Abstract: A system designed for failure detectability through detection and isolation of a particular design feature.

Abstract: An actuator control system is disclosed that includes an actuator continuously movable between multiple positions. The controller is configured to command the actuator to a desired actuator position and to apply the command to an actuator model. The controller is configured to compare the modeled and actual actuator positions to determine if the position difference exceeds a fault detection accommodation limit and if the position difference is within a band that is different than the fault detection accommodation limit. The controller is configured to calculate a threshold, which is based upon an estimated load on the actuator. The controller is configured to calculate a band comprised of the threshold applied to the modeled position and to determine if the actual actuator position is within the calculated band. The threshold is calculated at regular intervals, and a fault is declared if the actual actuator position is outside the band for a number of consecutive intervals.

Abstract: An actuator control system is disclosed that includes an actuator continuously movable between multiple positions. The controller is configured to command the actuator to a desired actuator position and to apply the command to an actuator model. The controller is configured to compare the modeled and actual actuator positions to determine if the position difference exceeds a fault detection accommodation limit and if the position difference is within a band that is different than the fault detection accommodation limit. The controller is configured to calculate a threshold, which is based upon an estimated load on the actuator. The controller is configured to calculate a band comprised of the threshold applied to the modeled position and to determine if the actual actuator position is within the calculated band. The threshold is calculated at regular intervals, and a fault is declared if the actual actuator position is outside the band for a number of consecutive intervals.

Abstract: A method and system of evaluating the criticality of parameters by evaluating consequences of a loss of capability to determine a desired operating parameter, identification of alternate means of obtaining the parameter, and assigning an importance value to the capability of determining the operating parameter. The resulting evaluation and identification is utilized to direct design and mitigation efforts.

Abstract: A system designed for failure detectability through detection and isolation of a particular design feature.

Abstract: A foreign-object/domestic-object damage assessment system for a gas turbine engine comprises a multiplicity of sensors, manifold feature extraction modules, a multiform analysis module, a hybrid operational data store and an operator/maintenance interface. The sensors characterize a multiplicity of engine parameters relating to the gas turbine engine. The feature extraction modules extract manifold features from the multiplicity of engine parameters. The analysis module performs a multiform analysis on the manifold features. The operational data store correlates the manifold features with maintenance actions via a hybrid engine model. The operator/maintenance interface transmits maintenance requests as a function of the multiform analysis, as compared to the hybrid engine model.