Modeling of aircraft brake system in UML-B

Event-B is a formal method for system-level modeling and analysis. It has shown a great potential in formal modeling to ensure that the system is correct by construction. However, its textual and mathematical modeling process is complex and hard to master. UML-B is a graphical formal modeling notation, which is similar to UML in the front end and based on Event-B for modeling and verification. It drastically reduces modeling difficulty and makes the modeling process visual. Nevertheless the application of this new modeling language to industrial projects is far from wide spread. Hence this paper aims at providing a general modeling approach of UML-B, and giving an example of how to apply this new modeling approach in modeling an aircraft brake system. In the paper, we will show the whole process of modeling in terms of the general method, as well as verify the applicability of this technique. This case may help provide the basis of some guidelines in applying UML-B in future case study and industrial projects.