Abstract: A system and method for reducing the vibration response of a rotating system are provided. In one aspect, an optimized balance shot or solution that indicates one or more physical locations at which one or more balancing weights are to be added or removed from the rotating system is generated. The balance shot is generated based on a transfer function that is customized specifically for the rotating system. The transfer function is generated by applying one or more machine-learned models to parameter values for parameters that are associated with the rotating system. The machine-learned models can generate main effects plots, and from the plots, an effective set of parameter values can be determined. The transfer function can be generated using the effective set of parameter values so that the transfer function used to generate the balance shot is optimized specifically for the rotating system undergoing the balancing process.

Abstract: Predictive models for diagnosing the unbalance state in an aircraft engine such as a jet engine based on engine vibrations and other known and/or determinable parameters are disclosed. Also disclosed are methods for developing the predictive model and using the model to identify aircraft engine unbalance.

Abstract: Systems, methods, and a gas turbine engine that includes features for condition monitoring of a damper thereof are provided. In one aspect, a gas turbine engine includes a rotary component, a bearing operatively coupled with the rotary component, and a damper associated with the bearing. The gas turbine engine also includes sensors and a controller. The controller receives data that includes sensed and/or calculated parameter values. The controller generates a damper severity index based on the parameter values. The damper severity index indicates a health state of the damper. The controller determines whether the damper severity index exceeds a threshold. When the damper severity index exceeds the threshold, a notification indicating the health state of the damper is generated. A computing system can determine a fault type and a remaining useful life of the damper and can update controller logic based on field data received from engines in a fleet.