CONTROL APPARATUS FOR ESTIMATING OPERATING PARAMETER OF A GAS-TURBINE AEROENGINE

摘要

An apparatus for estimating operating parameter of a gas-turbine aeroengine is configured to calculate a rotational speed of the low-pressure turbine (N1) by retrieving preset first characteristics by at least a rotational speed of the high-pressure turbine (N2), an engine inlet temperature and a first amount of bled air, to calculate a compensating value (ΔN1) of the rotational speed of the low-pressure turbine by retrieving preset second characteristics by at least a second amount of bled air, and to calculate the rotational speed of the low-pressure turbine (N1) finally based on the calculated rotational speed of the low-pressure turbine (N1) and the compensating value (ΔN1) thereof.

主权项

1. An apparatus for estimating operating parameter of a gas-turbine aeroengine mounted on an aircraft and having at least a high-pressure turbine rotated by injection of high-pressure gas produced upon ignition and combustion of an air-fuel mixture in a combustion chamber, and a low-pressure turbine located downstream of the high-pressure turbine to be rotated by low-pressure gas exiting the high-pressure turbine, comprising:
a high-pressure turbine rotational speed sensor adapted to detect a rotational speed of the high-pressure turbine (N2); an engine inlet temperature sensor adapted to detect an inlet temperature of the engine (T1); a first bleed off valve position sensor adapted to detect a first amount of bled air flowing through a high-pressure compressor connected to the high-pressure turbine and bled through a first bleed off valve; a second bleed off valve position sensor adapted to detect a second amount of bled air flowing through the high-pressure compressor connected to the high-pressure turbine and bled through a second bleed off valve; a low-pressure turbine rotational speed calculator that calculates a rotational speed of the low-pressure turbine (N1) by retrieving preset first characteristics by at least the rotational speed of the high-pressure turbine (N2) detected by the high-pressure turbine rotational speed sensor, the inlet temperature of the engine (T1) detected by the engine inlet temperature sensor and the first amount of bled air detected by the first bleed off valve position sensor; a low-pressure turbine rotational speed compensating value calculator that calculates a compensating value (ΔN1) of the rotational speed of the low-pressure turbine (N1) by retrieving preset second characteristics by at least the second amount of bled air detected by the second bleed off valve position sensor; and a final low-pressure turbine rotational speed calculator that calculates the rotational speed of the low-pressure turbine (N1) finally based on the rotational speed of the low-pressure turbine (N1) calculated by the low-pressure turbine rotational speed calculator and the compensating value (ΔN1) calculated by the low-pressure turbine rotational speed compensating value calculator.