Patent ID: 7827803
Filing Date: 2010-11-09
Classification: F01D,F02C,F02K,F04D,F05D

Abstract:
1. 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  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.