Highly accelerated stress test method of angular displacement sensor

A technology of angular displacement sensor and high accelerated stress, which is applied in the reliability test of devices and the field of reliability test of angular displacement sensor, and can solve the problems of short holding time, insufficient exposure of hidden dangers of angular displacement sensor failure, and low temperature change rate. , to achieve the effect of shortening the time

Active Publication Date: 2015-06-10
FLIGHT AUTOMATIC CONTROL RES INST
5 Cites 5 Cited by

AI-Extracted Technical Summary

Problems solved by technology

Therefore, there are problems such as narrow temperature range, low temperature change rate, short holding time at the working limit temperature, and the use of single-axis random vibration, which leads to insufficient exposure of the hidden danger of angul...
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Method used

By the implementation of a certain type of angular displacement sensor high accelerated stress test, temperature stress low temperature working limit is widened to-90 ℃ by design-given-55 ℃, and high-temperature work limit is widened to 135 ℃ by design-given 70 ℃ , the temperature change rate is increased from 10°C/min to 40°C/min, and the vibration excited by three-axis six degrees of freedom is used, which not only improves the efficiency of the test method to stimulate the fault, but also gradually increases the stress throug...
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Abstract

The invention relates to the reliability test technology of an angular displacement sensor, in particular to a highly accelerated stress test method of an angular displacement sensor. The method is characterized in that high-temperature working limit and low-temperature working limit are determined through high-temperature and low-temperature stepping assessment, vibration working limit is determined through vibration stepping assessment, and the high-temperature working limit, the low-temperature working limit and the vibration working limit provide reliability assessment to the design parameters of the angular displacement sensor; the temperature lower limit in the test is lowered from -45 DEG C to -90 DEG C, the temperature upper limit is increased from 70 DEG C to 135 DEG C, temperature change rate is increased from 10 DEG C/min to 40 DEG C/min, vibration load is changed from single axis to three-axial-direction six-freedom-degree excitation, reliability assessment requirements of the angular displacement sensor are increased, time of the reliability test can be reduced correspondingly, and a new approach is provided to the reliability test method of highly accelerated stress.

Application Domain

Instruments

Technology Topic

PhysicsLower limit +5

Examples

  • Experimental program(1)

Example Embodiment

[0022] Examples:
[0023] Through the implementation of a certain type of angular displacement sensor high acceleration stress test, the temperature stress low temperature working limit is widened from -55℃ given by design to -90℃, and the high temperature working limit is widened from 70℃ given by design to 135℃, and the temperature changes. The rate is increased from 10°C/min to 40°C/min, and vibration excited by three-axis six degrees of freedom is used, which not only improves the efficiency of the test method to stimulate failure, but also gradually increases the stress by stepping stress to avoid the product Directly increase the damage caused by stress. A total of 10 potential defects were exposed in the test, which covered all the failure modes that occurred in the actual application of this type of product; the improved product's low-temperature working limit was increased by 35℃, the high-temperature working limit was increased by 65℃, and the reliability test time was shortened from 452.6 hours to 85 Hours, it provides a new way to strengthen the accelerated reliability test method.

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Description & Claims & Application Information

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