论文部分内容阅读
系统可靠性是决定飞机飞控计算机系统(FCCS)体系结构选型的重要依据,可靠性建模技术(SRMT)是定量评价系统可靠性的关键。目前有可靠性框图(RBD)、故障树分析(FTA)、Markov随机过程和Petri网等多种系统可靠性建模方法,由于求解的途径不同,各种方法都具有优缺点。文章综合静态和动态系统可靠性建模方法特点,提出一种分类划分和分级组合的系统可靠性建模(HCRM)方法,并用该方法对Boe-ing777飞机非相似余度FCCS进行了可靠性建模。与传统方法比较,该方法将基于状态的可靠性建模方法和非状态可靠性建模方法进行组合,并基于系统静态和动态特性分级建模和求解,在一定程度上化解了复杂系统可靠性建模的复杂度和求解难度,使系统可靠性模型更加精细和符合实际系统。
System reliability is an important basis for the selection of the aircraft flight control computer system (FCCS) architecture. Reliability Modeling Technology (SRMT) is the key to quantitatively evaluate system reliability. At present, there are reliability modeling methods such as Reliability Diagram (RBD), Fault Tree Analysis (FTA), Markov Stochastic Process and Petri Net. Because of different solutions, each method has advantages and disadvantages. In this paper, based on the characteristics of static and dynamic system reliability modeling methods, a system reliability modeling (HCRM) method based on classification and hierarchical combination is proposed. By using this method, the reliability of the Boe-ing777 aircraft non-similar redundancy FCCS mold. Compared with the traditional method, this method combines the state-based reliability modeling method and the non-state reliability modeling method, and based on the system static and dynamic characterization modeling and solving, to a certain extent, the complex system reliability The complexity of modeling and the difficulty of solving make the system reliability model finer and conform to the actual system.