| More Electric Aircraft (MEA) is a feature of advanced fight plane. It is important to study Electric Load Manage Center (ELMC), which is the key unit of MEA.The latest development of ELMC, which is composed of Distribution Power Center Unit (DPCU) and Electrical Remote Terminal (ERT), is generalized in the paper. ELMC scheme is presented according to the characteristic of avionics and the request of Fault Tolerant Electrical Power System (FTEP). FTEP structure based on 270V direct current is then designed to realize the demonstration of DPCU.Applying the layout of improved ERT with single channel, ERT is designed as an embedded real-time multitask system basing on PC104 and μC/OS-Ⅱ in the paper. Meanwhile, according to the process of real-time multitask design, Data Flow Diagram (DFD) of ERT software is constructed and application software is developed by the DFD. The method of ERT software development is Structure Programming (SP). In software development, distribution, priority, task flow chart design, parallel schedule of tasks are discussed in detail.Finally, ELMC model is finished and tested with Power System Processor (PSP), Solid State Power Controller (SSPC), and servo system. Experiment proves that ELMC can fulfill planned function perfectly. |
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