基于STPA-ANP模型的民机系统安全性分析

随着民机系统复杂程度不断提高, 传统的安全性分析方法已不能完全满足危险源高效识别的要求, 为有效分析和评估民机系统安全性, 提出系统理论过程分析(system-theory process analysis, STPA)和网络分析法(analytic network process, ANP)相结合的安全性分析方法。针对STPA没有给出完整的关键致因分析与评估过程, 将STPA与ANP关键结构对应结合, 对危险控制动作进行致因分析和评估, 得到危险控制动作关键致因。以某型民机数字式飞控系统为例展开分析, 通过形式化建模验证及仿真验证, 证明该模型方法可以准确和完整地识别分析系统潜在危险并确定危险关键致因, 为民机系统安全性分析提供支持。

Safety analysis for civil aircraft system based on STPA-ANP model

With the increasing complexity of civil aircraft systems, traditional safety analysis methods can not fully meet the requirements of hazard identification. In order to effectively analyze and evaluate the safety of civil aircraft systems, a safety analysis method combining system-theory process analysis (STPA) and analytic network process (ANP) is proposed. STPA did not provide a complete process of crucial causal factors analysis and evaluation. By combining STPA with the key structure of ANP, the causal factors are analyzed and evaluated to obtain the crucial causal factors of the unsafe control actions. Taking a certain type of digital flight control system of civil aircraft as an example, it is proved that the model method can accurately and completely identify and analyze the potential unsafe control actions of the system and determine the crucial causal factors of the risks through formal modeling and simulation verification. It provides support for the security analysis of civil aircraft system.