Scientists at the Pacific Northwest National Laboratory (PNNL) have examined the necessity for understanding and controlling the aging process of both safety-specific plant components and the infrastructure that supports these processes. In this paper we examine the preliminary development of aging precursor metrics and their correlation with degradation rate and projected machine failure. Degr...

Currently, the existing condition-based maintenance (CBM) diagnostic test practices for ultrasound require tester to interpret results manually. Different testers may give different opinions or interpretations of detected ultrasound. It leads wrong interpretation due depending on experience. Furthermore, there is no commercially available product standardize data. Therefore, objective correct a...

The health status evolving from normal to broken condition of wear tool are needed as an object of assessment in condition-based maintenance (CBM). This paper proposes a continuous Hidden Markov Models (CHMM) to assess the status of the wear tool online based on the normal dataset in the same case. A waveletpackets technology is used to feature extraction and the CHMM is trained by Baum-Welch a...

Thanks to the advances in Internet of Things (IoT), Condition-based Maintenance (CBM) has progressively become one most renowned strategies mitigate risk arising from failures. Within any CBM framework, non-linear correlation among data and variability condition monitoring sources are main reasons that lead a complex estimation Reliability Indicators (RIs). Indeed, classic approaches fail fully...

For engineering and production systems, due to the structural dependence between components, disassembly operation caused by replacement of components will affect failure degradation processes other in system. In order optimize extended warranty (EW) cost multi‐component system with dependence, this paper described modeled impact, then rate model component considering impact under EW was develo...

Condition-based monitoring (CBM) has emerged as a critical instrument for lowering the cost of unplanned operations while also improving efficacy, execution, and dependability tools. Thermal abnormalities can be thoroughly examined using thermography condition monitoring. Thanks to advent high-resolution infrared cameras, researchers are paying more attention non-contact approach temperature ri...

There is an increasing desire to use rotorcraft Health and Usage Monitoring Systems (HUMS) to facilitate Condition Based Maintenance (CBM) approaches to achieve operating cost reductions and other benefits. This type of application must be supported by the certification process, as it is an example of a “maintenance credit”. Guidance material on the process of obtaining a credit is presented in...

Defects inside insulation of HV XLPE cable accessories can lead to partial discharge (PD) activity. When PD activity happens, leakage current may flow through the grounded line. To acquire the PD current signal, one practicable and effective method is placing a high frequency current transformer (HFCT) winding the grounded line. In order to measure the insulation degradation, a partial discharg...

According to reporting of international economic institutions there are risks recession worldwide at present. Actually, some challenges for the management process which is a critical in operations cement enterprises frequently. In view demanded advanced methods planning and control industry 4.0. addition this new trends requirements sustainability, environment protection, occupational health sa...