CN111008711A - LRU screening method and device based on definition and connotation interpretation and application - Google Patents

LRU screening method and device based on definition and connotation interpretation and application Download PDF

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Publication number
CN111008711A
CN111008711A CN201910026252.4A CN201910026252A CN111008711A CN 111008711 A CN111008711 A CN 111008711A CN 201910026252 A CN201910026252 A CN 201910026252A CN 111008711 A CN111008711 A CN 111008711A
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lru
complexity
screened
product
fault rate
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耿杰
吕川
金玉雪
邱标
张琪
郑曰朝
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Beihang University
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Beijing Zhizhen Technology Co ltd
Beihang University
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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    • G06Q10/063—Operations research, analysis or management
    • G06Q10/0639—Performance analysis of employees; Performance analysis of enterprise or organisation operations

Abstract

The invention provides a LRU screening method based on definition and connotation interpretation, which relates to the field of product design and comprises the steps of analyzing the product structure and the product maintainability of LRU to be screened to obtain screening factors of failure rate factors and complexity factors in the product design stage; setting a fault rate threshold value and a complexity threshold value, respectively evaluating and calculating the fault rate and the complexity, and respectively obtaining a calculation result of a fault rate factor and an evaluation result of a complexity factor; screening and calculating the evaluation result of the fault rate factor and the evaluation result of the complexity factor, and determining whether the LRU to be screened can become the LRU; the invention solves the current situation that the LRU planning work of the product in the field lacks of normative guidance method and work guide, and has important significance for guiding the product design planning and improving the maintainability design.

Description

LRU screening method and device based on definition and connotation interpretation and application
Technical Field
The invention relates to the field of product design, in particular to an LRU (least recently used) dividing method and device based on definition and content interpretation
Background
The line replaceable unit, also known as a field replaceable unit, is defined in GJB/Z91-1997 as: the replaceable product and its components may be used in a field or battle environment.
The LRU is designed to allow a failed unit to be easily replaced in an actual use environment. When the LRU is failed or is expected to be failed, the LRU can be quickly disassembled and replaced by spare parts, so that the equipment is restored to the specified technical state, and the convenience of maintenance of the equipment in the actual use environment is improved. The LRU can save maintenance time to a great extent in the use of equipping, ensures the normal use of equipping, improves maintenance efficiency, convenience and economic nature of equipping. These advantages of LRUs are particularly important in improving equipment serviceability and reducing maintenance costs over the life cycle of the equipment. LRU is a maintenance target to be maintained at a base level, and is of great importance in the maintainability design of equipment.
In the design of the equipment, the planning work of the LRU is not sufficiently valued. LRU planning is an important component in product design and affects not only the reliability of the product, but also the performance characteristics of the product. The flow of past planning for LRU is as follows. Firstly, a preliminary replacement unit list is obtained according to the product function definition file. Meanwhile, the overall layout is designed by combining the CAD information of the product. Secondly, an LRU planning design method is applied to obtain an LRU list. And finally, comprehensively analyzing and evaluating the LRU design scheme by combining the overall layout design and RMS (Reliability, Maintainability and Supportability) design, qualitatively and quantitatively checking the influence of the system on the aspects of Reliability, Maintainability, Supportability and the like, and determining the optimal LRU design scheme. The current research on the design of the LRU plan is to evaluate and weigh the design of the LRU plan by using the RMS factor and to give design improvement suggestions. However, the problem of how to apply the LRU planning design method to obtain the LRU list lacks a normative guiding method and a working guide, and the actual work is performed by more past experience. Even some equipment is designed without taking the designer into consideration, and the primary replacement unit list obtained from the product function definition file is directly used as the LRU list, which makes the subsequent LRU evaluation more complicated. In view of the current situation that how to accurately obtain the preliminary replacement unit list in the LRU planning work lacks an applicable method, an effective LRU planning method is urgently needed.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a screening method for the LRU determined in equipment design in the product design process, the invention establishes the LRU screening criterion based on the LRU definition and the content interpretation by deeply analyzing the LRU definition and the content and considering two factors of fault rate and complexity based on the definition and the content interpretation of the LRU, realizes the judgment of whether the product can become the LRU on the basis of the criterion, solves the current situation that the LRU planning work of the product in the prior art lacks of normative guidance method and work guide, and has important significance for guiding the product design planning and improving the maintenance design.
To achieve the technical object of the present invention, in one aspect, the present invention provides a method for LRU screening based on definition and content interpretation, including:
in the product design stage, the screening factors of failure rate factors and complexity factors are obtained by analyzing the product structure and the product maintainability of the LRU to be screened;
setting a fault rate threshold value and a complexity threshold value, respectively evaluating and calculating the fault rate and the complexity, and respectively obtaining a calculation result of a fault rate factor and an evaluation result of a complexity factor;
and screening and calculating the evaluation result of the fault rate factor and the evaluation result of the complexity factor, and determining whether the LRU to be screened can be the LRU.
The product structure comprises the number and complexity of the interfaces of the LRU structure to be screened.
The product maintainability comprises the time required for maintenance and replacement of the LRU to be screened, a maintenance tool required for detection, diagnosis, replacement and calibration of the LRU to be screened and the fault rate of the LRU to be screened.
The time required for maintenance and replacement of the LRU to be screened refers to the time required for a maintenance worker to perform detection, replacement and calibration on the LRU to be screened in the actual maintenance process.
The maintenance tools for the LRU to be filtered include the types and the number of the maintenance tools used for detecting, replacing and calibrating the object, and mainly pay attention to whether special tools are needed. The constraint condition of the maintenance tool for satisfying the core meaning of the LRU of the use environment is considered in the process of determining the LRU.
The fault rate of the LRU to be filtered is an important consideration in LRU filtering, where the fault rate refers to the fault rate of the LRU to be filtered within one year.
The setting of the failure rate threshold and the complexity threshold is set by a person skilled in the art, and may also be set according to a product design criterion or a design requirement.
In particular, the analyzing of the product structure and the product maintainability of the LRU to be screened is to collect the number of interfaces and the complexity information of the LRU structure to be screened in the product structure, and to collect the time required for performing maintenance and replacement on the LRU to be screened in the product maintainability, the maintenance tool required for performing detection, diagnosis, replacement and calibration on the LRU to be screened, and the fault rate information of the LRU to be screened.
In particular, the evaluation calculation of the failure rate and the complexity respectively adopts logic values 1 and 0 to calculate the failure rate and the complexity respectively.
In particular, the calculating the failure rate using the logic values 1 and 0 includes:
comparing the fault rate of the LRU to be screened with the minimum lower limit value of the fault rate of the LRU;
when the fault rate of the LRU to be screened is greater than the minimum lower limit value of the fault rate of the LRU, the calculated logic value is 1;
and when the fault rate of the LRU to be screened is smaller than the minimum lower limit value of the fault rate of the LRU, the calculated logic value is 0.
The complexity is obtained by performing weight calculation on a maintenance tool which is operated by a person, is rapid and convenient to use.
In particular, the calculating the complexity using the logic values 1 and 0 includes:
comparing the complexity of the LRU to be screened with the minimum lower limit value of the LRU complexity;
when the complexity of the LRU to be screened is greater than the minimum lower limit value of the complexity of the LRU, the calculated logic value is 1;
and when the complexity of the LRU to be screened is smaller than the minimum lower limit value of the complexity of the LRU, the calculated logic value is 0.
Wherein the filtering calculation uses a formula
Figure BDA0001942599410000031
Comprehensively balancing the failure rate and the complexity of the screened objects;
when c is going toiIf 1, the filter object is determined to pass through, and becomes LRU.
When c is going toiWhen the value is 0, the filtering object is judged not to pass, and the non-LRU is determined.
To achieve the technical object of the present invention, a second aspect of the present invention provides an LRU screening apparatus based on definition and content interpretation, including:
the data acquisition module is used for analyzing the product structure and the product maintainability of the LRU to be screened in the product design stage and acquiring screening factors including fault rate factors and complexity factors;
the judgment analysis module is used for respectively evaluating and calculating the fault rate and the complexity through a set fault rate threshold value and a set complexity threshold value to respectively obtain a calculation result of a fault rate factor and an evaluation result of a complexity factor;
and the screening module is used for screening and calculating the evaluation result of the fault rate factor and the evaluation result of the complexity factor and confirming whether the LRU to be screened can become the LRU.
In particular, the analyzing of the product structure and the product maintainability of the LRU to be screened is to collect the number of interfaces and the complexity information of the LRU structure to be screened in the product structure, and to collect the time required for performing maintenance and replacement on the LRU to be screened in the product maintainability, the maintenance tool required for performing detection, diagnosis, replacement and calibration on the LRU to be screened, and the fault rate information of the LRU to be screened.
To achieve the technical object of the present invention, the third aspect of the present invention provides a use of the above method for product design.
To achieve the technical object of the present invention, a fourth aspect of the present invention provides a use of the above apparatus for product design.
The products include, but are not limited to, large equipment, consumer equipment, household appliances, and the like.
Has the advantages that:
the invention establishes the LRU screening criterion based on the LRU definition and the connotation by deeply analyzing the LRU definition and the connotation and considering two factors of fault rate factor and complexity factor, realizes the judgment of whether the product can become the LRU on the basis of the criterion, solves the current situation that the LRU planning work of the product in the field lacks normative guidance method and the work guide, and has important significance for guiding the product design planning and improving the maintainability design.
Drawings
Fig. 1 is a flowchart of an LRU screening method based on definition and content interpretation according to embodiment 1 of the present invention;
fig. 2 is a block diagram of an LRU screening method provided in embodiment 2 of the present invention;
fig. 3 is a flow chart of LRU screening provided in embodiment 2 of the present invention;
FIG. 4 is a schematic diagram of the screening factors of the LRU plan provided in embodiment 2 of the present invention;
fig. 5 is a schematic structural diagram of the LRU screening apparatus provided in embodiment 3 based on definition and content interpretation.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and it should be understood that the preferred embodiments described below are only for the purpose of illustrating and explaining the present invention, and are not to be construed as limiting the present invention.
Example 1
Fig. 1 shows a flowchart of an LRU screening method based on definition and content interpretation, which includes:
s101, in a product design stage, analyzing the product structure and the product maintainability of the LRU to be screened to obtain screening factors of fault rate factors and complexity factors;
s102, establishing a fault rate threshold value and a complexity threshold value, respectively evaluating and calculating the fault rate and the complexity, and respectively obtaining a calculation result of a fault rate factor and an evaluation result of a complexity factor;
s102, screening and calculating the evaluation result of the fault rate factor and the evaluation result of the complexity factor, and confirming whether the LRU to be screened can be the LRU.
The product structure comprises the number and complexity of the interfaces of the LRU structure to be screened.
The product maintainability comprises the time required for maintenance and replacement of the LRU to be screened, a maintenance tool required for detection, diagnosis, replacement and calibration of the LRU to be screened and the fault rate of the LRU to be screened.
The time required for maintenance and replacement of the LRU to be screened refers to the time required for a maintenance worker to perform detection, replacement and calibration on the LRU to be screened in the actual maintenance process.
The maintenance tools for the LRU to be filtered include the types and the number of the maintenance tools used for detecting, replacing and calibrating the object, and mainly pay attention to whether special tools are needed. The constraint condition of the maintenance tool for satisfying the core meaning of the LRU of the use environment is considered in the process of determining the LRU.
The fault rate of the LRU to be filtered is an important consideration in LRU filtering, where the fault rate refers to the fault rate of the LRU to be filtered within one year.
The setting of the failure rate threshold and the complexity threshold is set by a person skilled in the art, and may also be set according to a product design criterion or a design requirement.
In particular, the analyzing of the product structure and the product maintainability of the LRU to be screened is to collect the number of interfaces and the complexity information of the LRU structure to be screened in the product structure, and to collect the time required for performing maintenance and replacement on the LRU to be screened in the product maintainability, the maintenance tool required for performing detection, diagnosis, replacement and calibration on the LRU to be screened, and the fault rate information of the LRU to be screened.
In particular, the evaluation calculation of the failure rate and the complexity respectively adopts logic values 1 and 0 to calculate the failure rate and the complexity respectively.
In particular, the calculating the failure rate using the logic values 1 and 0 includes:
comparing the fault rate of the LRU to be screened with the minimum lower limit value of the fault rate of the LRU;
when the fault rate of the LRU to be screened is greater than the minimum lower limit value of the fault rate of the LRU, the calculated logic value is 1;
and when the fault rate of the LRU to be screened is smaller than the minimum lower limit value of the fault rate of the LRU, the calculated logic value is 0.
The complexity is obtained by performing weight calculation on a maintenance tool which is operated by a person, is rapid and convenient to use.
In particular, the calculating the complexity using the logic values 1 and 0 includes:
comparing the complexity of the LRU to be screened with the minimum lower limit value of the LRU complexity;
when the complexity of the LRU to be screened is greater than the minimum lower limit value of the complexity of the LRU, the calculated logic value is 1;
and when the complexity of the LRU to be screened is smaller than the minimum lower limit value of the complexity of the LRU, the calculated logic value is 0.
Wherein the filtering calculation uses a formula
Figure BDA0001942599410000051
Comprehensively balancing the failure rate and the complexity of the screened objects;
when c is going toiIf 1, the filter object is determined to pass through, and becomes LRU.
When c is going toiWhen the value is 0, the filtering object is judged not to pass, and the non-LRU is determined.
It should be noted that the method of the present invention is applicable to large-scale equipment, civil equipment, household appliances, etc.
Example 2
In practical applications, the screening steps of the LURs to be screened are as follows, and refer to the LRU screening method block diagram shown in fig. 2 and the LRU screening flow detailed diagram shown in fig. 3:
1. analysis of the LURs to be screened
Collecting the information of the structural composition of the screened object, the time required by maintenance and replacement, the maintenance tools required by detection, diagnosis, replacement and adjustment and the failure rate.
The structure composition of the screening object mainly collects the number and complexity of interfaces of the structure.
The time required for maintaining and replacing the screened object refers to the time required by the maintenance personnel to perform the whole process of detecting, replacing, adjusting and correcting the screened object in actual maintenance.
The maintenance tool of screening object is including detecting the kind and the quantity of the maintenance tool that this object of change alignment will be used, and whether special tool need be used to main notice. The constraint condition of the maintenance tool for satisfying the core meaning of the LRU of the use environment is considered in the process of determining the LRU.
The failure rate of the filter objects is an important consideration in LRU filtering, where failure rate refers to the failure rate of the filter objects over a year.
2. Judging fault rate factors and complexity factors of screened objects
And (4) judging the fault rate factor and the complexity factor of the screened object on the basis of the information collected in the step (1). The screening factors for screening the screening subjects are shown in fig. 4. The failure rate factor and the complexity factor are first level factors, and the sub-factors are second level factors.
2.1. Failure rate factors:
if n screening objects exist, the corresponding failure rate is recorded as lambdai(i ═ 1,2, …, n). Those skilled in the art can set the minimum lower limit value lambda of LRU fault rate according to the actual condition of the project0. By setting the failure rate lambda of the screened objectiAnd LRU fault rate minimum lower limit lambda0Comparing to obtain the fault rate output of the screening object
Figure BDA0001942599410000061
The failure rate is evaluated here with logic values 1 and 0.
The fault rate output result of the ith screening object is as follows:
when λi>λ0The failure rate of the object to be screened is output
Figure BDA0001942599410000062
When λi<λ0The failure rate of the object to be screened is output
Figure BDA0001942599410000063
2.2. Complexity factor:
first, a person skilled in the art sets weight values of three aspects of personnel operation, rapidness, convenience and maintenance tools in the complexity factor according to the actual situation of a project, wherein the weight values are occupied in the screening work of a screened object, the weight value of the personnel operation aspect is α, the weight value of the rapidness, convenience aspect is β, and the weight value of the maintenance tool aspect is gamma.
And secondly, scoring the screened object in three aspects of personnel operation, rapidness, convenience and maintenance tools in the complexity factor of the screening work by a professional technician group in the field according to the actual situation of the project. The score corresponding to the ith screening object in the aspect of human operation is recorded as AiScore in terms of speed and convenienceIs marked as BiScore in terms of service tool is noted as Ci。Ai、Bi、 CiThe value range of (1) is (0), and the precision is 0.1.
Human operation aspect, AiThe size of the screen is reduced along with the increase of the number of people required for replacing the screening object and the technical grade requirement on maintenance personnel.
Quick and convenient aspect, BiWith increasing ease of repair of the screening object.
Aspect of maintenance tools, CiWith the size of the screening object decreasing with increasing kinds of maintenance tools required for replacing the screening object.
Finally, those skilled in the art have established a minimum lower score limit c for the LRU complexity factor based on the actual condition of the project0. Carrying out complexity scoring on the ith screening object, wherein the scoring is according to a formula
Figure BDA0001942599410000064
And (6) performing calculation. By scoring the complexity of the most filtered objects
Figure BDA0001942599410000071
And LRU complexity score minimum lower limit value c0The comparison and judgment are carried out to obtain the complexity output of the screened object
Figure BDA0001942599410000072
The complexity is evaluated here with logic values 1 and 0. The complexity output result of the ith screening object is as follows:
when
Figure BDA0001942599410000073
The complexity output of the screening object
Figure BDA0001942599410000074
When
Figure BDA0001942599410000075
The complexity output of the screening object
Figure BDA0001942599410000076
3. Comprehensively balancing the output results of the fault rate factor and the complexity factor to obtain the final conclusion
According to the output result of the failure rate factor and the complexity factor in the step two, a formula is utilized
Figure BDA0001942599410000077
And comprehensively balancing the failure rate and the complexity of the screened objects.
When c isiIf 1, the filter object is determined to pass through, and becomes LRU.
When c isiWhen the value is 0, the filtering object is judged not to pass, and the non-LRU is determined.
Example 3
As shown in fig. 5, the present invention provides an LRU screening apparatus based on definition and content interpretation, comprising:
the data acquisition module 1 is used for acquiring screening factors including fault rate factors and complexity factors by analyzing the product structure and the product maintainability of the LRU to be screened in the product design stage;
the judgment analysis module 2 is used for respectively evaluating and calculating the fault rate and the complexity through a set fault rate threshold value and a set complexity threshold value to respectively obtain a calculation result of a fault rate factor and an evaluation result of a complexity factor;
and the screening module 3 is used for screening and calculating the evaluation result of the fault rate factor and the evaluation result of the complexity factor and confirming whether the LRU to be screened can become the LRU.
In particular, the analyzing of the product structure and the product maintainability of the LRU to be screened is to collect the number of interfaces and the complexity information of the LRU structure to be screened in the product structure, and to collect the time required for performing maintenance and replacement on the LRU to be screened in the product maintainability, the maintenance tool required for performing detection, diagnosis, replacement and calibration on the LRU to be screened, and the fault rate information of the LRU to be screened.
The parts of the above modules not described are referred to the contents of examples 1 and 2.
Application example 1
LRU screening is performed, for example, using an equipment consisting of A, B, C, D4 components. Wherein, the A can be simply maintained by one person, the maintenance is fast and convenient, and a special tool is not needed; b, one person can simply maintain the device, the maintenance is fast and convenient, and special tools are needed; c, one person can carry out complex maintenance, the maintenance is fast and convenient, and special tools with relatively more types are needed; d can be maintained by one person in a complex way, is quick and convenient to maintain and needs a special tool.
Then, the failure rate λ of A is determined from the conventional failure analysis data12.5%, failure rate λ of B20.05%, failure rate λ of C35%, failure rate λ of D4Not more than 8%. The minimum lower limit value lambda of the failure rate of the screened object determined by a person skilled in the art of the equipment0＝0.1％。
Meanwhile, a person skilled in the equipment field determines that the weight value of the screening object complexity factor in the aspect of the operation of the person is α -0.38, the weight value of the quick and convenient aspect is β -0.33, and the weight value of the maintenance tool aspect is gamma-0.2910.9, score B in terms of speed and convenience10.9, a score of C for the maintenance tool10.9; the determined complexity factor of B is divided into A20.9, score B in terms of speed and convenience20.9, the score in terms of service tool is C20.6; the determined complexity factor of C has a score of A in terms of human operation30.6, score B in terms of speed and convenience30.8, score C in terms of service tools30.4; the determined complexity factor of D has a score of A in terms of human operation40.3, score B in terms of rapidity and convenience40.4, the score in terms of service tool is C4＝0.9。
And, the person skilled in the art of such equipmentMinimum lower limit value c of score of LRU complexity factor based on project actual situation0＝0.85。
The equipped LRU screening steps are as follows:
the flow of LRU screening of the screen object A, B, C, D is shown in fig. 3.
1. Component of an analytical device
Collecting the structural composition of the screening object, the time required by maintenance and replacement, and the information of maintenance tools and failure rate required by detection, replacement and adjustment of the screening object.
2. Judging fault rate factors and complexity factors of screened objects
And judging the failure rate factor and the complexity factor of the screened object on the basis of the information collected in the step 1.
2.1. Failure rate factors:
from the description of the equipment it is known that: failure rate λ of A12.5%, failure rate λ of B20.05%, failure rate λ of C35%, failure rate λ of D4Not more than 8%. The minimum lower limit value lambda of the fault rate of the screening object determined according to the actual use condition of the screening object00.1%. Due to lambda1>λ0Therefore, the failure rate of A outputs the result
Figure BDA0001942599410000081
Due to lambda2<λ0Therefore, the failure rate of B outputs the result
Figure BDA0001942599410000082
Due to lambda3>λ0Therefore, the failure rate of C outputs the result
Figure BDA0001942599410000083
Due to lambda4>λ0Therefore D fail rate output results
Figure BDA0001942599410000084
2.2. Complexity factor:
first, it is known from the description of the equipment that the weight value for the operator is α -0.38, the weight value for the operator is β -0.33, and the weight value for the maintenance tool is γ -0.29, in the complexity factor set up according to the actual use of the screening target.
Secondly, according to the description of the equipment, the complexity factor of A, B, C, D is established, and the scoring is carried out according to three aspects of personnel operation, rapidness, convenience and maintenance tools. The score of the human operation aspect in the complexity factor of A is A10.9, and B in terms of rapidness and convenience10.9, the score in terms of service tool is C10.9. The score of the human operation aspect in the complexity factor of B is A20.9, score B in terms of speed and convenience20.9, the score in terms of service tool is C20.6. The score of the human operation aspect in the complexity factor of C is A30.6, score B in terms of speed and convenience30.8, the score in terms of service tool is C30.4. D the score of the human operation aspect in the complexity factor is A40.3, score B in terms of rapidity and convenience40.4, the score in terms of service tool is C4＝0.9。
Finally, a minimum lower limit value c of the score describing the LRU complexity factor by the equipment00.85. The complexity score of A is based on the formula cs＝αAi+βBi+γCiIs calculated to obtain
Figure BDA0001942599410000091
Due to the fact that
Figure BDA0001942599410000092
Therefore, the complexity of the screened object outputs the result
Figure BDA0001942599410000093
Complexity scoring for B
Figure BDA0001942599410000094
Due to the fact that
Figure BDA0001942599410000095
Therefore, the complexity of the screened object outputs the result
Figure BDA0001942599410000096
Complexity scoring for C
Figure BDA0001942599410000097
Due to the fact that
Figure BDA0001942599410000098
Therefore, the complexity of the screened object outputs the result
Figure BDA0001942599410000099
Complexity scoring for D
Figure BDA00019425994100000910
Due to the fact that
Figure BDA00019425994100000911
Therefore, the complexity of the screened object outputs the result
Figure BDA00019425994100000912
3. Comprehensively balancing the output results of the fault rate factor and the complexity factor to obtain the final conclusion
Calculating A according to the output results of the fault rate factor and the complexity factor of the screened object in the step 2
Figure BDA00019425994100000913
Get a can become LRU. Calculated as to B
Figure BDA00019425994100000914
Resulting in B being non-LRU. Calculated as C
Figure BDA00019425994100000915
Resulting in C being non-LRU. Calculated as D
Figure BDA00019425994100000916
Resulting in D being non-LRU.
Although the present invention has been described in detail hereinabove, the present invention is not limited thereto, and those skilled in the art can make various modifications based on the principle of the present invention. Thus, modifications made in accordance with the principles of the present invention should be understood to fall within the scope of the present invention.

Claims (10)

1. An LRU screening method based on definition and content interpretation, comprising:
in the product design stage, the screening factors of failure rate factors and complexity factors are obtained by analyzing the product structure and the product maintainability of the LRU to be screened;
setting a fault rate threshold value and a complexity threshold value, respectively evaluating and calculating the fault rate and the complexity, and respectively obtaining a calculation result of a fault rate factor and an evaluation result of a complexity factor;
and screening and calculating the evaluation result of the fault rate factor and the evaluation result of the complexity factor, and determining whether the LRU to be screened can be the LRU.
2. The method of claim 1, wherein the product structure comprises a number of interfaces and a complexity of the LRU structure to be screened.
3. The method of claim 1, wherein the product serviceability includes a time required for a service replacement of the LRU to be screened, a service tool required for detection of a diagnostic replacement alignment of the LRU to be screened, and a failure rate of the LRU to be screened.
4. The method as claimed in claim 1, wherein the analyzing of the product structure and the product maintainability by the LRU to be screened is a collection of information on the number of interfaces and complexity of the LRU structure to be screened in the product structure, and a collection of information on a time required for the service replacement of the LRU to be screened in the product maintainability, a service tool required for the detection diagnosis replacement tuning of the LRU to be screened, and a failure rate of the LRU to be screened.
5. The method of claim 1, wherein the evaluation calculations for failure rate and complexity, respectively, are performed using logical values of 1 and 0, respectively;
the complexity is obtained by performing weight calculation on a maintenance tool which is operated by a person, is rapid and convenient to use.
6. The method of claim 1, wherein the filtering calculation uses a formula
Figure FDA0001942599400000011
Comprehensively balancing the failure rate and the complexity of the screened objects;
when c isiIf 1, the filter object is determined to pass through, and becomes LRU.
When c isiWhen the value is 0, the filtering object is judged not to pass, and the non-LRU is determined.
7. An LRU screening device based on definition and content interpretation, comprising:
the data acquisition module acquires and obtains screening factors including fault rate factors and complexity factors by analyzing the product structure and the product maintainability of the LRU to be screened in the product design stage;
the judgment analysis module is used for respectively evaluating and calculating the fault rate and the complexity through the set fault rate threshold and the complexity threshold to respectively obtain a calculation result of the fault rate factor and an evaluation result of the complexity factor;
and the screening module is used for screening and calculating the evaluation result of the fault rate factor and the evaluation result of the complexity factor and confirming whether the LRU to be screened can become the LRU.
8. The apparatus of claim 7, wherein the analyzing of the product structure and the product maintainability by the LRU to be screened is a collection of information on the number of interfaces and complexity of the LRU structure to be screened in the product structure, and a collection of information on a time required for the service replacement of the LRU to be screened in the product maintainability, a service tool required for the detection diagnosis replacement tuning of the LRU to be screened, and a failure rate of the LRU to be screened.
9. Use of the method of claims 1-6 for product design.
10. Use of the device according to claims 7-8 for product design.
CN201910026252.4A 2019-01-11 2019-01-11 LRU screening method and device based on definition and connotation interpretation and application Pending CN111008711A (en)

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