Quantitative Control Method of Space Radiation Environment Reliability Based on Failure Rate

Abstract

The invention relates to the technical field of the space radiation environment reliability of an electronic system, in particular to a failure rate based quantitative control method for the space radiation environment reliability. The method comprises the steps as follows: S1, an index request lambda SRE of the space radiation environment reliability is obtained through calculation; S2, a predicted value lambda' SRE of the space radiation environment reliability is obtained through calculation; S3, if the predicted value does not meet the index request, an achieved quantitative protection failure rate delta lambda SRE is obtained according to a calculation formula: delta lambda SRE is equal to a difference obtained by subtracting the lambda SRE from the lambda' SRE; and S4, according to the calculation formula of the quantitative protection failure rate delta lambda SRE, a protection measure parameter is regulated until the predicted value of the reliability meets the index request of the space radiation environment reliability. According to the invention, the radiation environment reliability of the aviation / spaceflight electronic system is conveniently combined into a traditional reliability management system; the reliability index request, the anti-radiation capacity prediction value and the quantitative protection measure can be determined at the preliminary stage of task design, so that cost saving is facilitated; and further, scientific and credible index preparation, reliability prediction and protection design effect calculation are guaranteed, and engineering design guidance is facilitated.

Description

technical field [0001] The invention relates to the field of reliability prevention of space radiation environment, in particular to a method for quantitative control of reliability of space radiation environment based on failure rate. Background technique [0002] Under the influence of the space environment of the space mission orbit, the aviation / aerospace system will induce four kinds of damage effects: charge-discharge effect, single event effect, total dose effect, and displacement damage effect in the aviation / aerospace system, resulting in the failure of the aviation / aerospace system. However, at present, there is no space radiation reliability index requirement λ associated with the failure rate λ of the traditional reliability index in China SRE . Therefore, only by establishing a set of space radiation reliability algorithm system based on the failure rate λ can the space radiation environment be included in the traditional reliability design, production, test, a...

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Problems solved by technology

[0003] At present, the ability to evaluate the anti-radiation effect of a device is expressed by the intrinsic failure characteristic parameters. For example, the ability to evaluate the anti-total dose effect of a device is characterized by the amount of resistance to the metering, and the ability of a device to resist the single event effect is characterized by the threshold-level cross-section. Characterization, these intrinsic failure characteristic parameters are not related to the failure rate λ of the system reliability index parameter, the distribution and accurate prediction of traditional system reliability do not include the influence of space radiation effects, and the lack of single event effects and total dose effects in space application engineering , displacement damage effects and other related reliability indicators, leading to the fact that the current satellite system reliability management does not really evaluate the risk of space radiation effects

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