Reliability monitoring programs for use during research and development of radar equipment
Some standard content:
Standard SJ2585-85 of the Ministry of Electronics Industry of the People's Republic of China
Reliability Monitoring Procedures in the Development Process of Radar Equipment Published on March 25, 1985
Implemented on January 1, 1986
Ministry of Electronics Industry of the People's Republic of China
Standard SJ2585-85 of the Ministry of Electronics Industry of the People's Republic of ChinaReliability Monitoring Procedures in the Development Process of Radar Equipment1.1 Applicable Model
SJ258585
This standard specifies the reliability monitoring procedures and specific requirements for new products of shipborne, airborne and ground radar equipment (hereinafter referred to as products) at various stages of the development process. 1.2 Explanation
1.2.1 The reliability monitoring of products should be implemented and controlled in a timely manner as each work link of the development process proceeds. It should be closely combined with planning management, quality management, material management, and economic management, and should be comprehensively weighed to achieve the best results.
1.2.2 According to the maturity and complexity of the technology, various products can make necessary additions and subtractions to the reliability monitoring procedures and requirements specified in this standard.
2 Definitions
Reliability monitoring procedures refer to the use of reliability technology by the reliability management organization to supervise and control each work link of new product development so that product reliability can be increased and the expected purpose can be achieved. 2.1 General definitions
General reliability terms not defined in this standard are defined in accordance with GB3187-82 "Basic Terms and Definitions of Reliability".
2.2 Reliability structural model and mathematical model
Reliability structural model refers to the logical relationship between the whole machine and the submachine, components and components from the perspective of reliability, and this relationship is expressed by a block diagram. The mathematical model is the description of this relationship by mathematical methods.
2.3 Reliability Index Prediction
Based on the component failure rate data provided by the National Reliability Data Center or the component failure rate data confirmed by the manufacturer and the user, according to the reliability structure model and mathematical model of the product, the reliability index of the unit, sub-unit and the whole machine of the product is quantitatively predicted by applying the prediction formula proved to be basically accurate and reliable by theory and field data. 2.4 Reliability Index Allocation
Based on different requirements and actual use conditions, the product reliability index is quantitatively allocated to each sub-unit, unit and component according to the reliability structure model and mathematical model using the weighted allocation method. 2.5 Derating Design
Issued by the Ministry of Electronics Industry on March 25, 1985
Implemented on January 1, 1986
SJ2585-85
Derating design refers to the design measures in which the electrical stress and environmental thermal stress actually applied by the components in the product are below their rated values.
2.6 Margin design
Design measures to prevent product failures caused by gradual changes in the characteristic values of electronic components and structural parts due to changes in environmental stress and deterioration of electronic components and structural parts due to long-term use. 2.7 Electromagnetic compatibility design
Design measures to prevent electromagnetic interference from outside and inside the product from affecting circuit functions and limiting external interference.
2.8 Purchase design
Design measures to add some components, parts, and extensions to enable the product to reliably complete its specified functions. 2.9 Environmental adaptability design
Design measures to enable the product to normally complete the specified functions within the specified time under the specified various environmental stresses.
2.10 Environmental isolation design
Design measures to isolate the adverse effects of various environmental stresses on the product. 2.11 Maintainability Design
Design measures taken to ensure that the product can maintain or restore the specified functions when it is repaired under specified conditions, within a specified time, and according to specified procedures and methods. 2.12 Usability Design
Design measures taken to make the product easy to use and avoid operating errors. 2.13 Safety Design
Design measures to ensure the personal safety of product operators and maintainers. 2.14 Reliability Development Test
In order to provide engineering information on the form and mechanism of failure under natural and reduced environmental conditions in the early stage of product development (scientific research stage), and to provide the required information for estimating the reliability of the product, the reliability is improved through the iterative process of testing, analysis and determination. The purpose of this test is not to identify or accept reliability indicators, but to solve various problems existing in the design of reliability engineering, so as to improve the reliability of the product in a regular and standardized way and increase the reliability of the product. 2.15 Reliability growth test
The product is subjected to several consecutive mission simulation cycles under the expected use environment conditions to provide engineering information on the failure mode and failure mechanism of the tested product under natural and specified environmental conditions. After the failure mode and mechanism are found and determined, improvement measures are taken to prevent the failure from recurring, thereby obtaining a test that improves reliability. 2.16 Reliability identification test and reliability acceptance test Reliability identification test, reliability acceptance test, reliability field test and environmental test are respectively defined in SJ2584-85 "Feasibility Identification Test and Acceptance Test for Radar Equipment" and GB2421-81 "Basic Environmental Test 2
Procedures for Electrical and Electronic Products".
2.17 Reliability Intelligence Feedback
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The process of passing the results of product reliability control back to the original control department to confirm or improve the reliability control implementation.
3 Reliability Monitoring Procedure Flow and General Requirements The corresponding reliability monitoring procedure flow for the four stages of the product development process (scientific research stage, technical design stage, prototype development stage and trial production stage) is shown in Figure 1. 3.1 Monitoring Procedure and General Requirements for Scientific Research Stage 3.1.1 When the user proposes a product tactical and technical task book, the manufacturer shall make a preliminary estimate of the reliability index and maintainability index proposed in the task book, and jointly determine the reliability and maintainability index according to the task needs and feasibility. 3.1.2 While conducting the product solution demonstration, the reliability and maintainability solution demonstration of the product shall be conducted, and a "Reliability and Maintainability Solution Demonstration" report shall be written. The specific requirements of the "Reliability and Maintainability Solution Demonstration Report" are shown in Article 4.1.
3.1.3On the basis of reliability prediction, reliability analysis and demonstration, when selecting and proposing the preliminary product composition plan, the best composition plan that meets the reliability requirements must be considered. …A good optimal composition plan should be the best combination of the following plans:
a. The best composition plan based on economy: b. The best composition plan based on reliability: c. The best composition plan based on technical performance; d. The best composition plan based on weight and volume. 3.1.4After the preliminary plan is determined, by establishing a reliability structure model and a mathematical model, and on the basis of reliability prediction, the reliability and maintainability indicators of each sub-unit are allocated, and the "Reliability Design Specifications for the Scientific Research Stage" are formulated. The specific requirements of the "Reliability Design Specifications for the Scientific Research Stage" are shown in Article 4.2. 3.1.5At the same time as the joint performance test of the special topic, sub-unit and the whole system, environmental tests and reliability development tests are carried out, and the reliability of each special topic and the whole system is evaluated, and a "Reliability Evaluation Report" is written. The reliability assessment report should include the following contents: a) Environmental test procedures, environmental condition stress and action time; b) Phenomena found in failure under various environmental conditions, determination of failure mechanism and failure cause; c) Statistics of various failure analysis. If it is a scheme problem, design problem (circuit design, structural design, etc.), manufacturing process problem (production tolerance, poor welding, assembly technology, debugging, etc.), component quality problem and others; d) Time of each problem and failure, as well as the severity of the problem and the nature of the failure (related failure and non-related failure); e) Propose specific corrective measures (including design, manufacturing process, components, etc.) and formulate reliability growth plans and programs. 3.1.6 Provide reliability intelligence feedback on the reliability assessment results. If necessary, re-study or partially modify and adjust the extension and each topic, or even modify the plan until the reliability requirements are met. 3.1.7 When drafting the research and development work and technical summary in the scientific research stage, it is necessary to draft the implementation status of the "reliability design specification" and the reliability technology summary report in the scientific research stage on the basis of the "reliability assessment report". 3.1.8 When formulating the test prototype development plan and technical requirements, it is necessary to formulate the test prototype reliability design specifications, and propose component selection requirements and component optimization manual (or list). The test prototype reliability design specifications are formulated based on the reliability assessment results after each topic and sub-machine undergo environmental testing and reliability development testing, as well as the modification of the reliability design specifications in the scientific research stage. The following principles should be used as conditions for components to be selected into the optimization manual: Components that can meet the performance requirements of the equipment: b Components that can meet the reliability requirements of the equipment: c Components that have been selected by units or multiple factories with practical experience: d. Components that have been proven to be stable, reliable and applicable by previous products of this unit, finalized products of external units or special topics and extension tests:
e. Compress the variety and specifications, and increase the reuse rate of similar components so that their variety and specification ratio can meet the design control requirements;
f. Under the premise of meeting the performance and reliability requirements, try to use cheap components and inventory components; g. Try to use components that meet national standards and professional standards. Components produced by multiple factories should be selected and selected. For components that must be used but have not yet been included in the standards, the manufacturer should be determined to jointly conduct quality control: Five, try to choose components from manufacturers with stable quality and timely delivery: 1 For some key components, a large number of tests must be carried out to confirm that the quality is good and the performance is stable before they can be selected. 3.2 Monitoring procedures and general requirements in the technical design stage 3.2.1 After the design of the test prototype is completed, a reliability design review must be carried out. The review content shall be reviewed item by item according to the requirements of the "Reliability Design Specification": Those that fail must modify the design. 3.2.2 Carry out detailed reliability prediction according to the design documents. If the reliability index requirements cannot be met, reliability design measures should be taken. For example: reduce the number of components as much as possible, select components with low failure rate, increase the derating level, take design measures, etc.
3.2.3 The design drawings should be reviewed for reliability design according to the "Electric Structure Design Drawing Review Specification" and countersigned.
3.2.4 According to the "Component Restriction Requirements" and "Component Optimization Manual", the circuit design and structure design should be reviewed for component application. Those that do not meet the requirements cannot be selected. For individual components, they can be selected after approval due to supply shortages and special requirements on the equipment, but they must be registered and replaced whenever possible. 3.2.5 After the extension and circuit design are completed, the sensitivity of the circuit and its components to stress should be analyzed within the specified working condition limit range, according to various environmental stresses and electromagnetic interference factors, under steady-state and dynamic conditions. The following analysis should usually be performed: a. Maximum input signal change
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b. Maximum power supply voltage change and power supply change (on-off test): c: Maximum component parameter change:
d. Under environmental stress limit conditions and dynamic conditions; e. Under the condition of loss of safety measures;
f. Under the condition of no backup measures:
g. Under electromagnetic interference:
These analyses should be implemented and arranged as an integral part of the design work and taken into consideration during the reliability review.
3.2.6 According to the existing design documents or data (such as block diagrams, electrical schematics, structural diagrams, etc.), conduct failure mode and impact analysis to obtain at least the following information: a. A general description of the function of each extension being analyzed; b. A detailed description of the failure mode of each extension; c. A detailed description of the impact of all failure modes on product operation; d. A detailed description of the cause of each failure mode; c. An estimate of the probability of occurrence of each failure mode; f. A detailed description of the control methods and measures for known and determined failure modes; g. A description of the main and secondary effects of each determined failure mode. Failure mode and impact analysis should include the failure mode and impact analysis of functions and the failure mode and impact analysis of individual components.
3.2.7 Before manufacturing the test prototype, key manufacturing process technologies must be resolved. These include key process technologies and tooling molds for electrical interconnection, machining and assembly. Key manufacturing process technologies are derived in the design of the test prototype based on failure mode analysis and impact analysis and experience analysis and summary in the scientific research stage. 3.2.8 Before manufacturing the test prototype, a reliability manufacturing specification should be formulated. This specification is formed based on the summary of previous manufacturing experience of this unit and the solution of key reliability process technology. Reliability manufacturing specifications include the following contents: a. Regulations for the selection of outsourced raw materials for components: b. Regulations for the inspection of incoming raw materials for components: c. Regulations for the storage and operation of raw materials for components: d. Regulations for the inspection of incoming accessories for outsourcing: e. Regulations for the aging and screening of components: f. Regulations for the production and inspection of mechanical parts: g. Regulations for electrical assembly and inspection: h. Regulations for the assembly and inspection of complete parts: i. Regulations for the processing and substitution of special parts: . Regulations for general assembly, adjustment and inspection: tt||, Regulations for intermediate inspection and final inspection: SJ2585-85 1. Regulations for civilized production and manufacturing environment control, etc. 3.2.9 Implement quality control throughout the entire manufacturing process. The quality control task in the manufacturing process is to establish a production line that can stably produce qualified and high-quality products, grasp the quality control of each link, strictly implement technical standards, ensure that product quality fully meets or exceeds the requirements of technical standards, strive to produce high-quality products, and minimize unqualified products. To this end, the following work must be done:
8, do a good job in pre-production preparation, reasonably arrange production operation plans, strengthen production scheduling to promptly solve weak links, and organize balanced production;
b, establish and improve the post responsibility system, and promptly formulate or revise and strictly implement various operating procedures and process specifications. Unsuitable raw materials will not be used, unqualified semi-finished products will not be circulated, unqualified finished products cannot be accepted as qualified products, and unqualified products will not be counted in output value and output. Any product that fails to meet the quality requirements of the previous process cannot enter the next process C. During the manufacturing process, inspections must be carried out strictly in accordance with design drawings, technical conditions, standards, processes and other technical documents. The implementation of process discipline is mainly based on self-inspection and mutual inspection, and semi-finished products and finished products are mainly based on special inspection. Implement the policy of combining mass inspection with full-time personnel inspection:
d. Control product quality during the manufacturing process, and conduct statistics and analysis of defective products in a timely manner. Management charts can be used for large-scale parts. For jobs with many varieties and small quantities, the focus is on improving engineering quality and controlling five quality factors (people, materials, machines, methods and manufacturing environment). Cause-effect diagrams can be used, and measures can be taken to prevent defective products:
e. The focus and activity place of quality control in the manufacturing process are generally in the manufacturing workshop. Therefore, the workshop should maintain a good production order, ensure that the production channel is unobstructed and the production site is neat and clean: f. Implementation of key technologies and processes to ensure product reliability during the manufacturing process. 3.2.10 While the test prototype is undergoing performance testing, environmental testing and reliability development testing should be carried out. During the test, refer to the national standards and professional (departmental) standards for environmental testing and reliability testing, and make detailed records. 3.2.11 During environmental testing and reliability development testing, various failure and defect data should be collected and recorded, and failure and defect analysis should be carried out. The main purpose of failure and defect analysis is to determine the potential weaknesses of the test prototype. Each potential failure and defect should be estimated to determine its impact on the completion of the task and classified according to its severity. Failure and defect analysis provides useful information for improving design and reliability and maintainability assessment.
3.2.12 Use the information from the reliability design review, reliability prediction, design drawing reliability review, component application review, branch and circuit stress analysis, failure form and impact analysis, environmental testing, reliability development testing, and failure and defect analysis of the test prototype to assess the reliability and maintainability of the test prototype. For those that are insufficient, propose improvement measures, revise the design documents, and include them in the test prototype manufacturing report and technical summary.
3.2.13 While formulating the technical requirements for the design of the prototype, the reliability design specifications for the prototype should be formulated. The reliability design specification for the finalized prototype is based on the design specification for the test prototype and the information obtained through the feasibility and maintenance assessment of the test prototype and the revision of the design documents of the test prototype, as well as the success, failure and deficiency of the reliability design measures implemented in the early stage. The reliability design specification is modified according to the characteristics and requirements of the finalized prototype development. 3.3 Monitoring procedures and general requirements in the prototype development stage 3.3.1After the design of the finalized prototype is completed, a strict and comprehensive reliability design review must be conducted in accordance with the "Finalized Prototype Reliability Design Specifications". During the reliability design review process, the extension and unit should provide the revised structural model and mathematical model, and count and predict according to the reliability prediction method based on the component failure rate data provided by the National Reliability Data Center or the component failure rate data confirmed by the manufacturer and the user. Reliability prediction should involve each working mode of the product specified in the product design specifications and reliability work plan, and treat them differently. The probability of the product working at a certain moment within the specified limit should be calculated from the entire task scope (including each stage), and the external supporting parts should still be predicted according to the specified method (for auxiliary equipment and circuits that do not affect the specified functions of the product, no prediction is required). The prediction results should be listed and archived for reference in the design drawing reliability review, component application review, failure mode and impact analysis, finalized prototype reliability and maintainability, and design finalized reliability report.
3.3.2 After the design of the finalized prototype is completed, the reliability and maintainability review of the design documents, the application review of components, the stress analysis of the extension and circuit, and the failure mode and impact analysis must still be strictly carried out. The stress analysis of the extension and circuit is basically the same as that of Section 3.2.5, and the failure mode and impact analysis is basically the same as that of Section 3.2.6. Special attention should be paid to the analysis of the extension and circuit that have major changes in the design of the test prototype. 3.3.3 Before the finalized prototype is manufactured, it is still necessary to solve the key reliability processes and formulate reliability manufacturing specifications. The reliability manufacturing specifications of the finalized prototype are based on the reliability manufacturing specifications in the technical design stage, and are verified, modified, and supplemented to make them more complete, strict and specific. During the manufacturing process of the finalized prototype, quality control is still required. The specific requirements are shown in Section 3.2.9.
3.3.4 At the same time as the performance test of the finalized prototype, in addition to environmental testing, reliability identification testing, and failure and defect data collection, field trial tests must be carried out. The site of the on-site test should preferably be a typical environment where the product will be put into use in the future. At least the following information should be obtained through on-site trial inspection: a. On-site statistical values of reliability indicators: h. On-site statistical values of maintainability indicators; c. Product fault location capability: d. Replaceability of failed parts of the product; e. Application characteristics of components and component failure statistics: f. Main failure modes of the product g. Main causes of various types of failures and their distribution; h. The impact of failures of each extension, unit, and circuit on the performance of the whole machine; 1. The impact of on-site environmental stress on the product: j. Product usability; k. Safety of product operation and maintenance: 1. Correctness and usability of various random documents and materials of the product: 7 SJ2585-85 m. Optimization of the variety and quantity of random spare parts: n. Availability of random maintenance tools and instruments, etc. Before the field test, a field test inspection outline should be formulated, which includes the determination of the test site, the arrangement of the test time, the inspection items, the inspection requirements, the various forms used for the inspection record and the specific requirements of the inspection report. 3.3.5 In the field test, field data collection is very important. It is the basic basis for failure analysis, reliability and maintainability assessment and reliability intelligence feedback. For this reason, detailed test records and test reports must be made. The test record and report requirements shall be implemented in accordance with SJ2166 "General Requirements for Electronic Equipment Reliability Test". 3.3.6 In the field test, special attention should be paid to the collection of field failure data. To this end, it is necessary to conduct on-site failure analysis during the test process. The analysis procedure is as follows: a. Description of failure mode: environmental conditions at the time of failure, stress conditions, working conditions, functions of the failed unit in the equipment, failure phenomena and effects, working time, and relevant original records before and after failure, etc. b. Determine the failure mechanism: Based on the observed phenomena and effects, conduct preliminary analysis and determine the possible causes of these phenomena related to the equipment. C. Confirm the failure mechanism: Prove whether the determined failure mechanism is true through some relevant tests and records. If it is not true, a new failure mechanism can be determined and confirmed again until it is correct. d. Take corrective measures: Based on the above analysis and judgment, put forward relevant ideas and suggestions aimed at eliminating the factors that cause failure. Its content includes scheme determination, design, manufacturing, use methods and use conditions, etc., so as to control until the main failure mode that causes failure is completely eliminated; e. Confirm the effectiveness of corrective measures: Whether the corrective measures are effective, to what extent, and whether they bring new failure factors, this still needs to be confirmed by repeated tests and single simulation tests. 3.3.7 Comprehensive data analysis is conducted based on various data obtained from environmental tests, reliability identification tests, and field tests on the finalized prototype, and the results are used as the basis for the reliability and maintainability assessment of the finalized prototype. 3.3.8 Based on the information obtained from the reliability and maintainability design review, reliability prediction, design drawing reliability review, component application review, branch and circuit stress analysis, and failure mode and impact analysis in the design of the finalized prototype, combined with the comprehensive data analysis results in Section 3.3.7, the reliability and maintainability assessment of the finalized prototype is conducted. In addition to being used as the basis for formulating the reliability design finalization report, the results are also used as useful information for reliability intelligence feedback. Through reliability and maintainability assessment, corrective measures should be taken for defects in the design, and the design documents should be revised to be cited as one of the materials for the reliability design finalization report. 3.3.9 When formulating the technical requirements for trial production, the technical requirements for trial production reliability should be formulated at the same time. Reliability technical requirements refer to the measures that should be taken for problems in the design and manufacturing process found in various tests, failure analysis and reliability and maintainability assessment of the finalized prototype, and then restrictive technical requirements are proposed to focus on solving new unreliable factors that may be brought about in manufacturing after modifying the design documents. 3.4 Monitoring procedures and general requirements in the trial production stage 3.4.1 In the trial production, each link in the manufacturing process should be strictly controlled in accordance with the reliability manufacturing specifications. This specification is based on the manufacturing specifications of the finalized prototype, and is modified and formulated according to the trial production technical requirements and the corrective measures proposed in the early stage 8
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3.4.2 In the trial production process, quality control should be strictly carried out in accordance with the manufacturing process. This quality control is more standardized than the previous quality control. The manufacturing process is shown in Figure 2. 3.4.3 Among the products that have passed the trial production acceptance test, a certain number of products shall be extracted according to the specified requirements for environmental testing. Environmental test conditions and methods shall be carried out in accordance with national standards, national military standards, professional (department) standards and enterprise standards or conditions agreed upon by the user and the manufacturer. 3.4.4 Products that have undergone environmental testing shall be subjected to reliability growth tests. The following issues should be noted when conducting reliability growth tests:
a. Simply eliminating the faults that occur in the tested product cannot correct the errors. Performance monitoring, fault detection, fault analysis, and modification and verification of design and manufacturing processes must be carried out to prevent the recurrence of similar faults on the tested product and the same batch of products in order to improve product reliability: b. In order to improve mission reliability, corrective measures should be focused on the forms of failure that have a fatal impact on the mission. At the same time, in order to improve basic reliability, corrective measures should be focused on the most frequent forms of failure, regardless of whether they have a fatal impact on the mission. These two aspects of work should be weighed so that both indicators can be increased as expected. 3.4.5 The reliability growth test plan should include the following: a. Test objectives and requirements, including the selected growth model and growth rate and the reasons for the two choices: b. Determination of the equipment under test and the number of test items for each equipment: c. Test conditions, environmental models, working models and performance models, and even working cycles: d. Test schedule and product life units expressed in calendar time (including test phases and test procedure review schedules): e. Test site planning, standards for accountability and responsibility boundaries: 1. Description and requirements of test equipment and test products g. Corrective action procedures and time to take measures; h. Time and funds scheduled for design modifications. Information collection and recording requirements; j. Failure reporting, analysis and corrective actions; k. Description of maintenance repairs completed during the test; 1. Final description of the test items; m. Other relevant matters to be considered.
3.4.6 Among the products in trial production, a certain number of products shall be selected according to the specified requirements for reliability identification test to determine whether they have met the specified reliability index requirements. The reliability identification test plan shall be formulated in accordance with national standards, national military standards, professional (department) standards or relevant enterprise standards or other criteria agreed upon by the user and the manufacturer.
3.4.7 Among the products in trial production, a certain number of products are selected for reliability field tests. The purpose of the tests is to understand the reliability level of the products in field use and to verify whether the stress level used in the laboratory simulation reliability test is appropriate. Field reliability tests can also make up for the current shortage of comprehensive environmental condition simulation equipment. For reliability identification tests of large-scale products or some products with special requirements, short-term reliability field tests can be adopted or inserted. There should be requirements for the technical level of the operating and maintenance personnel of the field tests. 3.4.8 Any failures of the products during environmental tests, reliability growth tests, reliability identification tests and reliability field tests must be carefully recorded, statistically analyzed, and reliability information feedback must be provided in a timely manner as a basis for modifying the design and manufacturing process. 3.4.9 When the product is shipped to the user, the following reliability specifications should be included in the product documents:
a. Operation and use regulations:
b. Daily maintenance details:
c. Fault repair details:
d. Safe operation and use regulations;
e. Storage requirements for supporting equipment and spare parts;
. Maintenance instrument and tool use requirements;
name, operation and use records and fault repair record regulations: h. Use environment control requirements.
3.4.10 When the product is shipped to the user department for trial use, reliability information feedback should be carried out. 3.4.10.1 There are two ways to feedback reliability information: a. The manufacturing unit conducts regular or regular surveys on users to collect reliability information during product use; b. The user department feeds back to the manufacturer, component factory and the National Reliability Data Center through daily detailed use and maintenance records and various reports.
These two types of reliability information feedback can be carried out at the same time. Through reliability information feedback, defects in product design and manufacturing can be corrected and the quality of components can be improved. Through comprehensive processing by the National Reliability Data Center, the reliability level of components and the entire product can be improved. 3.4.10.2 Through reliability information feedback, in addition to obtaining the reliability information in Section 3.3.4, the following information should also be obtained:
a. Actual environmental stress and its impact on the product; b. Product adaptability and protection capabilities to the environment; c. Distribution of product failure rate and maintenance rate; d. Comprehensive feedback from users on the portability and stability of various performances of the product; e. Product maintenance costs.
3.4.11 Before production finalization, a reliability production finalization report should be prepared, which is mainly based on environmental tests in trial production, lightness growth tests, reliability identification tests, reliability field tests and feedback from users during use, as well as the results of solving key technologies of reliability manufacturing processes in trial production. 10
4 Specific requirementsbzxZ.net
4.1 Reliability and maintainability scheme demonstration report SJ2585-85
The reliability and maintainability scheme demonstration report should include the following contents: 4.1.1 Reliability and maintainability index demonstration and determination: 8 expected index;
b index of similar equipment after statistical verification: c. index actually required for task execution;
d, index finally determined after comprehensive analysis based on the requirements and possible achievable conditions and considering constraints such as economy, volume, overload, and power consumption.
4.1.2 Reliability and maintainability index allocation. 4.1.3 Determination of the best configuration scheme,
a, the best configuration scheme based on reliability; b, the best configuration scheme based on economy: c. the best configuration scheme based on volume, weight, and power consumption: d, the best configuration scheme based on technical performance: e, the best configuration scheme finally determined after comprehensive consideration. 4.1.4 Reliability and maintainability assurance measures: a. Reliability and maintainability technical assurance measures: b. Reliability control and management assurance measures: 4.1.5 Reliability and maintainability assurance documents and materials: Reliability and maintainability design specifications:
b. Reliability and maintainability manufacturing specifications:
c. Reliability design review specifications:
d. Reliability index identification specifications;
e. Environmental test specifications;
f. Component limitation and optimization regulations:
g. Reliability implementation plan.
4.1.6 Reference documents and various standards. 4.2 Reliability design specifications for scientific research stage
Reliability design specifications for scientific research stage should include the following contents: 4.2.1 Reliability monitoring procedures.
4.2.2 Reliability monitoring procedure circulation system. 4.2.3 Reliability and maintainability indicators required for each extension. 4.2.4 Specific requirements and regulations for reliability design; a. Specific requirements and regulations for derating design:Component restrictions and optimization regulations:
g. Reliability implementation plan.
4.1.6 Reference documents and various standards. 4.2 Reliability design specifications for the scientific research stage
Reliability design specifications for the scientific research stage should include the following contents: 4.2.1 Reliability monitoring procedures.
4.2.2 Reliability monitoring procedure circulation system. 4.2.3 Reliability and maintainability indicators required for each extension. 4.2.4 Specific requirements and regulations for reliability design; a. Specific requirements and regulations for derating design:Component restrictions and optimization regulations:
g. Reliability implementation plan.
4.1.6 Reference documents and various standards. 4.2 Reliability design specifications for the scientific research stage
Reliability design specifications for the scientific research stage should include the following contents: 4.2.1 Reliability monitoring procedures.
4.2.2 Reliability monitoring procedure circulation system. 4.2.3 Reliability and maintainability indicators required for each extension. 4.2.4 Specific requirements and regulations for reliability design; a. Specific requirements and regulations for derating design:
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