Abstract
When setting reliability requirements at the stage of designing electrothechnical systems, if they are recoverable given that requirements for durability and preservation are defined for them, the total number of single and complex measures of reliability as defined in reference documents is within 5-7. The developed schematic and design versions of these systems have reliability that differs in quantitative figures, which make it impossible to give clear preference to a certain technical solution. Therefore, there is an objective need to have such a measure of reliability, which would completely describe basic properties of the reliability of a electrothechnical system, if individual measures meet the specification requirements. The paper proposes an approach for generating integrated reliability measures for alternatives of the electrothechnical system being designed. The approach is based on the use of the Analytic Hierarchy Process (AHP) developed by Thomas L. Saaty and widely used in addressing various multicriteria problems. Application of this method makes it possible to carry out the analysis of expert and statistical information on reliability, taking into account the weight characteristics of indicators. Calculated values of global (composite) priorities of alternative variants of the developed system, as an integral (complex) indicator of reliability is proposed to apply. The integrated reliability measure for options of the electrothechnical system is a consolidated characterization that synthesizes individual single and complex reliability measures defined in the specification. The use of the integrated measure to determine the level of reliability makes it possible to obtain a formalized result that is expressed through the corresponding value of the vector of global priorities and facilitates the quantification of the superiority in terms of reliability of one alternative of the electrothechnical system over another. The operability and adequacy of the approach taking as an example determining the integral indicators of the reliability of centrifugal separator options for the chemical industry was carried out.
Keywords
Dependability, system, measure, analysis, method, hierarchy, level, decomposition, stage.
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