Design of a Minimal OSA-CBM Model for an Aircraft Generator

The OSA-CBM standard defines the specification of CBM-related data model and application interface. However, implementing the standard is not a trivial task. Very little information of how to build an OSA-CBM system is available in the literature. The main objective of this work is to provide an implementation example of the OSA-CBM standard. This paper describes a structure model needed for a minimal implementation of an OSA-CBM module. The model consists of four software components - a module block, data processing blocks, OSA-CBM data objects and Service objects. In this framework, a Publish/Subscribe model is chosen as a primary communication mode. The flow of data in the CBM process can be naturally facilitated with this model of communication. In this study, the dynamic aspect of block objects is modeled using statecharts. These asynchronous behaviours determine how block objects interact to form a working a OSA-CBM module. In this study, an aircraft generator system is used as a design example. We demonstrate how to map a generator CBM process to the OSA-CBM abstract functional layers, and also how OSA-CBM modules can be constructed based on the proposed minimal software model.