Validation of an implementation of MBSE and the possibility of Simulating System Models

Sammanfattning: Model-Based Systems Engineering (MBSE) is the process of developing a set of system models that help define, design and document a system under development. These models provide an efficient way to explore, update, and communicate system perspectives to stakeholders, while eliminating dependence on traditional documents. It is also a cost-effective way to test and explore new system characteristics by testing early and getting feedback on different design decisions fast. Saab Surveillance has developed a version of MBSE to create system models for Saab's products. These models are made in the modelling tool Rhapsody Architect for SYstems Engineers [1] and use SysML as modelling language. With the evolution of electronic warfare systems, the complexity of these system models escalate progressively. This gives a great need for model validation and simulation in order to verify and improve systems both in the start and under development. The purpose of this thesis was to examine the possibility of validating and simulating the system models created in the business unit EW Systems at Saab Surveillance. The examination included a validation of the EW-MBSE system design and a suggestion of modelling modifications and tools needed in order to be able to simulate the MBSE models in early stages. The result showed that EW-MBSE is an accurate modelling method that does not need many modifications in order to support model validation and simulation. AS for the modelling tools, Rhapsody Designer for Systems Engineers [2] is a suitable choice for functional perspectives. Furthermore, it should be possible to supplement the MBSE models with mathematical models in Simulink [11] and integrate them in Rhapsody for continuous simulations. However, this was not possible to implement in this thesis because of reason described in chapter 4.1.3.