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The failure mechanism of modern product has been becoming more complicated. Many highly reliable products usually have complex structure and many functions. They may have two or more performance characteristics. All the performance characteristics can reflect the product's performance degradation over time. What's more, the degradations of performance characteristics may be dependent. Therefore, it...
This paper applies the constant vibration stress accelerated degradation tests to study the effects of random vibration on the parameters stability of quartz flexible accelerometer. Two stress levels of the accelerated degradation test (ADT) are conducted where random vibration spectrum is experienced by accelerometers in the transportation. Then two-step analysis method based on the pseudo life is...
Based on the storage stability analyzing process for the accelerometer, this paper has achieved the integration of Finite Element Analysis (FEA), approximate modeling, storage stability analysis and database management in the storage stability analyzing software. By packaging the ANSYS Parametric Design Language (APDL) and enabling the MATLAB engine, this software has achieved the redevelopment of...
The degradation mechanisms and causes of performance parameters of quartz flexible accelerometer were analyzed in this paper, and the table of accelerometers' parametric degradation mechanisms and reason analysis (PDMRA) was made. On the basis of PDMRA, the weak links of accelerometers were analyzed, and the influence of varying external environment stress with time on accelerometers was studied,...
The manufactured quartz flexible accelerometer has the serious problem of bad parametric repeatability. To solve this issue, this paper does systematic research about the accelerated stability test method to improve the long-term repeatability of the accelerometer from the product hierarchy. Proceeding from the analysis of the accelerometer's internal stress mechanism, it makes a positioning analysis...
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