Study and application of fault injection in HLA-based train control simulation system

Based on basic theory and methods of fault injection, the software-based fault injection was constructed for distributed and inter-operated simulation architecture based on High Level Architecture (HLA). The fault test program of communication in train control simulation system was designed. The fault injection tools were used to control train control model. Every module in train control model should follow fault test program to operate. The failure process of train control system could be shown by simulation interface. There are three steps in fault injection. Firstly, fault test program was loaded into fault injection tools; secondly, fault injection tools distributed instructions of fault test program to every related subsystem; thirdly, every subsystem followed the steps during operation. Analysis results shows that fault injection method could be effectively applied in train control simulation system simulation based on HLA to improve reliability of simulation system.