Development and experiment on dynamic calibration device of fatigue testing machine
                                                 LIU Meiling1, LUO Xin2, CHEN Hongfang1, LI Shishuai1
(1.Beijing University of Technology College of Mechanical Engineering &Applied Electronics Technology, Beijing 100124, China; 2.Beijing Institute of Metrology, Beijing 100029, China）

Abstract: Aiming at the lack of methods and means to evaluate the dynamic response characteristics of the fatigue tester, the dynamic calibration device of the fatigue tester was studied. A set of hardware devices and visualization software analysis systems based on LabVIEW were developed. The accelerometercompensated dynamic inertial error technique was applied to the dynamic calibration of a fatigue tester, and a complete forcemeasuring system was constructed in conjunction with a straintype force sensor. Through the dynamic force measurement reference device, the static characteristics and dynamic response characteristics of the device were evaluated to determine, whether the system can detect the selfacceleration and achieve the purpose of compensating the inertia error.The results indicate that the static and dynamic characteristics of the system are in line with the requirements of the “Standard Test Instrument Verification Rules” and “Axial Load Fatigue Tester Verification Regulations”. The device meets the verification standards and can accurately complete the fatigue tester calibration.

Key words: fatigue testing machine; dynamic characteristics; fast Fourier transform; force sensor