Abstract
The ability to forecast machinery health is vital to reducing maintenance costs, operation downtime and safety hazards. Recent advances in condition monitoring technologies have given rise to a number of prognostic models which attempt to forecast machinery health based on condition data such as vibration measurements. This paper demonstrates how the population characteristics and condition monitoring data (both complete and suspended) of historical items can be integrated for training an intelligent agent to predict asset health multiple steps ahead. The model consists of a feed-forward neural network whose training targets are asset survival probabilities estimated using a variation of the Kaplan–Meier estimator and a degradation-based failure probability density function estimator. The trained network is capable of estimating the future survival probabilities when a series of asset condition readings are inputted. The output survival probabilities collectively form an estimated survival curve. Pump data from a pulp and paper mill were used for model validation and comparison. The results indicate that the proposed model can predict more accurately as well as further ahead than similar models which neglect population characteristics and suspended data. This work presents a compelling concept for longer-range fault prognosis utilising available information more fully and accurately.
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Tan, A.C., Heng, A., Mathew, J. (2012). Utilising Reliability and Condition Monitoring Data for Asset Health Prognosis. In: Amadi-Echendu, J., Willett, R., Brown, K., Mathew, J. (eds) Asset Condition, Information Systems and Decision Models. Engineering Asset Management Review. Springer, London. https://doi.org/10.1007/978-1-4471-2924-0_4
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DOI: https://doi.org/10.1007/978-1-4471-2924-0_4
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