Limit based threshold estimation for prognostics and health management
AssigneeAudi AG
InventorsSitaram Ramaswamy, Mothivel Mummudi
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Abstract
According to an embodiment, a method of monitoring the operation of a device includes determining a plurality of operational parameters that are indicative of an operation condition of the device. A difference between each operational parameter and a corresponding limit on that parameter is determined. Each limit indicates a value of the corresponding operational parameter that corresponds to an undesirable operation condition of the device. An action index is determined based on at least a smallest one of the determined differences. A determination is made whether the action index is within a range corresponding to desirable operation of the device.
Claims19
A method of monitoring the operation of a device, comprising the steps of:
- (A) determining a plurality of operational parameters that are indicative of an operation condition of the device;
- (B) determining a difference between each determined operational parameter and a corresponding limit on the operational parameter, each limit indicating a value of the corresponding operational parameter that corresponds to an undesirable operation condition of the device;
- (C) determining an action index based on at least a smallest one of the determined differences;
- and
- (D) determining whether the action index is within a range corresponding to desirable operation of the device.
A system for monitoring device operation, comprising:
- a plurality of detectors that provide respective indications of operational parameters that are indicative of an operation condition of the device;
- and
- a processor configured to
- determine a difference between each determined operational parameter and a corresponding limit on the operational parameter, each limit indicating a value of the corresponding operational parameter that corresponds to an undesirable operation condition of the device;
- determine an action index based on at least a smallest one of the determined differences;
- and
- determine whether the action index is within a range corresponding to desirable operation of the device.
Dependencies are inferred from the claim text.