Patent ID: 11907856
Assignee: HITACHI, LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 7:
8. One or more non-transitory computer-readable media storing instructions that, when executed by one or more processors, program the one or more processors of a system to determine a plurality of operating parameter values for operating an equipment for maximizing a time-between-failure (TBF) duration for the equipment, the one or more processors further programmed to:
determine, for the equipment, a subset of the TBF durations including a plurality of the TBF durations that are longer than other TBF durations for the equipment;
determine, from sensor data corresponding to operation of the equipment during the TBF durations of the subset of the TBF durations, a plurality of measured sensor values for the equipment from a plurality of different sensors, each different sensor measuring a different operating parameter of the equipment;
create a plurality of decision trees, each respective decision tree corresponding to a different respective operating parameter of the plurality of operating parameters, each respective decision tree created based on the subset of TBF durations and respective measured sensor values of the plurality of different sensors, wherein each respective decision tree includes a plurality of nodes, and different ones of the nodes correspond to different measured sensor values of the plurality of measured sensor values of a respective one of the sensors corresponding to the respective decision tree, wherein a bottom layer of each respective decision tree includes a plurality of bottom nodes that each correspond to a respective operating parameter value for the respective operating parameter of the equipment for that respective decision tree, each bottom node including an associated score for each different operating parameter value for the respective operating parameter, the associated score indicative of a number of the TBF durations associated with that bottom node;
determine, for each decision tree of the plurality of decision trees, and for the bottom node having a highest associated score, a subset of the measured sensor values corresponding to the bottom node having the highest associated score;
determine a selected operating parameter value for each of the plurality of operating parameters for the equipment based on the subset of the measured sensor values corresponding to the bottom node having the highest associated score for each respective decision tree;
ranking the operating parameters for the equipment based on the respective scores of the selected operating parameter values determined from each of the respective decision trees in an order from higher to lower based on the respective scores;
determining an operating envelope prescribed for the equipment, the operating envelope including the plurality of selected operating parameter values for the plurality of respective operating parameters for operating the equipment; and
send at least one of a control signal or a communication based on the plurality of operating parameter values determined for the operating envelop for the equipment to cause the equipment to operate according to the plurality of operating parameter values specified in the operating envelope for the plurality of different operating parameters for the equipment, wherein, when operating the equipment according to the plurality of operating parameter values results in a conflict between two operating parameter values of the plurality of operating parameters, an operating parameter value of a first operating parameter having a higher score rank is prioritized for operation of the equipment over an operating parameter value for a second operating parameter having a lower score rank.