US 2016/0109319 A1 · METHOD AND APPARATUS OF MOMENT CALIBRATION FOR RESONANCE FATIGUE TEST

Abstract

A moment calibration method and apparatus are provided for a resonance fatigue test of a test article. In the moment calibration method, when a load applying unit of the apparatus applies a static load to the test article in a first direction so as to cause bending of the test article, a processor of the apparatus obtains a first measured value from a physical quantity measured by at least one measurement sensor attached to the test article. Also, when the load applying unit applies a static load to the test article in a second direction different from the first direction so as to cause bending of the test article, the processor obtains a second measured value from a physical quantity measured by the measurement sensor. Then the processor calculates a correlation between the first measured value, the second measured value, and moment values respectively calculated from the static loads applied in the first and second directions. By considering a dual-axis load state, the moment calibration method can obtain reliable calibration results exactly matching with a real fatigue test.

Claims15

Dependent claims

A moment calibration method for a resonance fatigue test of a test article, the method comprising steps of:

(a) applying a static load to the test article in a first direction so as to cause bending of the test article;
(b) obtaining a first measured value from a physical quantity measured by at least one measurement sensor attached to the test article;
(c) applying a static load to the test article in a second direction so as to cause bending of the test article, the second direction being different from the first direction;
(d) obtaining a second measured value from a physical quantity measured by the at least one measurement sensor attached to the test article;
and
(e) calculating a correlation between the first measured value, the second measured value, and moment values respectively calculated from the static loads applied in the first and second directions.

3 more elements

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

a test stand configured to fix one end of the test article;
at least one measurement sensor attached to the test article;
a processor configured to process a signal received from the measurement sensor;
and
a load applying unit configured to apply a static load to the test article,
wherein the processor obtains a first measured value from a physical quantity measured by the measurement sensor when the load applying unit applies a static load to the test article in a first direction so as to cause bending of the test article,
wherein the processor obtains a second measured value from a physical quantity measured by the measurement sensor when the load applying unit applies a static load to the test article in a second direction so as to cause bending of the test article, the second direction being different from the first direction, and
wherein the processor calculates a correlation between the first measured value, the second measured value, and moment values respectively calculated from the static loads applied in the first and second directions.

5 more elements

Dependencies are inferred from the claim text.

Method and apparatus of moment calibration for resonance fatigue test

Life of this patent

Method and apparatus of moment calibration for resonance fatigue test

Life of this patent

Abstract

Claims15