Method for analyzing measured signal in resonance fatigue test and apparatus using the same

A resonance fatigue test apparatus for a test article, the apparatus comprising:

• a test stand configured to fix one end of the test article;
• an exciter mounted on the test article and configured to apply a repeated force to the test article so as to induce oscillation;
• a controller connected to the exciter and configured to apply a driving force to the exciter;
• at least two measurement sensors attached to the test article and configured to measure a physical quantity caused by the oscillation of the test article and thereby to create a measured signal;
• and
• a processor configured to receive the measured signal from each of the at least two measurement sensors, and to extract a moment load from the received measured signal by considering all of a first measured value in a first direction due to a first direction load, a second measured value in a second direction due to the first direction load, a third measured value in the first direction due to a second direction load, and a fourth measured value in the second direction due to the second direction load.