雙機(jī)熱備份綜合導(dǎo)航顯控裝置的設(shè)計(jì)與實(shí)現(xiàn)
[Abstract]:With the upgrading of the navigation system, the reliability of the existing integrated navigation display and control device is required to prevent the navigation data from being transmitted to the external system due to the failure of the integrated navigation display and control device. This paper improves the reliability of the existing integrated navigation display and control device by using the dual computer hot backup technology to meet the practical needs. The dual computer hot backup technology is one of the fault-tolerant technologies. It adopts the same hardware structure of the two computers, the backup module works synchronously with the main module, and it is ready to replace the main module at any time. China has designed fault-tolerant equipment, but there is still a certain gap compared with the international level. Based on the analysis of the existing dual computer fault tolerant technology, this paper summarizes the characteristics of the dual computer hot backup system, and puts forward the requirement of the redundant management system which is developed independently by the application software. At the same time, the interface function of the redundancy management system is analyzed, and three general structures of the dual computer hot backup application software system designed by the redundancy management system are presented. The advantage of the dual-machine parallel system is that it is easy to find the relative fault through the comparison of the two computers, and the software fault can be fault-tolerant through the development of the N-version technology. The software structure of the two-machine parallel mode has the smallest change to the software structure of the existing system. Even if both computers adopt the same software structure, it can also form a dual-machine hot backup system. Once the second version of the software is successfully developed in the future, It can be put into the dual computer system immediately to realize the common use of the new and old versions of the program, can reduce the potential failure of the new version of the system without comprehensive testing, which is very suitable for the development of this subject. Therefore, in the final implementation, this paper also adopts the hot backup structure of two-machine parallel mode. The redundancy management system designed in this paper is used to realize the function of dual computer hot backup. It can be used repeatedly for the same type of hot backup system, and can also be developed according to the needs of specific projects. The redundancy management system has been extended to make the scope of application more extensive. In the design of redundancy management system, this subject considers the universality of the platform, as long as in the VxWorks5.5 embedded real-time operating system, all hardware environments with reflective memory card can be applied. Even if the type of reflective memory card used by the user is different from that in the design, it can be used simply by modifying the hardware driver of the redundancy management system. This paper analyzes in detail some general principles of the redundancy management system combined with the application software development, and provides the guiding idea for the application of the redundancy management system in the actual project development. Based on the simplification of the existing integrated navigation display and control device, a dual-machine hot backup integrated navigation display and control device is designed. The device has the general characteristics of the existing integrated navigation device and can be used in the actual development of the equipment. Double-machine hot backup function design as a reference. Finally, the performance of the dual computer hot backup integrated navigation display and control device is tested. The performance of the dual computer system is the same as that of the single machine system, and the performance of the dual computer system is the same as that of the single machine system. Faults can be detected and shielded in one operation cycle, which significantly improves the reliability of display and control equipment.
【學(xué)位授予單位】:哈爾濱工程大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2012
【分類號(hào)】:TP302.8;TP273
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