Self-refreshing tripping system for spaceborne computer

A space-borne computer, self-refresh technology, applied in the field of satellite on-board electronics

Active Publication Date: 2014-12-17
AEROSPACE DONGFANGHONG DEV LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional switch-off design can functionally realize automatic switch-off under failure, but it ignores the risk of single-event upset in the arbitration circuit itself. Abnormal occurrences such as abnormal machine cutting and other abnormal results

Method used

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  • Self-refreshing tripping system for spaceborne computer
  • Self-refreshing tripping system for spaceborne computer

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0016] as attached figure 1 As shown, the small processor system of the on-board computer self-refresh switch system of the present invention includes a central processing unit CPU, a static random access memory SRAM, a watchdog circuit, a processing logic circuit and a non-volatile flash memory NorFlash. The on-board computer adopts a dual-machine cold backup mechanism, and the single machine takes the processor as the core, stores the program in Norflash, and runs it in SRAM. In order to prevent faults caused by single-event flipping damage to the execution program, four copies of the program are stored in Norflash, and each reset will automatically switch addresses to find the next program to run, and the four copies of the program are stored in a ring. With the above operations, the fault can be eliminated as much as possible through syst...

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PUM

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Abstract

The invention provides a self-refreshing tripping system for a spaceborne computer. The single-particle resistance of an arbitration circuit is improved by adopting a self-refreshing design, a system reset program is adopted for independent switching to reduce stripping frequency, and the defects that the traditional tripping system is small in single-particle protection and trips frequently are overcome. As an FPGA (field programmable gate array) in an SRAM (static random access memory) process is sensitive in a spatial environment to easily cause single-particle events and a high-level anti-fuse FPGA is high in price and is not easy to purchase, the FPGA is not used, a concise digital circuit is adopted, equipment cost is controlled, the reliability is improved, and the system has the characteristics of affordable price and high reliability.

Description

technical field [0001] The invention belongs to the technical field of satellite electronics, and in particular relates to a self-refreshing cutting machine system for a satellite-borne computer. Background technique [0002] The on-board computer is the core component of the electronic system on the satellite. It is usually responsible for the management and control tasks of the entire satellite, and its reliability directly affects the reliability of the entire satellite. The operation of a large number of satellites in orbit shows that due to the influence of the space environment, even if a series of anti-radiation measures are taken, the on-board computer system will inevitably have logic anomalies or failures due to space environment factors. Safe and reliable, the on-board computer usually adopts the dual-machine backup mode of the main machine and the standby machine. [0003] Resetting the onboard computer system can eliminate sudden recoverable failures to a certa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/16
Inventor 蒲卫华
Owner AEROSPACE DONGFANGHONG DEV LTD
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