摘要
星载计算机是卫星进行星务管理和有效载荷计算的核心设备,由于要高速处理大量数据所以采用多处理器并行处理。但在空间运行期间,星载计算机设备一直处于宇宙空间带电粒子构成的辐射环境中,强辐射会造成星载计算机出现瞬时故障而影响卫星业务的正常运行。本文通过应用级软件容错的手段提高系统的可靠性,基于并行复算的思想,提出容错并行算法。通过对(NPB)基准测试程序修改,使其在VxWorks提供的Socket通信接口下实现相应的容错并行算法,并在VxWorks Simulator以及星载平台上进了正确性测试。
On-board computer is the core of satellite service management and the satellite payload computing devices, which adopts multi-processor and parallel operation due to the high-speed processing of the large amounts of data. During the satellite operating in space, on-board computer equipment will remain in the radiation environment of charged particles. The strong radiation will make transient failures that affect the normal operation of satellite services. In this paper, application-level software fault-tolerance is applied to improve system reliability, and fault-tolerant parallel algorithm is proposed based on parallel ideas. Through revising NPB benchmark procedure, implementation of the corresponding fault-tolerant parallel algorithm is available by the socket communication interface which provided by VxWorks, the validating tests are given on VxWorks Simulator and real on-board computer.
出处
《航空兵器》
2010年第4期35-39,共5页
Aero Weaponry
基金
航空科学基金资助(20080188003)
863计划项目(2007AA12Z147)
关键词
星载计算机
并行基准测试程序
容错设计
并行算法
on-board computer
NAS Parallel Benchmark （NPB）
fault-tolerance design
parallel algorithm
