Method and apparatus for on-board/off-board fault detection

摘要

A method for monitoring a subsystem of a subject vehicle includes, in an off-board environment, executing a controller-based scheme. The scheme includes determining a plurality of residuals based upon expected and observed states of parameters associated with operation of the subsystem, determining a subsystem operating signature based upon the residuals, employing the subsystem operating signature to isolate a subsystem fault, and communicating the subsystem fault to an on-board controller of the subject vehicle.

主权项

1. A method for monitoring a subsystem of a subject vehicle, comprising:
when an on-board algorithm detects unexpected behavior in the subsystem, communicating subsystem data to an off-board environment; in the off-board environment, executing a controller-based scheme comprising:
determining a plurality of residuals based upon expected and observed states of parameters associated with operation of the subsystem;determining a subsystem operating signature based upon the residuals;employing the subsystem operating signature to isolate a subsystem fault by comparing the subsystem operating signature to a subsystem fault isolation matrix determined in an off-line control scheme; andcommunicating the subsystem fault from the off-board environment to an on-board controller of the subject vehicle.