Gas turbine engine controller with event trigger

A feedback control system of a gas turbine engine, comprising:

• a controller to control an operation of the gas turbine engine in accordance with current and previous measured states,
• the controller including a servo, a processor and a computer readable medium on which executable instructions are stored, and,
• when executed, the executable instructions cause the processor to:
• command the servo to perform model based control (MBC) executions in an event a difference between the current and previous measured states exceeds a threshold or the current measured state exceeds a limit;
• and to
• command the servo to skip the MBC executions in an event the difference does not exceed the threshold and the current measured state does not exceed the limit.

A gas turbine engine, comprising:

• a compressor-combustor-turbine (CCT) system by which mechanical energy is generated from combustion of compressed inlet air and fuel;
• and
• a feedback control system including a measurement unit configured to measure a state of the CCT system, a controller configured to control an operation of the CCT system in accordance with current and previous measured states and a feedback unit configured to provide feedback control information to the controller,
• the controller including a servo, a processor and a computer readable medium on which executable instructions are stored, and,
• when executed, the executable instructions cause the processor to:
• command the servo to perform model based control (MBC) executions in an event a difference between the current and previous measured states exceeds a threshold or the current measured state exceeds a limit;
• and to:
• command the servo to skip the MBC executions in an event the difference does not exceed the threshold and the current measured state does not exceed the limit.