Nonlinear Time Series Modelling: Monitoring a Drilling Process

Exponential autoregressive (ExpAr) time series models are able to reveal certain types of nonlinear dynamics such as fixed points and limit cycles. In this work, these models are used to model a drilling process. This modelling approach provides an on-line monitoring strategy, using control charts, of the process in order to detect dynamic disturbances and to secure production with high quality.