Analytical Study on the Reliability of Redundancy Architecture for Flight Control Computer Based on Homogeneous Markov Process

Abstract

In order to analyze the reliability of redundancy architecture for flight control computer, this paper gives the analytical study on the reliability based on the Homogeneous Markov Process in “Triplex Channels & Single Module”and “Double Channels & Double Modules.”The paper analyzes the effect of fault rate and fault coverage rate on system reliabilities and MTTFs (mean time to failures). The index of fault tolerant capability is proposed. The analyzing results show that, for different redundancy architectures, the fault coverage rate or the branch fault rate have different effects on the reliability. Especially, the influence of the branch fault rate is more significant. In addition, the fault tolerant capability of the redundant system to multiple faults is determined by the system architecture scheme and the fault coverage rate. The results show that the method proposed in this paper can analyze reliability of redundancy architecture effectively.

Keywords

• Flight control computer
• redundancy architecture
• Markov
• reliability
• fault tolerant capability
• fault rate