US 7,827,803 B1Granted

Method and apparatus for an aerodynamic stability management system

AssigneeGeneral Electric Company

InventorsAspi Rustom Wadia, David K. Christensen, Andrew Breeze-Stringfellow, Kiyoung Chung, Matthew William Wiseman, Peter Nicholas Szucs

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Abstract

A method for using an aerodynamic stability management system is disclosed. The method includes placing at least one pressure sensor in a compressor, the at least one pressure sensor communicating with an aerodynamic stability management system controller and monitoring gas turbine engine performance using the aerodynamic stability management system controller. The controller includes a memory, an input/output interface and a processor. The method also includes defining a correlation threshold value and calculating a correlation measure using a plurality of pressure signals generated by the at least one pressure sensor and comparing the correlation measure with the correlation threshold value. When the correlation measure is less than the correlation threshold value a corrective action is implemented.

Claims20

Dependent claims

A method for using an aerodynamic stability management system comprising:

placing at least one pressure sensor in a compressor, the at least one pressure sensor being in communication with an aerodynamic stability management system controller;
monitoring a gas turbine engine performance using the aerodynamic stability management system controller, the controller including a memory, an input/output interface and a processor;
defining a correlation threshold value and calculating a correlation measure using a plurality of pressure signals generated by the at least one pressure sensor, wherein calculating the correlation measure includes calculating the correlation measure according to a formula given by
C
⁡
(
n
)
=
∑
i
=
n
-
wnd
n
⁢
⁢
(
p
i
·
p
i_shaft
)
(
∑
i
=
n
-
wnd
n
⁢
p
i
2
)
·
(
∑
i
=
n
-
wnd
n
⁢
p
i_shaft
2
)
where C(n) is the correlation measure, p is a high-passed pressure signal, i is an index, shaft is a number of samples in one shaft revolution, n is a current sample index and wnd is a correlation window in number of samples;
and
comparing the correlation measure with the correlation threshold value, when the correlation measure is less than the correlation threshold value implementing a corrective action.

52 more elements

Dependencies are inferred from the claim text.