Patent ID: 9593592
Date: 2017-03-14
CPC Classifications: F01D,F05D,G01H,G01M

Claim:
1. A method of analysing blade tip timing data obtained from an array (P k ) of stationary timing probes that are spaced at integer multiples of a base angle, the method comprising steps to: a) replace one of the probes in the array of probes (P b) set an initial probe angle (θ c) calculate a condition number (CN) for the virtual probe set; d) if the condition number (CN) at least meets a threshold criterion, solve the virtual probe set for blade tip displacement amplitude; if the condition number (CN) does not meet the threshold criterion, e) for i=1 to m, increment the probe angle (θ f) for j=1 to n, increment the engine order (EO g) for k=1 to q, reinstate the replaced probe in the data analysis set and replace a different probe from the array of probes (P