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Design and Evaluation of High Reliability Dual Redundant On-Board Computer System

Author: JiaWenTao
Tutor: ZhangChunYuan
School: National University of Defense Science and Technology
Course: Computer Science and Technology
Keywords: Two - machine backup technology Onboard computer Fault-tolerant technology Fault injection technology
CLC: TP309.3
Type: Master's thesis
Year: 2010
Downloads: 83
Quote: 1
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Abstract


Board computer system as the core transaction processing and control of satellites , reliability and performance directly determines the ability of satellites transaction processing . With the rapid progress of aerospace technology , more and more stringent requirements for the reliability and performance of the on -board computer system , the development of highly reliable , high-performance on-board computer system to become a challenge that must be met . Dual machine backup technology is currently the most common board computer system fault-tolerant technology , in particular, is widely used in satellite temperature backup and hot backup . In this paper, the shortcomings of traditional backup , designed to distinguish host and preparedness run double machine backup . Compared with traditional backup this way : 1 , dual system run case , the host processing focus on Star Service focuses on the backup machine fault detection and handling ; 2 backup machine failure since inspection to reduce for backup machine failures and result inconsistent with the results ; than inconsistent first fault type of discrimination , if it is a transient failure only need to restore the system ; hardware watchdog Star Service program control flow detection , comprehensive monitoring of results and control the flow of the Star Service program . Run against proposed distinction backup paper completed the Design and Implementation of spaceborne dual backup system , and developed a prototype system . Star transaction processing spaceborne dual backup prototype system correctly, stable operation . Accurate assessment of spaceborne dual backup system fault tolerance effect , the prototype system , hardware fault injection test . Characteristics based on of spaceborne dual backup system fault propagation and occurrence of SEU design realistic fault injection on trial ; implemented fault injection test to the EDAC fault-tolerant SRAM and FLASH using TMR fault-tolerant ; on the test data were analyzed to assess the actual fault tolerance effect EDAC, TMR and dual machine backup technology . The tests showed that the onboard dual backup system designed in this paper has a strong fault tolerance , can greatly improve the reliability and performance of the system .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > General issues > Security and confidentiality > Data backup and recovery
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