| 摘要 |
An electronic engine control for a gas turbine monitors a plurality of speed and temperature parameters. For each of the parameters a setpoint signal is produced that can be either fixed or variable and which is compared against the parameter signal to produce a difference signal proportional to the amplitude and rate of change of the difference between the parameter and setpoint signal. A gas generator minimum control signal is high selected with a power turbine minimum speed signal. The resulting high selected signal is then low selected with the power turbine average temperature and gas generator control signals. A low selection provides for fuel control to drive the most extreme variable parameter back to its setpoint by means of a feedback loop to an output driver circuit within a fuel valve card. The selected control signal is passed through a maximum speed integrator and a feedback loop to set the position of the fuel valve while feedback signals to two feedback loops are provided by a valve position signal monitoring a valve actuator. Failure to eliminate offset of the power turbine temperature signal from the power turbine temperature average for more than a fixed time produces a deviation signal to effect turbine shut down.
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