| 摘要 |
PROBLEM TO BE SOLVED: To provide a fatigue tester, of which the testing precision can be enhanced, capable of being utilized in a hydraulic servo fatigue tester or the like for acquiring ultrahigh cycle region data. SOLUTION: The fatigue tester 10 is equipped with a main body 11 having a test piece attaching part 20 and an actuator part 40, and a control means 60 which performs feedback control for feeding back the detection signal corresponding to the load applied to a test piece 1 and constituted so that the algorithm of the calculation processing related to the correction of a mu-factor is stepwise changed over corresponding to the converging degree to a target value signal of a detection signal when the waveform of the detection signal is compared with that of the target value signal and the calculation processing related to the correction of the mu-factor and a zero point is performed on the basis of the comparison result by a mu-factor/zero point correcting calculation means 78. Further, this tester may be constituted so as to stepwise change over the algorithm of the calculation processing related to the correction of not only the mu-factor but also the zero point. COPYRIGHT: (C)2005,JPO&NCIPI
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