Application of model-based diagnostic technology on the Boeing 777Airplane

摘要

This paper describes the application of model based diagnostictechnology to the Central Maintenance Computer for the Boeing 777Airplane. The paper presents an overview of model based diagnostictechnology as applied to the 777 with an emphasis on the modelgeneration process. It identifies the subtleties of developing a modelwith the appropriate level of resolution. A model that is too generalwill not provide the required accuracy while a model that is toodetailed will be burdensome to develop and maintain. The fact that dataentry activities for parts of the model needed to start before the modelwas completely specified was the source of additional difficulties thatthe process had to overcome. The paper presents how these problems weresolved on the 777 and how this experience can be beneficial in futureprograms