Research On Remote Power Distribution System Of Modern Aircraft

Modern aircraft is moving in the trend of more electric, even all electric equipment, this will inevitably increase the number of airborne electrical equipment, so the research on rational and effective aircraft remote distribution system is the key project around the world.This thesis studies the distribute aircraft power system in details, include Bus technology,solid-state power distribution technology and Bus Power Control Unit(BPCU).In hardware design of BPCU, STM32 from ST Semiconductor is adopted as the core processor. With the fast and powerful data processing ability of the STM32, the system can accomplish the management of large amount of data. The realization of CAN communication is expounded from two aspects of hardware circuit and software program; the real-time multitasks operation system μC/OS-II is applied in the software to improve system’s reliability and real-time characteristic, the application tasks are divided into different modules with different priorities. Through system service, such as semaphore, mailbox and message queue, μC/OS-II can manage all the tasks. It becomes easy for programming and has a better expandable ability.Takes the 28 V SSPC as an example, analyses the working principle of SSPC and make an introduction of the design of Direct-Current SSPC. There is state-detection circuit technology, analog-detection technology, short-circuit protection technology, inverse time-delay techniques, etc. Simulation analysis model of Direct-Current SSPC is set up in Saber software. This paper makes a simulation analysis of SSPC and verifies its function, and the results prove legitimacy of the model. Base on the simulation experiment, AC and DC SSPC is designed by power switch module, drive control and protection module, analog sampling module and so on.Finally, the simulation components RPDU, CBIC and RDC are designed, they can communicate with each other by CAN Bus technology.