Design And Realization Of Information Sharing System Based On Reflective Memory Network

With the rapid development of information technology, the integrated navigation system(INS) is also upgrading. INS is the core system on warcraft. The application of communication network technology tend to be more and more complex. In order to improve its real-time performance and reliability of INS, a single mode of network communication is not suitable for INS.Using the reflective memory real-time network as the core system,and combining with the serial port communication technology,a multiple network information sharing system based on the reflective memory network is formated.Due to the message of navigation sensors is short, using the serial port communication technology to receive messages. Navigation information gets the higher precision through the integrated processing and data fusion.Then the information machine and reflective memory is connected in the network, so the reflective memory network can share the navigation information. The real-time communication has been completed efficiently between internal nodes in the navigation system.Firstly, the development situation of INS communication system is analysed. The idea is to build a platform in the INS to share the information. Applications on previous reflective memory network were analyzed. The real-time property and reliability are enhanced by transplanting the reflective memory network to INS. And the characteristics of reflective memory network, a serial port are introduced.Secondly, INS sharing system is designed totality. The VxWorks embedded system supports the multitasking software structure. Navigation information has its own characteristics. According to their own characteristics of the navigation information, the application software structure of multitasking is designed. It divides the task into different priority and gives full play to the performance of the system. It avoides to drag on the processing speed of the whole system because of certain information slow processing. At the same time it reduces the difficulty of software design,and meets the needs of the development of the modern INS.Thirdly, the physical topology of reflective memory network is introduced. Using the VxWorks embedded system to develop program of reflective memory network to share information. Carrying on the detailed application development in order to send and receive data information through the serial port card and network.Finally, including the reflective memory network, the serial port,hardware-in-the-loop environment is built to simulate the INS. The network communication is tested for real-time and reliability. Using tilcon for reflective memory network to design a sending and receiving test interface to make the results more intuitive?...