基于在线加载分区机制的重构方案的设计与实现

摘要

With the further development of Integrated Modular Avionics (IMA), it requires much more security and reliability of the Avionics system. This paper proposes a reconfiguration blueprint of IMA based on the mechanism of Online-Loaded partition in VxWorks653 system. The blueprint can load applications dynamically, so that IMA system can do the function migration according to the default configuration when a failure occurs, which will implement the reconfiguration of IMA system. Based on this blueprint, this paper also designs a fractional steps loading technology, which will reduce the time of the reconfiguration obviously and improve the efficiency of the reconfiguration through testing.%随着综合模块化航空电子系统（IMA）结构技术的发展，对航电系统的安全性和可靠性的要求也进一步提高。本文提出的IMA重构方案基于VxWorks653系统中的在线加载分区(Online-Loaded)机制，可以做到对应用程序的动态加载，使得IMA系统在发生故障时能按预设的配置进行功能迁移，从而实现IMA系统的重构。在该重构方案的基础上还同时设计了分步加载技术。测试验证表明，分步加载技术明显减少了重构的耗时，提高了重构的效率。