Research On High Reliable And Fast Interaction Technology Of Satellite Dual Computer Information

Satellites are playing an increasingly important role in national defense military,scientific research and national economy.As the data management and control core of the whole satellite,the satellite service subsystem generally adopts dual computer backup to improve reliability.However,for the traditional dual computer cold backup system,the fault judgement is achieved through the coupling of software and hardware,which has a risk that the satellite will be out of control for a long time when the dual computer switches.This topic studies a new type of dual computer interaction technology,which can achieve dual computer switching more quickly,concisely and reliably,and further improve the security and reliability of satellites.The main contributions of this paper are as follows:1.We have studied a faster and more reliable satellite dual computer cold backup machine switching technology,which eliminates the need to determine the primary and backup machines through reliable hardware switching.The hardware completes system fault monitoring and powers up the backup machine.After any single machine is powered up by the watchdog module,it immediately runs the local system without waiting to shut down the other machine,enabling the satellite subsystem to resume normal operation.The software judgment process has been optimized.The software not only avoids judging the primary and standby computers,but also does not need to determine whether the satellite service subsystem is operating normally.Therefore,there is no need to set a waiting time.Just run the local computer normally and power off the other computer,which can quickly,concisely,and reliably achieve dual computer switching,enabling the satellite to resume normal operation,improving the reliability of the satellite.2.The hardware implementation of the fast and reliable dual computer backup system was carried out,and a computer product was developed.The interior of the satellite service subsystem adopts a software and hardware integrated collaborative design method.The hardware is the satellite service computer,providing a reliable operating platform for satellite service management,on which the satellite service software and FPGA are running.According to the mission requirements of a satellite under research,the hardware design of the satellite service subsystem was completed,focusing on the core memory design,watchdog design,and dual computer switching design.According to the design,the hardware implementation was carried out,and a computer product was put into production and developed.3.Reliability evaluation has been completed for this fast and reliable dual computer backup system.A complete test system is designed to verify the reliability of the new technology.We use the component stress analysis method to evaluate the reliability of the satellite service computer.Relying on the existing satellite ground test equipment,a complete test system consisting of the power supply subsystem,the communication subsystem,the satellite service subsystem and the ground system was built,and the reliability of the system was experimentally verified.Both reliability evaluation and experimental results indicate that the new dual computer interaction technology studied in this topic can effectively reduce the time of dual computer switching,achieve high reliability and fast interaction of satellite dual computer information,improve the security and reliability of satellites,and thereby improve the service quality of satellite applications.