Reliability allocation method

Abstract

Provided is a reliability / maintainability distribution method comprising the following steps: listing components and failure rates of similar products which are the same or similar to those of an analyzed product; analyzing a fault reason and a fault reason proportion; feasible improvement measures are listed; prioritizing the improvement measures; selecting improvement measures with high priorities, and calculating a system reliability predicted value lambda < total >; repeating the operation until lambda is less than K lambda all the time to obtain a plurality of improvement measure combinations meeting the requirements, and integrating all factor choices; and according to the selected improvement measures, calculating a reliability evaluation value of each functional part or system of the product, and taking the reliability evaluation value as a reliability distribution value, so that the corresponding improvement measure combination is a guidance list for subsequent design improvement. According to a reliability allocation / prediction result, maintainability allocation work can be carried out accordingly, the maintainability allocation method is similar to the reliability allocation method, and the obtained corresponding improvement measure combination is also a guidance list for subsequent design improvement. The method has the advantages of being high in universality and operability.

Description

Technical field [0001] The present invention relates to a reliability / maintainability distribution method, in particular to a reliability / maintainability distribution method suitable for mechanical, electrical and electronic products. Background technique [0002] At present, the existing reliability distribution methods mainly include scoring distribution method, proportional combination distribution method, analytic hierarchy process, AGREE distribution method and direct distribution method. The project weighted distribution method proposed by Xi'an University of Technology and ZTE Corporation. Among them, the AGREE distribution method takes into account the degree of influence of the failures of the components of the system on the system failures, and can realize the relative accuracy of the distribution among the components of the product; the proportional combination distribution method is suitable for similar physical models that can be referred to. A certain data foundati...

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Problems solved by technology

Among them, the AGREE allocation method takes into account the impact of the failure of each unit of the system on the system failure, and can achieve the relative accuracy of the allocation among the components of the product; the proportional combination allocation method is suitable for similar physical models that can be referred to, and the model A certain data basis is required, but this method does not take into account the unequal working hours of the various components of the system; the direct allocation method is too rough, and is only suitable for rough allocation before design, and the accuracy is not high, and subsequent major adjustments are required ;Scoring assignment method is suitable for the situation where the reference data is scarce, and the high accuracy of assignment depends on the ability of the participating scoring personnel

None of the above four allocation methods can combine the follow-up improvement cost and the difficulty of implementation, so the allocation value needs to be continuously updated and adjusted as the design progresses. The allocation efficiency is not high, and the versatility is not strong, and the operability It is not strong, it is difficult to establish a strong correlation with the formulation of subsequent improvement measures, and it is impossible to intuitively and directly guide the ideas and methods of design improvement

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