| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a testing machine which can be adjusted so as to make an amplitude of a measurement signal set to a set value even when the response of a whole system including a test piece changes because of a change in the rigidity of the test piece. <P>SOLUTION: A testing machine comprises: a setting signal generation unit 51 that generates a setting signal for providing a test piece with a predetermined load; a displacement meter that obtains a measurement signal of displacement occurring in the test piece; a PID control unit 53 that drives an hydraulic actuator by performing feed back control based on the setting signal and measurement signal; a gain setting unit 52 that sets a gain of a control parameter of the feed back control in the PID control unit 53 based on an amplitude ratio Px, the ratio of the amplitude of the measurement signal to that of the setting signal. <P>COPYRIGHT: (C)2012,JPO&INPIT |
