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PREDICTING ELECTROMECHANICAL ACTUATOR HEALTH AND REMAINING LIFE

  • US 20190325663A1
  • Filed: 04/23/2018
  • Published: 10/24/2019
  • Est. Priority Date: 04/23/2018
  • Status: Active Grant
First Claim
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1. A method comprising:

  • storing, on a computer system coupled to a controlled actuator system, a set of operational mode definitions, a reliability model per operational mode, the controlled actuator system comprising a motive force system coupled to and providing an operating force to a driven mechanical system, the motive force system associated with a plurality of motive force parameters, the driven mechanical system associated with a plurality of driven mechanical parameters, a reliability model representing a probability of failure of the controlled actuator system over time for each operational mode, each reliability model'"'"'s hazard rate regression model based on one or more of the plurality of motive force parameters and one or more of the plurality of driven mechanical parameters, the set of test definitions and analysis by which the plurality of driven and motive force parameters are acquired, and a plurality of statistical models that use the plurality of driven and motive force parameters to determine the probability of a system existing in an operational mode;

    receiving, over time, by the computer system and from a sensor system coupled to the controlled actuator system, one or more operational parameters of the controlled actuator system, the one or more operational parameters including one of the motive force parameters or one of the driven mechanical parameters, the one or more operational parameters representing a degradation of the controlled actuator system over time;

    updating, by the computer and based on the received one or more operational parameters, the reliability model according to the hazard rate regression model to represent a revised probability of failure of the controlled actuator system over time and the statistical model to represent a revised probability of existing in an operational mode;

    determining, by the computer system and based on the updated reliability model, that the controlled actuator system is approaching failure; and

    in response, transmitting, by the computer system, a signal indicating that the controlled actuator system is approaching failure.

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