Design Of House-keeping Simulation System Base On 1553B Bus

A payload created by CIOMP communicates with satellite through 1553 B bus, a new communication protocol“1 second to 10 frames, 1 frame to 10 messages” for 1553 B bus is used, but the house-keeping simulation system which we have now can only match the model of “1second 1 message”. To realize the simulation of “frame message model”, the house-keeping simulation system which can not only match the “frame message model”, but can shorten the delay time of 1553 B command executed by 1553 B board to under 5 ms. Firstly, the framework of Windows+Vx Works is used and GPS second pulse board is added to the Vx Works computer as the time source of this system, secondly, high-precision time acquisition module and1553 B board control module are designed to Vx Works software, thirdly, 1553 B Message edit module and Second commands edit module are designed in the windows software, finally, a new house-keeping system base on1553 B bus is design.In this thesis, the research result and innovations include the following aspects:1) Universality, one simulation test software for 1553 B bus is designed in this thesis, which meets that users can define the message bit and test instance. 2) Real-time, the executing time of 1553 B board is only delayed 3 ms at most compared with the ideal time, which is more than 6.5 times better than the delay time of the system of “1 second 1message” whose delay time is 20 ms. 3) Real-time monitoring and historical replay, the board stores the time data and message data when send or receive data,which ensures that test process is controlled in time. The monitoring computer monitors the test process, alarms the abnormality and replay the historical data to provide the data support for debugging. 4) Prospective, the system meets the module of “1second 1000message”, which can not only cover the module of “1second 10 frames, 1 frame 10 messages”, but meet the requirement of new type in the future.The experiment results show that:this system can not only match the “frame message model”, but can shorten the delay time of 1553 B command executed by 1553 B board to under 3 ms compared with the ideal time, which is more than 6.5 times better than the delay time of the system of “1 second 1message” whose delay time is 20 ms. This system provides accurate time support for debugging.