System Modelling for Spacecraft On-Board Computers

Sammanfattning: This study makes an evaluation of the usability of SysML, a system graphicalmodeling language, for capturing functional requirements for space electronicproducts. This is done by a case study in which a model of a Packet TelemetryEncoder system is developed. The report includes a brief overview of variousgraphical modeling languages. The case study illustrates how the SysML providessystem engineers with a robust modeling language. SysML is an extension to UML(unified modeling language) which is widely used by software engineers. Theextension to the UML profile includes requirements modeling, parametricmodeling, allocation and extension to structural and activity modeling. Theseextensions of the UML language are known as the SysML Profile. SysML is arepresentation of domain-specific engineering analysis models and the greatadvantage of applying the language is providing a single model to capturerequirements, system elements and the relationship between these model elements.This capability of SysML is satisfying the traceability of requirements which isrequired in every stage during the system development life cycle. SysML is amethodology and tool independent language.