US 7,321,809 B2
Methods and systems for analyzing engine unbalance conditions
John L. Vian, Renton, Wash. (US); and Matt H. Travis, Fall City, Wash. (US)
Assigned to The Boeing Company, Chicago, Ill. (US)
Filed on Dec. 30, 2003, as Appl. No. 10/750,294.
Prior Publication US 2005/0149234 A1, Jul. 07, 2005
Int. Cl. G01M 1/38 (2006.01)
U.S. Cl. 700—279  [73/66; 700/280; 706/23] 30 Claims
OG exemplary drawing
 
1. A method of analyzing an engine unbalance condition, the method comprising:
receiving vibrational data from a plurality of locations distributed over at least one of an engine and a surrounding engine support structure;
inputting the vibrational data into an artificial neural network control volume (ANNCV);
using a neural network inverse model, establishing a relationship between the vibrational data from the plurality of locations and an unbalance condition of the engine; and
outputting diagnostic information from the ANNCV, the diagnostic information indicating the unbalance condition of the engine, the diagnostic information including an unbalance magnitude and an angular location as a function of a rotational frequency of the engine.