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US 10,126,209 B2Granted
Limit based threshold estimation for prognostics and health management
AssigneeAudi AG
InventorsSitaram Ramaswamy, Mothivel Mummudi Boopathy
Life of this patent
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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.
Claims20
A method of operating a fuel cell system, the method comprising:
- receiving, by one or more hardware processors and from a plurality of sensors communicatively coupled to the fuel cell system, sensor information indicative of a plurality of operational conditions of the fuel cell system;
- for each of multiple operational parameters associated with the indicated plurality of operational conditions, determining, by the one or more processors and based at least in part on the received sensor information, a difference between an observed value for the operational parameter and a corresponding limit for the operational parameter, the corresponding limit indicating one or more undesirable values for the operational parameter;
- generating, by the one or more processors and based at least in part on a smallest one of the determined differences, one or more action indexes for the fuel cell system;
- determining, by the one or more processors, whether at least one of the one or more action indexes is not within an acceptable range;
- and
- responsive to determining that the at least one action index is not within the acceptable range, initiating, by the one or more processors, one or more corrective actions regarding the fuel cell system.
3 more elements
A hardware device control system, comprising:
- a plurality of detectors that provide respective indications of multiple operational parameters that are indicative of one or more operational conditions of a hardware device;
- a user interface that, in operation, provides information related to at least one of the one or more operational conditions of the hardware device;
- and
- a hardware processor that is communicatively coupled to the plurality of detectors and to the user interface and that, in operation, performs a method that includes to:
- determine, for each of the multiple operational parameters, a difference between an observed value for the operational parameter and a corresponding limit for the operational parameter, wherein the corresponding limit identifies one or more undesirable values for the operational parameter;
- generate an action index based at least in part on a smallest one of the multiple determined differences;
- determine whether the generated action index is within a defined acceptable range corresponding to desirable operation of the hardware device;
- and
- in response to a determination that the generated action index is not within the defined acceptable range, initiate one or more corrective actions, wherein to initiate the one or more corrective actions includes presenting, via the user interface and one or more electronic signals generated by the hardware processor, an indication that the generated action index is not within the defined acceptable range.
6 more elements
A method of operating a fuel system that includes a plurality of sensors, the method comprising:
- receiving, by one or more hardware processors and from the plurality of sensors, sensor information indicative of a plurality of operational conditions for the fuel system;
- determining, by the one or more hardware processors and based at least in part on the received sensor information, a plurality of operational parameters associated with the indicated plurality of operational conditions;
- for each of multiple of the determined operational parameters, determining, by the one or more hardware processors and based at least in part on the received sensor information, a difference between an observed value for the operational parameter and a corresponding limit for the operational parameter, the corresponding limit indicating one or more undesirable values for the corresponding operational parameter;
- generating, by the one or more hardware processors and based on a smallest one of the determined differences, one or more action indexes for the fuel system;
- determining, by the one or more hardware processors, whether at least one of the one or more action indexes is not within an acceptable range;
- and
- responsive to determining that the at least one action index is not within the acceptable range initiating, by the one or more hardware processors, one or more corrective actions regarding the fuel system.
4 more elements
Dependencies are inferred from the claim text.