Reliability and maintainability design of charger

　　Reliability and maintainability design of charger

　　1 Reliability model The reliability model is a block diagram and mathematical model established to predict or estimate the reliability of a product.

　　2 Reliability block diagram Reliability block diagram For one or more functional modes of a complex product, the failure of each component represented by a box or a logical diagram of how their combination causes product failure.

　　3 Reliability allocation reliability allocation (apportionment) In order to allocate the reliability quantitative requirements of the product to each component according to the given criteria.

　　4 Reliability prediction reliability prediction The work performed to estimate the reliability of a product under given working conditions. The estimation should take into account factors such as the reliability, design level, process conditions and system coordination of each component of the product.

　　5 Reliability stress model rdliability stress model A mathematical model used to describe the influence of associated stress on product reliability or other properties.

　　6 Maintainability model maintainability model A block diagram and mathematical model established for predicting or estimating the maintainability of a product.

　　7 maintainability allocation maintainability allocation (apportionment) In order to allocate the quantitative requirements of product maintainability to each component in accordance with the given criteria.

　　8 Maintainability prediction The work performed in order to estimate the maintainability of a product under given working conditions.

　　9 Derating Derating is lower than the rated stress or reduces a certain stress in exchange for increasing another stress to use a product.

　　10 Redundancy Use more than one way to complete a prescribed function.

　　11 Working redundancy active redundancy All redundancy is in working state at the same time.

　　12 Standby redundancy standby redundancy Only when the original working redundancy fails, the replacement redundancy starts to work.

　　13 Failure mode and effect analysis (FMEA) An analysis that analyzes each potential failure mode in the product and determines its impact on the product, and classifies each potential failure mode according to its severity. technology.

　　14 Fault tree fault tree A logic diagram used to indicate which component failure modes or external events or their combination will cause a given failure mode of the product.

　　15 Fault tree analysis (FTA) Draw a fault tree by analyzing the hardware, software, environment, and human factors that may cause product failures to determine various possible combinations of product failure causes and/or their occurrence An analysis technique of probability.

　　16 Maintenance tree maintenance tree A logical diagram of the basic maintenance operation sequence and selection of various sequence conditions for a product that needs to be repaired.

　　17 Sneak circuit analysis sneak circuit analysis is an analysis technique that determines potential pathways that can inhibit normal functions or induce abnormal functions under the condition that all components of the product are working normally.

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