Gas turbine engine control system

A computer-based control system for a gas turbine engine, comprising:

• a controller comprising control logic, the controller configured to obtain a set of inputs formed by (i) measurements of one or more process variables and (ii) values of one or more engine operation set points, and the control logic configured to determine one or more process command values for operation of the gas turbine engine in response to the set of inputs;
• and
• an event detection unit configured to obtain further measurements of one or more process variables and determine whether an abnormal event has occurred based on the further measurements of one or more process variables;
• and
• wherein:
• the controller comprises a plurality of tuning variables for altering the one or more process command values output by the control logic in response to a given set of inputs, the tuning variables having respective standard values for normal operation of the gas turbine engine;
• the event detection unit is configured to output an event accommodation data array to the controller when an abnormal event is detected, each element in the event accommodation data array corresponding to a respective tuning variable and one or more of the elements assigned intervention values for their respective tuning variables;
• the controller is configured to update the tuning variables using the event accommodation data array, a given tuning variable being changed in response to detection of a given abnormal event when the respective element in the event accommodation data array is assigned an intervention value, and wherein the control system further comprises a database containing a plurality of pre-set data arrays for output as event accommodation data arrays, the event detection unit being configured to select one of the pre-set data arrays as the event accommodation data array;
• the pre-set data arrays correspond to respective abnormal events;
• and
• the event detection unit is configured to select a given pre-set data array as the event accommodation data array in response to detecting the respective abnormal event for that pre-set data array.