摘要
为了避免无人机相似余度飞控计算机因发生共态故障而引发灾难性后果,研究了一种运用非相似余度技术来提高无人机飞控计算机可靠性与容错能力的方法;首先,对非相似余度飞控计算机的结构及其工作原理进行描述;然后,重点讨论非相似余度技术中的关键问题;通过分析与设计,给出了任务同步、非相似余度切换等关键技术在工程实现中的硬件电路与软件流程;非相似余度在线切换的仿真结果表明,该方案能较好完成飞控计算机的双机切换,有效地保证了系统的可靠性并提高了容错能力。
In order to reduce UAV （Unmanned aerial vehicle） similar redundancy flight control computer common--mode failures, this paper researches a method, using dissimilar redundancy technology to improve reliability and fault tolerant ability of UVA flight control computer. First, the system architecture and basic principle of dissimilar redundancy flight control computer are described briefly. Second, the key problems of dissimilar redundancy technique are discussed. The key techniques such as synchronization schema and dissimilar redundancy switehover are analyzed, then connection in hardware and arithmetic in software in engineering realization are designed. The simulation results of dissimilar redundancy on--line switchover shows that this design can better fulfill dual computer switchover of flight control computer, ensure reliability of the system effectively and improve the fault tolerant ability.
出处
《计算机测量与控制》
北大核心
2013年第2期451-453,457,共4页
Computer Measurement &Control
关键词
非相似余度
任务同步
双机切换
dissimilar redundancy
synchronization schema
dual computer switchover
