22nd Congress of International Council of the Aeronautical Sciences, Harrogate, UK, 28 August - 1st September, 2000
Paper ICAS 2000-6.2.3

INTERRELATION RELIABILITY ANALYSIS OF FAULT TOLERANT FLIGHT CONTROL SYSTEM

S. Wang
Department of Automatic Control, Beijing University of Aeronautics and Astronautics, PRC

Keywords: reliability, flight control system, fault tolerant

Modern Fault-tolerant Flight Control Systems (FFCS) are mostly composed of hardware and software which performance is affected by their interrelation such as function, running, failure and maintenance. Therefore, when analyzing the system’s reliability, the influence of their interaction must be considered. In this paper, we study on the interrelation reliability analysis of the fault-tolerant flight control system with combination of FMECA and FTA. This method is partly based on the knowledge database, that is, some of the FMECA information comes from the knowledge database, and the other comes from the analyzers. When the FMECA information of the system is enough, the subtrees of the system’s typical components can be constructed with the aid of the computer, and that will help the analyzers finish the construction of the system’s entire fault tree.

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