Pontificia Universidad Católica de Chile Pontificia Universidad Católica de Chile
Hurtado D.E., Villarroel N., Andrade C., Retamal J., Bugedo G. and Bruhn A. (2017)

Spatial patterns and frequency distributions of regional deformation in the healthy human lung

Revista : Biomechanics and Modeling in Mechanobiology
Volumen : 16
Número : 4
Páginas : 1413-1423
Tipo de publicación : ISI Ir a publicación


This paper offers an original methodology to set multi-dimensional maintenance policies for machines whose aging processes require using multiple time scales. It can be considered a generalization of the traditional approach, that usually employs a unique time scale and sets a single age limit to carry out preventive maintenance actions. The methodology also considers situations in which a set of machines are operated using multiple usage profiles. We define usage profile as the relationship between the use of a machine in terms of one main time scale and another scale. In our case study the age of a mining haul-truck component can be best modeled as a combination of operating hours and load cycles since the last overhaul. We compare the results obtained with respect to using a single time scale policy. The comparison shows the importance of the bias in decision making that may arise due to incomplete modelling of the components’ aging process.