Inference algorithms for the useful life of safety instrumented systems under small failure sample data

被引:0
|
作者
Mao, Qi [1 ]
Wang, Haiqing [1 ,4 ]
Yang, Ming [2 ]
Hu, Jason [3 ]
机构
[1] China Univ Petr East China, Electromech Engn Coll, Qingdao, Peoples R China
[2] Delft Univ Technol, Fac Technol, Dept Values Technol & Innovat, Safety & Secur Sci Sect, Delft, Netherlands
[3] Covestro Polymers China Co Ltd, Shanghai Chem Ind Pk, Shanghai, Peoples R China
[4] China Univ Petr East China, Qingdao, Peoples R China
关键词
Safety instrumented systems; Useful life; Reliability; Small samples; Failure rate; DESIGN; VERIFICATION; PREDICTION; RATES;
D O I
10.1016/j.psep.2022.12.024
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Safety instrumented systems(SIS) have been widely used in petroleum and chemical plants to detect and respond to dangerous events and prevent them from developing into accidents. The in-service time of SIS does not exceed its useful life is one of the crucial assumptions of IEC functional safety standards. The testing method recom-mended in the IEC standard is essentially a chi-square testing, where the testing effect is proportional to the sample size and, therefore, not suitable for testing the type of data distribution under small samples. In this paper, a rapid inference method of useful life (RIUL) is proposed to: i) determine whether the distribution type of failure data is exponential under small samples with the help of Anderson-Darling testing, and ii) use the Bayesian sequential testing method for estimating the useful life. The sequential posterior odds ratio testing is introduced to test the equipment failure rate one by one. The proposed RIUL approach is applied to the liquid -level protection circuit of the hot high-pressure separator. The engineering simulation results show that compared with IEC standard methods, the proposed method can be performed with fewer failure data, providing a theoretical basis for reasonable maintenance and replacement of equipment.
引用
收藏
页码:783 / 790
页数:8
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