随着航空电子技术的进步和飞机功能需求的增加,机载系统变得越来越复杂。由于高度综合的复杂系统不可能通过试验来验证所有的系统特性,因此,需要制定统一的标准,对其安全性设计方法和过程进行控制,以满足适航规章的要求。本文重点介绍了系统安全性评估所使用的四种分析方法。 With the advances in avionics and the increasing demand for aircraft capabilities, airborne systems have become more sophisticated. Because highly complex and complex systems can not be tested to verify all system characteristics, there is a need to develop uniform standards to control their safety design methods and processes to meet the requirements of airworthiness regulations. This article focuses on the four analysis methods used for system security assessment.