A fuzzy set approach for reliability calculation of valve controlling electric actuators

International Conference on Mechanical Engineering, Automation and Control Systems 2016

机械制造;无线电电子学;计算机科学

Karmachev, D.P.^1 ; Yefremov, A.A.^1 ; Luneva, E.E.^1

Tomsk Polytechnic University, Lenina Ave., 30, Tomsk

634050, Russia^1

关键词: Environmental conditions;    Equipment reliability;    Geometric distribution;    Hazard rate functions;    Operational modes;    Performance reliability;    Reliability calculation;    Reliability model;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/177/1/012027/pdf
DOI  :  10.1088/1757-899X/177/1/012027

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

The oil and gas equipment and electric actuators in particular frequently perform in various operational modes and under dynamic environmental conditions. These factors affect equipment reliability measures in a vague, uncertain way. To eliminate the ambiguity, reliability model parameters could be defined as fuzzy numbers. We suggest a technique that allows constructing fundamental fuzzy-valued performance reliability measures based on an analysis of electric actuators failure data in accordance with the amount of work, completed before the failure, instead of failure time. Also, this paper provides a computation example of fuzzy-valued reliability and hazard rate functions, assuming Kumaraswamy complementary Weibull geometric distribution as a lifetime (reliability) model for electric actuators.