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Storage reliability evaluation method of single relay based on process and reliability block diagram

A relay and reliability technology, which is applied in the field of performance analysis of relay-type stand-alone products, can solve the problems of inability to accurately evaluate the storage reliability of relay-type stand-alone machines, unable to accurately reflect the dispersion characteristics of relay-type stand-alone machines, etc., so as to improve the storage reliability evaluation accuracy, Solve the effect of low accuracy of storage reliability assessment

Inactive Publication Date: 2018-12-18
HARBIN INST OF TECH
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Problems solved by technology

[0004] In order to solve the problem of small samples in the process of evaluating the storage reliability of a single relay, it is impossible to accurately reflect the dispersion characteristics of the single relay due to the process during the degradation process, so that the storage reliability of the single relay cannot be accurately evaluated, the present invention Provides a method for evaluating the reliability of relay single-unit storage based on the combination of process and reliability block diagram

Method used

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  • Storage reliability evaluation method of single relay based on process and reliability block diagram
  • Storage reliability evaluation method of single relay based on process and reliability block diagram
  • Storage reliability evaluation method of single relay based on process and reliability block diagram

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specific Embodiment approach 1

[0027] Specific implementation mode 1: This implementation mode provides a method for evaluating the storage reliability of a relay-type stand-alone unit combined with a process and a reliability block diagram. First, the process data investigated by the manufacturer is injected into the established relay finite element simulation model, and the obtained The initial distribution characteristics of its output characteristics; then, by analyzing the actual failure mode and failure mechanism of the relay single machine, a degradation model based on failure physics is established, combined with the initial distribution characteristics of the relay and the measured data of the accelerated storage degradation test, the relay with distribution characteristics is obtained Output characteristic degradation model; finally, the failure threshold is brought into the relay output characteristic degradation model to obtain the relay storage reliability data, and bring it into the established ...

specific Embodiment approach 2

[0037] Specific implementation mode two: In this implementation mode, a certain type of relay class stand-alone is used as an object to carry out storage reliability evaluation combined with process and reliability block diagram, such as figure 1 As shown, the specific steps are as follows:

[0038] Step 1: According to the survey results and functional analysis of the manufacturer, the failure mode of a certain type of relay is mainly due to the out-of-tolerance time. Since the relay type stand-alone is mainly composed of various types of relays, its disconnection time is directly determined by the release time of each type of relay, and the release time is determined by the reaction force of the relay. The reaction force of the relay is provided by the reed. As an elastic element, the reed will experience stress relaxation during storage, and the reaction force provided by the reed will decrease, which will lead to an increase in the release time of the relay. In the study of...

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Abstract

The invention discloses a storage reliability evaluation method of a single relay based on a process and a reliability block diagram. The method injects the process data investigated by a manufacturerinto a finite element simulation model of the relay and obtains the initial distribution characteristics of the output characteristics. By analyzing the actual failure mode and failure mechanism of single relay, the degradation model based on failure physics is established. According to the measured data of relay initial distribution characteristics and accelerated storage degradation test, the degradation model of relay output characteristics with distribution characteristics is obtained. The failure threshold is introduced into the output characteristic degradation model of relay, and the storage reliability data of relay is obtained, which is brought into the single-unit storage reliability diagram of relay to evaluate the single-unit storage reliability of relay. The invention solvesthe problem of low accuracy of storage reliability evaluation of a relay type single machine under the problem of small sample.

Description

technical field [0001] The invention belongs to the technical field of performance analysis of single-unit relay products, and relates to a storage reliability evaluation method for a single-unit relay, in particular to a storage reliability evaluation method for a single-unit relay combined with a process and a reliability block diagram. Background technique [0002] For missiles, launch vehicles, space shuttles and other products, it has the characteristics of "long-term storage, one-time use". During the long-term storage of the above products, they are affected by temperature, humidity, vibration, salt spray, etc. in the storage environment, resulting in varying degrees of degradation in their output characteristic parameters. If the specified function is completed within the requirements, it will become invalid. At the same time, because the products that have been in storage for a long time are usually components, stand-alone machines, systems, etc. that need to be us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23G06F2119/04
Inventor 叶雪荣林义刚郑博恺司爽翟国富
Owner HARBIN INST OF TECH
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