Data Commission System Of Microsatellite Position Control Based On FlexRay Bus

The internal communication bus in microsatellite is an important channel of data communication and command transmission between each load unit in the satellite. The performance of the bus directly affects the mission execution efficiency of the satellite`s load units. The CAN Bus and 1553 B Bus, which are commonly used at present, have a good reliability after years of application. But the transmission characteristics of events triggering and the low data transmission speed of these buses are not enough to meet the requirements of modern microsatellite internal bus. Therefore, how to find a faster bus with more stable transmission characteristics is more important. This project developed the Flex Ray bus technology, combined with actual satellite load demand, in high-end automobile industry to the microsatellite in aerospace industry. The research contents of this paper are as follows:1. Flex Ray Bus technology is researched and investigated combined with the actual satellite internal communication bus demand and the application situation of the bus technology in the satellite system is set.2. This paper develops MCU, CC and BD modules as communication control units in Flex Ray Agreement, it also designs the peripheral hardware circuit of Flex Ray communication module. This paper shall study performances of Flex Ray Bus though various topological structures and transmission mechanisms, including the communication among the nodes and communication mechanism design among cluster network. And it carries out long-paying test and reliability test on transmission performance of the bus.3. With the communication function of Flex Ray, system realizes multiple Flex Ray slavenodes of simulation satellite sensor unit, and verifies that this system can operate theattitude control method of microsatellite normally.