Model-based safety assessment method of civil aircraft power distribution network

基于模型的民用飞机配电网络安全性评估方法

¹ School of Automation, Northwestern Polytechnical University, Xi'an 710072, China
² Shenzhen Research Institiute of Northwestern Polytechnical University, Shenzhen 518057, China

Received: 5 January 2024

Abstract

With the continuous development and continuous innovation of aviation technology, the complexity and integration of civil aircraft's power distribution network system are getting higher and higher. Therefore, its safety plays a crucial role in ensuring the safe operation of aircraft. Traditional safety assessment methods rely heavily on the engineering experience of engineers. The complex cross-linking of distribution networks reduces the effectiveness and efficiency of the safety assessment and brings difficulties to subsequent iterations. Model-based safety analysis(MBSA) can effectively reduce the complexity of analysis and iteration, and it can improve the efficiency and accuracy of safety assessment. The MBSA method is introduced. Then, the model-based safety assessment of a civil aircraft distribution network is carried out. The modeling analysis and evaluation process are constructed based on fault logic modeling. The evaluation results are presented, and further comprehensively evaluated based on expert weights. It is proven that MBSA is effective for the safety assessment of actual power distribution systems.

摘要

随着航空技术的不断发展和革新, 民用飞机配电网络系统的复杂化和综合化程度越来越高, 因此其安全性对飞机的安全飞行起着至关重要的作用。传统的安全性评估方法极度依赖工程设计人员的经验, 而配电网络的复杂交联结构极大地降低了传统系统安全性分析的有效性和评估效率。基于模型的安全性分析方法(MBSA)能够有效降低安全性评估的复杂程度及迭代困难等问题, 提升安全性评估工作效率及准确度。文中对MBSA方法进行介绍, 对某民机配电网络进行基于模型的安全性评估, 构建基于故障逻辑建模的分析及评估流程并给出评估结果, 将评估结果结合专家权重进一步进行综合评价。证明MBSA对实际系统的安全性评估是行之有效的。