US 12,288,425 B2
Vehicle health management using a counterfactual machine learning model to optimize maintenance parameters
Alexander Waagen, San Jose, CA (US); Aruna Jammalamadaka, Camarillo, CA (US); Alice A. Murphy, Mesa, AZ (US); Derek S. Fok, Mesa, AZ (US); Douglas Peter Knapp, Ridley Park, PA (US); and Tsai-Ching Lu, Thousand Oaks, CA (US)
Assigned to The Boeing Company, Chicago, IL (US)
Filed by The Boeing Company, Chicago, IL (US)
Filed on Jun. 1, 2022, as Appl. No. 17/805,007.
Prior Publication US 2023/0394889 A1, Dec. 7, 2023
Int. Cl. G07C 5/00 (2006.01); G06F 18/214 (2023.01); G07C 5/08 (2006.01)
CPC G07C 5/006 (2013.01) [G06F 18/214 (2023.01); G07C 5/0816 (2013.01); G07C 5/0841 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for reducing a cost and an out of service time for inspecting, reworking, or replacing, a part on an aircraft, the method comprising:
measuring, with a sensor for the part on the aircraft, an environment for the aircraft and metrics for the part on the aircraft;
sending measurements of the environment and the metrics from the sensor to a processor comprising code specially programmed for:
generating a domain invariant representation of historical metric values from historical sensor information for a set of metrics and historical maintenance events for a part, wherein a bias caused by the historical maintenance events is reduced in the domain invariant representation;
training a counterfactual machine learning model using the domain invariant representation to predict sensor data and a maintenance event;
determining different maintenance thresholds for maintenance parameters for a metric in the set of metrics for performing maintenance on the part on the aircraft using the counterfactual machine learning model trained with the domain invariant representation;
selecting maintenance thresholds for the maintenance parameters from the different maintenance thresholds meeting an objective forming a maintenance plan for inspecting, reworking, or replacing, the part before a failure of the part on the aircraft; and
using the maintenance plan, executing at least one of: inspecting, reworking, or replacing the part before the failure of the part on the aircraft.