Browsing by Author "Kumar, N.S.H."

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    Evolution of the probability distribution function of shovel–dumper combination in open cast limestone mine using RWB and ANN: a case study
    (Springer Science and Business Media Deutschland GmbH, 2019) Kumar, N.S.H.; Choudhary, R.P.; Murthy, C.S.N.
    This newsletter affords a new analytic calculation for the shovel–dumper combination in open cast limestone mine evolution of the only and two galaxy probability density function (PDF). To broaden a nonparametric PDF for a combination of shovel and dumper in an open cast limestone mine, the ancient failure statistics which includes time between failure (TBF) of a shovel and dumpers had been accumulated from the mine. Primarily based on the collected TBF, Weibull parameters which include the shape parameter (?), scale parameter (?), and location parameter (?) have been calculated under the K–S test (Kolmogorov–Smirnov test) using Isograph Reliability Workbench (RWB). In addition, the artificial neural network (ANN) version has been developed to predict the PDF for the same shovel–dumper system and compared with the real acquired fee of RWB. It was found that the values of RMSC and R2 had been 5.96e?5 and 0.999 for PDF. The statistical effects showed that the proposed Reliability Isograph Workbench and PDF version correctly predicts PDF for the shovel–dumper system. © 2019, Springer Nature Switzerland AG.
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    Reliability-based analysis of probability density function and failure rate of the shovel–dumper system in a surface coal mine
    (Springer Science and Business Media Deutschland GmbH, 2021) Kumar, N.S.H.; Choudhary, R.P.; Murthy, C.S.
    The research article presents a reliability-based analysis of probability density function, and the failure rate of a shovel-dumper system was determined based on Weibull distribution in an open cast coal mine. Referring to the bathtub-model along with the Weibull distribution of a shovel and dumpers, decreasing, constant and increasing failure rates are represented using the RWB. To demonstrate the bathtub model and reliability model of combining shovel and dumpers, historical data such as TBF and TTR were used. The obtained bathtub curve shows that the influencing parameters such as ?, ? and ? had a better useful life after 7080 working hours. Also, the ANN model was developed to predict the PDF, failure rate and reliability function. It has been found that the values of RMSE and R2 were 0.00068 and 0.9565 for PDF, 0.0004342 and 0.98904 for failure rate and RMSE and R2 were 0.9739 and 0.000497 respectively. © 2020, Springer Nature Switzerland AG.