城市轨道交通信号控制系统软件安全完整性自动化测试方法探讨

城市轨道交通信号控制系统在其安全性、可靠性、可用性和可维护性方面都有很高的要求,尤其针对软件安全完整性等级为4级(SIL4)的系统或子系统,在其测试方法和流程方面都有国际性的标准参考(如欧洲标准EN50128)。测试在遵从标准的前提下,其测试方法应用和测试实践经验也是有所不同的,介绍了软件安全完整性的概念以及标准要求的各种测试流程,并对实际操作方法加以分析,深入探讨了轨道交通信号控制系统软件安全完整性集成自动化测试平台的设计、应用方法和评估。

Automatic Testing Approach to Software Safety Integrity in Urban Rail Signalling System Control

Urban rail signaling control system requires high standard in safety, reliability, availability and maintainability, especially the degree of SIL4 system or the subsystems are tested with procedure and methodology defined in international standard (CENELEC EN50128).Following the explicit industrial standard, the testing approaches may be various in methods and practical experiences.In the article, the concep of software safety integrity and requirements for different testing procedures are explained, the practical testing approaches for each step are analyzed, alsothe design, application and assessment of the integrated automatic testing platform are discussed in-depth.