Control for a gas turbine engine
This patent describes a gas turbine engine having fuel metering means for delivering fuel to the engine and including means for controlling the fuel metering means including speed control means and slave-datum control responsive to a speed request signal and limit signal for limiting the fuel metering means for producing a signal that is integrated with respect to time for controlling the speed control means, and slave-datum limit control means for further limiting the slave-datum control so that its output is indicative of the maximum or minimum constraints of the engine during the engine's acceleration and deceleration modes of operation whereby the windup effect on the speed control means is eliminated, the output produced by the slave datum limit control means is a function of the formula: ((maximum constraint) [minus] (KOP [times] 'slave-datum'))/KP + speed feedback, where: maximum constraint is the surge limit of the gas turbine engine. KOP [times] 'slave-datum' is the scheduled engine operating point required for steady state engine operation, KP is the proportional gain of an engine governor, KIP is the slope of an engine operating line and speed feedback is indicative of the rotational speed of the gas turbine engine.
- Assignee:
- United Technologies Corp., Hartford, CT (United States)
- Patent Number(s):
- US 5134845; A
- Application Number:
- PPN: US 7-555889
- OSTI ID:
- 6930237
- Resource Relation:
- Patent File Date: 23 Jul 1990
- Country of Publication:
- United States
- Language:
- English
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