HIGH SPEED RECORDER FOR A GAS TURBINE ENGINE

摘要

A control system for a gas turbine engine is disclosed. In embodiments, control system includes a controller and a high speed recorder. The controller obtains sensor values from sensors connected to the gas turbine engine and publishes a map of trigger events. The high speed recorder reads the sensor values from the controller. The high speed recorder checks a map header for a change to the map header on a predetermined map reading interval, sets a flag when the map header has changed, and reads the map during the next loop of the map reading interval. The control system maintains timestamps assigned for the sensor values and to the trigger events on the same temporal axis.

主权项

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 the 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 values obtained for each sensor 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 the next loop of the map reading interval, the map reading interval being shorter than the map publishing interval; and the control system assigning all timestamps on the 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.