Fuzzy Reliability Design for the Interference Articulation of a Roller Shaft

1 IntroductionA flour-milling machine is the most important piece of equipment for a mill, and the roller for the flour-milling machine is a key element. At present, most rollers are manufactured by using interference articulation between the roller and the shaft. As feed and distance between the rollers are of a certain randomness and fuzziness, the actual working torque of a roller is random and fuzzy. In addition, the interference quantities, modulus of elasticity and strength limits are al…

Fuzzy Reliability Design for the Interference Articulation of a Roller Shaft

With regard to function, the strengths for interference articulation of a roller shaft formed a series system. As the three strength reliabilities conditioned each other, there was a problem for the system reliability to apportion rationally. In fact, there was a transition from safety to deactivation. The state of structure was fuzziness which was in both safety and non-safety states. Therefore the reliability was a fuzzy event which considered the randomness for some design parameters and the fuzziness for the thresholds between generalized strength safety and deactivation. The mathematical model of fuzzy reliability design for the interference articulation of the roller shaft was presented. Eight design examples were calculated.