Research on key technology of dynamic calibration of fatigue testing machine

The measurement of specimens in the cyclic force under the action of fatigue life has a vital role, but the current calibration of fatigue testing machine commonly used static standard method to measure dynamic force, which will lead dynamic force error and affect the calibration accuracy of fatigue testing machine. In this paper, dynamic force of the fatigue testing machine is taken as the research object, multi-degree of freedom vibration model of fatigue testing machine is established, the dynamic force error influence of different factors is analyzed, the software and hardware design of the dynamic calibration is carried out, the fatigue testing machine’s calibration device is developed.