行处理，实现系统重构，保证了平流层飞艇长期驻空时的安全飞行。%Near space airship needs computer systems with fault tolerance to achieve high reliability. Based on the redundancy hardware of the computer used in near space airship, a software management strategy is proposed. The fault check and reconstruction method for data bus and multi-CPU system are put forward. The fault injection experiments show that, when fault happens, the redundant computer can detect and diagnose the fault in real-time. Meanwhile, it can also handle fault and reconstruction, improving the reliability of airship computer system and ensuring fight airship safety .