کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
807667 | 1468221 | 2016 | 11 صفحه PDF | دانلود رایگان |
• An indirect probability model (IPM) is proposed for mechanism reliability evaluation.
• The dynamic equation, degradation function and Kaplan–Meier estimator are used.
• Then the simplified form of indirect probability model is proposed.
• The experimental results agree well with the predicted results.
Mechanism reliability is defined as the ability of a certain mechanism to maintain output accuracy under specified conditions. Mechanism reliability is generally assessed by the classical direct probability method (DPM) derived from the first order second moment (FOSM) method. The DPM relies strongly on the analytical form of the dynamic solution so it is not applicable to multi-body mechanisms that have only numerical solutions. In this paper, an indirect probability model (IPM) is proposed for mechanism reliability evaluation of multi-body mechanisms. IPM combines the dynamic equation, degradation function and Kaplan–Meier estimator to evaluate mechanism reliability comprehensively. Furthermore, to reduce the amount of computation in practical applications, the IPM is simplified into the indirect probability step model (IPSM). A case study of a crank–slider mechanism with clearance is investigated. Results show that relative errors between the theoretical and experimental results of mechanism reliability are less than 5%, demonstrating the effectiveness of the proposed method.
Journal: Reliability Engineering & System Safety - Volume 149, May 2016, Pages 96–106