Reliability qualification test method combining internal and external fields applicable to electromechanical products

A technology for electromechanical products and identification tests, applied in the direction of measuring devices, instruments, etc., can solve the problems of unstable assembly process, unreliable test, large external dimensions, etc., and achieve the effect of ensuring the adequacy of the test

Inactive Publication Date: 2020-01-10
湖南苏试广博检测技术有限公司
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AI Technical Summary

Problems solved by technology

[0004] For some complex mechanical and electrical equipment, the external dimensions are relatively large, and the conditions for comprehensive environmental stress tests are not available in China at present, and the reliability appraisal test for the entire system cannot be carried out. The reliability test of the whole system cannot be carried out, and many problems will be exposed in the later use, such as design defects, unstable assembly process, etc. Therefore, the reliability test problems of electromechanical products need to be solved; through the novelty check of existing technologies, At home and abroad, there is no reliability appraisal test method combining internal and external fields for electromechanical products

Method used

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  • Reliability qualification test method combining internal and external fields applicable to electromechanical products
  • Reliability qualification test method combining internal and external fields applicable to electromechanical products
  • Reliability qualification test method combining internal and external fields applicable to electromechanical products

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specific Embodiment approach 1

[0043] Combine below Figure 1-8 Describe this embodiment, a method of reliability appraisal test suitable for the combination of internal and external fields of electromechanical products, including the following steps:

[0044] Step 1: Analyze the test product

[0045] This method is applicable to mechanical and electrical products that cannot be placed in the temperature-humidity-vibration three-integrated test chamber due to their large size, and can be split into mechanical parts, actuators and control systems according to design requirements.

[0046] Step 2: Determine the test plan;

[0047] According to the analysis of step 1, the environmental test conditions are determined, and the reliability appraisal test method combining internal and external fields is adopted. The external field test is a bench test under natural environmental conditions, and the test object is electromechanical products. It mainly evaluates electromechanical products in specific use environmen...

specific Embodiment approach 2

[0070] Combine below Figure 1-8 Describe this embodiment, and describe a reliability appraisal test method suitable for the combination of internal and external fields of electromechanical products;

[0071] Step 1: Analyze the test product;

[0072] For example, the ship steering control device is selected for the test. The ship steering control device mainly includes three parts: the mechanical part, the actuator and the electric control part. The ship steering control device is a typical electromechanical product, so it is considered that its reliability index approximately obeys the exponential distribution. Reliability identification test can be based on

[0073] GJB899A-2009 requirements for testing.

[0074] Step 2: Determine the test plan

[0075] The size of the ship steering control device is too large to carry out the reliability appraisal test of the infield test for the whole system. Therefore, according to the characteristics of the system, the ship steering...

specific Embodiment approach 3

[0095] Combine below Figure 1-8 Describe this embodiment, and describe a reliability appraisal test method suitable for the combination of internal and external fields of electromechanical products;

[0096] The field test is a reliability test for the entire system of the ship's steering control device, and its test profile is formulated according to the life profile and task profile.

[0097] The statistical scheme of the system reliability appraisal test adopts the short-term high-risk timing censored test scheme 21 recommended in GJB899, that is, the total time for the system to carry out field tests is: T=1.1θ 1 = 3300h.

[0098] Determining the field test stress

[0099] The field test stress is mainly to simulate the events experienced in the working cycle of the equipment under test, and is formulated according to the life profile and task profile of the equipment under test, specifically as figure 2 as shown, figure 2 One cycle test time is 400 hours, and this ...

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Abstract

The invention relates to the technical field of reliability testing, and more specifically relates to a reliability qualification test method combining internal and external fields applicable to electromechanical products. An electromechanical product is divided into a mechanical part, an actuator and a control system, the mechanical part, the actuator and the control system are checked by using atest method in which an external field experiment is combined with an internal field experiment, a reliability qualification test method combining internal and external fields is provided, the large-size electromechanical equipment is divided into the mechanical part, the actuator and the control system in the method, events experienced in a working period are simulated according to a service life section and a task section of a tested product, working stress is formulated to assess the reliability of the mechanical part, combined stress of humidity, humidity and vibration is applied to the control system that is insufficiently evaluated in the external field experiment according to GJB1989A-2009, and a laboratory test manner is further supplemented and implemented to perform a supplementary test on the environmental stress thereof, so that the adequacy of the test and the integrity of the test data are ensured.

Description

technical field [0001] The invention relates to the technical field of reliability testing, in particular to a reliability identification testing method suitable for the combination of internal and external fields of electromechanical products. Background technique [0002] The main purpose of the reliability identification test is to verify whether the product meets the specified reliability requirements, to discover and improve the reliability defects of the product as much as possible, and to provide supporting information for product improvement, modification or new product development. GJB450A-2004 stipulates that for newly designed products or products that have undergone major improvements, reliability appraisal tests should be carried out in accordance with the requirements and methods specified in GJB 899A-2009 or other relevant standards. [0003] Reliability identification test is a kind of statistical test. Its working principle is based on a certain assumption o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D21/02
CPCG01D21/02
Inventor 李芳芳任志乾余琼吴辉
Owner 湖南苏试广博检测技术有限公司
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