FATIGUE TESTER

摘要

There is provided a fatigue tester having an improved accuracy. The fatigue tester (10) includes: a main body (11) having a test piece mounting section (20) and an actuator (40); and control means (60) for performing feedback control for feeding back a detection signal in accordance with a load applied to a test piece (1). In the fatigue tester (10), amplification ratio correction/zero-point correction calculation means (78) compares a waveform of a detected signal to a waveform of a target signal and performs calculations of the amplification ratio and the zero-point correction according to the comparison result. In this calculation, according to the convergence degree of the detected signal to the target value signal, the algorithm of calculation concerning the amplification ratio correction is stepwise switched. Moreover, in addition to the amplification ratio, the algorithm of calculation concerning the zero-point correction may also be switched stepwise.