基于模型的飞机级功能危险评估方法研究

Research for model-based functional hazard assessment method at aircraft level

民用飞机的设计过程中需要进行安全评估,功能危险评估是飞机安全评估的第一步。传统的功能危险评估方法在处理功能依赖关系和分析多重失效组合方面存在困难。本文提出一种基于模型的飞机级功能危险评估方法,采用层次化模型描述飞机功能、人类行为和飞机行为之间的内在联系,并通过C++实现的算法计算了导致飞机发生故障的功能失效组合。通过对飞机起飞阶段的案例分析,证明了本方法的可行性,为功能危险评估提出了一种新的思路。

The design process of civil aircraft includes safety assessment,of which functional hazard assessment is the first step.Classical method of functional hazard assessment has a problem of identifying functional dependencies as well as the effects of multiple functional failure conditions.In this paper,a model-based Functional Hazard Assessment method is presented.We use hierarchical model to describe the relationship among aircraft functions,human behaviors and aircraft behaviors,and use C + + to calculate related functional failure combinations which cause aircraft malfunctions.Finally,we study the take-off occasion as an example to certify the validity of our method,which shows a new direction for functional hazard assessment.