System reliability allocation of X-type rotating machine based on the fuzzy theory

The reliability allocation needs to be done during the preliminary design stage of the product. Usually, the result of the allocation is obtained by centralizing the subjective judgments of some specialists, which is unreliable and incomplete because of the fuzzy target, the complexity and localization of the specialists. The reliability of the X-type rotating machine is allocated by means of the comprehensive judgment in the fuzzy theory and in consideration of multi-aspect of fuzzy factors. This method is clear in the conception and good for the preliminary design of the X-type rotating machine.