Research On Fault-tolerant Technology In On-board Information Processing Platform

The science and technology progress in the world promotes the development of satellite technology research.Small satellite has many advantages,such as small size, light weight,and good flexibility,and it has become a research focus in the field of satellite.On-board information processing platform is the information processing core in a small satellite,and the special space environment requires a high reliability performance.This makes reliability design of the on-board information processing platform become one of the world research focuses in the field of aerospace technology.This paper presented a fault-tolerant architecture for on-board information processing platform.Firstly,information processing platform system-level dual computer fault-tolerance architecture and single-system architecture were introduced. Subsequently,according to the function module partition,the processor module,the control module,the power module,the memory module and the interface module in the information processing platform were studied separately using module-level fault-tolerant technology,including the basic design of processor module,the choice for the fault-tolerant design scheme of control module resistant single event effect,the power modules over-current protection technology,the memory module redundancy technique and the structural design for the interface module.The applications of module-level fault-tolerant technology and system-level dual computer fault-tolerance technology promote the reliability performance of on-board information processing platform.Based on single-system fault-tolerant design,this paper focused on on-board information processing platform dual computer fault-tolerant technology.Applying the single-system fault-tolerant technology to system-level dual computer fault-tolerant technology could further improve the reliability of the system.This article had analyzed the hardware and software of dual computer fault-tolerant system,and mainly studied dual computer Control Mechanism with Field Programmable Gate Array(FPGA) device at the core in dual computer fault-tolerant system.By the performance test of various properties,the validity of dual computer fault-tolerance system design was verified.This paper also introduced fault-tolerant design of Controller Area Network(CAN) Bus into on-board information processing platform,and studied the reliability design scheme of double-CAN redundancy from two aspects of hardware and software, combining the architecture of information processing platform.Introducing CAN bus greatly improved the transmission performance of communications and data.And the CAN bus double redundancy design further improved the reliability of the communication interface. In the last part,the paper realized the prototype system of on-board information processing platform,and tested and verified this system.The test results showed that the platform was characterized by perfect functions,excellent performance,and structural reliability.The prototype system could be applied in practice in the on-board equipments,with the improvement of to the space-level devices.