Abstract: In accordance with at least one aspect of this disclosure, a sensing system includes a sensor mat configured to conform to a component having a central axis, a first sensor cluster disposed on or in the sensor mat configured to sense one or more conditions at a first location on the component, and a second sensor cluster disposed on or in the sensor mat configured to sense one or more conditions at a second location circumferentially spaced to the first location. In embodiments, the second location can be diametrically opposed to the first location.

Abstract: A method is provided for sensing proximity of a target. The method includes sensing inductance associated with a magnetic field, wherein the inductance is affected by the target when the target is proximate the magnetic field. The method further includes providing the sensed inductance for processing. The processing includes determining an inductance value from at least the sensed inductance and estimating a parameter of a gap between a location of sensing the inductance and the target as a function of the inductance value and application of a nonlinear model of a relationship between the gap and inductance.

Abstract: A method including identifying a plurality of maintenance schedules for a plurality of aircraft of a fleet of aircrafts each of which satisfy a minimum maintenance free operating period, monitoring and measuring a health of each of the aircrafts, utilizing the measured heath of the aircrafts within a degradation model in order to produce a plurality possible maintenance events for each of the aircrafts, each of the possible maintenance events associated with a different maintenance time, identifying at least one maintenance event for each aircraft in the fleet of aircraft using the set of possible maintenance events found for each aircraft from the plurality of maintenance schedules resulting in number of aircraft down for maintenance below a predetermined threshold, and executing the at least one maintenance event based on the at least one identified maintenance event.

Abstract: A method including identifying a plurality of maintenance schedules for a system each of which satisfy a minimum maintenance free operating period, monitoring and measuring a health of the system, utilizing the measured heath of the system within a degradation model in order to produce a plurality of system degradation sequences, identifying at least one maintenance event from the plurality of maintenance schedules, executing the at least one maintenance event based on the at least one identified maintenance event and utilizing the system until the next MFOP after the at least one maintenance event has been executed.

Abstract: A method is provided for sensing proximity of a target. The method includes sensing inductance associated with a magnetic field, wherein the inductance is affected by the target when the target is proximate the magnetic field. The method further includes providing the sensed inductance for processing.

Abstract: A method includes receiving, by an inventory management system (IMS) program executing on a computing device, a remaining useful life (RUL) formulation for a part of a machine that estimates an amount of time for which the part will continue to perform its intended function and a potential unscheduled maintenance event. The method also includes receiving, by the IMS program, replacement part order lead time data and anticipated replacement part inventory level data from a part inventory database. The method also includes determining, by the IMS program and based on the RUL formulation, the replacement part order lead time data, and the anticipated part replacement inventory level data, that an order for a replacement part should be initiated.