随着冗余技术在民用飞机电传飞控系统中应用的增加,飞控系统存在由于共模故障丧失的可用性,终极备份可被用以缓解共模故障的影响。该文在三余度飞控系统架构的基础上设计了双输入远程电子、双伺服回路作动器以及推力控制飞机三种终极备份方案,对三种方案进行了原理性的描述,同时对方案的优缺点进行了分析,分析结果可供实际设计参考。 With the increasing use of redundant technology in fly-by-wire fly-by-wire systems for civil aircraft, the availability of fly-by-control systems lost due to common-mode failures can be used to mitigate the effects of common-mode faults. Based on the architecture of three redundant flight control system, this paper designs three kinds of ultimate backup schemes: dual input remote electronic actuator, dual servo loop actuator and thrust control aircraft. The three schemes are described in principle. At the same time, The advantages and disadvantages of the analysis, the analysis results for the actual design reference.