A batch hard disk accelerated degradation test method and device under vibration environment

Abstract

The invention relates to the field of hard disk reliability testing, in particular to a method and device for testing batch hard disk accelerated degradation in a vibration environment, which comprises three parts: formulating a hard disk performance degradation data acquisition scheme, formulating a stress application scheme and designing a batch hard disk fixing device. A cluster real-time synchronous data acquisition mode is adopted, and the working performance of the hard disk is not affected; based on the wear degradation mechanism of a head disk, a vibration-induced hard disk accelerateddegradation method is proposed; a modal test and an accelerated degradation test are performed on the hard disk, and then the vibration start and stop frequency and the amplitude magnitude are determined, and the stress application scheme is obtained; the stacked hard disk fixing device can meet the requirements of the batch hard disk test, and can ensure that the test hard disks are stimulated identically. Therefore, the method and device can realize rapid degradation of the batch hard disks, can significantly reduce the accelerated life time of the batch hard disks, can reduce the test cost, can shorten the development cycle, and thus has high promotion value.

Description

technical field [0001] The invention relates to the field of hard disk reliability testing, in particular to a batch hard disk accelerated degradation test method and device in a vibration environment. Background technique [0002] Accelerated Life Test (ALT) is the only way to evaluate whether a product meets the requirements of high reliability and long life. There are three different methods of accelerated life testing: one is to increase the frequency of use of the tested product under normal working conditions; the other is to place the tested product under conditions that are more severe than normal conditions; A degradation mechanism such as wear of mechanical parts applies accelerated stress, which is the accelerated degradation test (ADT). [0003] In the field of hard disk reliability testing, traditional methods for high reliability and long-life products such as hard disks are difficult to obtain sufficient failure data even through accelerated life tests within...

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Problems solved by technology

[0003] In the field of hard disk reliability testing, traditional methods for high reliability and long-life products such as hard disks are difficult to obtain sufficient failure data even through accelerated life tests within a limited time; in addition, traditional methods have fundamental problems in information utilization. It is difficult to use the information about the product failure process in the test process; although the traditional accelerated life test based on failure time performs well under the condition of large samples, it has the characteristics of "multiple varieties, small batches, and rapid production" in modern industrial production In this case, it is difficult to solve the problem of small samples; moreover, most of the existing hard disk accelerated life tests are carried out for a certain part of the hard disk, and there is no accelerated degradation test for the overall performance of the hard disk.

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