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High speed recorder for a gas turbine engine

  • US 10,151,215 B2
  • Filed: 05/31/2016
  • Issued: 12/11/2018
  • Est. Priority Date: 06/01/2015
  • Status: Active Grant
First Claim
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1. A method of monitoring a high speed rotary machine, the high speed rotary machine having a control system including a controller and a high speed recorder, the method comprising:

  • the controller sampling sensors connected to the high speed rotary machine on a predetermined sensor sampling interval and monitoring the high speed rotary machine for trigger events;

    the controller logging an array of sensor values obtained from the sensors and an occurrence of each trigger event including an event timestamp of when the trigger event occurred;

    the controller updating a map on a predetermined map publishing interval, the map being updated to include the trigger events that have occurred within the last timeframe of the map publishing interval and a map header that is changed each time the map is updated;

    the high speed recorder reading the sensor values obtained for each of the sensors from the controller on a predetermined sensor reading interval and checking the map header for a change to the map header on a predetermined map reading interval, the high speed recorder setting a flag when the map header has changed, and the high speed recorder reading the map during a next loop of the map reading interval, the map reading interval being shorter than the map publishing interval; and

    the control system assigning timestamps on a same temporal axis by assigning a sensor timestamp to each sensor value on the same temporal axis as the event timestamps assigned by the controller.

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