关键词: 适航认证, 综合模块化航空电子系统（IMA）, 安全性评估, 中介真值程度度量（MMTD）

Abstract: It is an important research content for safety assessment of civil aircraft and airworthiness engineering to   assess the safety of IMA (integrated modular avionics) architecture accurately and objectively. This paper presents a new synthetic method of combining safety assessment and quantitative analysis for IMA architecture supporting airworthiness certification. Firstly, this paper proposes an IMA architecture safety assessment model of multi-attributes and an evaluation indicator system based on an implementation framework of safety assessment. Then, this paper uses the theory of MMTD (measure of medium truth degree) to treat and evaluate the scores of the indicators. At last, an  example of evaluation is carried out and shows that this method can be easily operated, the results can be quantified and comparable, and it can effectively ensure the objectivity of the process and the accuracy of the results of the safety assessment of IMA architecture.

Key words: airworthiness engineering, integrated modular avionics (IMA), assessment of safety, measure of medium truth degree (MMTD)