1. A system for predicting a condition, the system comprising: an electric machine, the electric machine including a rotating shaft and two or more slip rings disposed about the rotating shaft; an exciter providing a current and a voltage to the electric machine through the two or more slip rings; and a monitoring device configured to periodically measure the current and voltage provided by the exciter to the electric machine, the monitoring device further configured to: group a first plurality of currents and into a current sample; create a regression model from the current sample; group a second plurality of currents and voltages into a next sample; calculate a series of predicted parameters with the regression model using values from the next sample; and generate an alarm when the predicted parameters exhibit specific variations from the next sample.