Transported The X-aircraft Power Supply System Processor Design

Y-X uses the mixed power distribution system which is based on the technology of Electrical Multiplexer(EMUX). In the power distribution system, we use distributed control technology and management strategy of centralization. The Power System Processor(PSP) receives the control information transmitted by avionic system and sends the electrical load control command to the relevant terminals. At the same, the PSP acquires the terminals' status and transmits the specific information to avionic system.In this thesis, the function of PSP has been modularized. Among all the modules, the load control and management module, communication module and database management module are especially designed. The time sequence of the 1553B bus and the contents transmitted at every minor frame are specified, and the bus load is also analyzed. In the fifth charter, the development process of board support software is introduced. The structure design and storage mechanism of the real-time memory database are introduced. And then, considering the system complexity, real-time performance and reliability, the real-time UML is used to create the model of application software, including the use case model and state model. The real time tasks of PSP are specified based on the software model and the Rate-Monotonic Scheduling (RMS) is used to schedule the run of tasks.