| 摘要 |
PURPOSE:To reduce stress remedy by executing the remedy for a maximum stress value of a plurality of stopping frequencies of operations by limiting the frequencies to the plurality. CONSTITUTION:A plurality of stopping frequencies of operations are provided, and set to fmin, f1-f3. For example, when an operating frequency is a resonance frequency f02 having a high stress value, the operation is stopped at the f2 in which the frequency is reduced. The maximum stress value corresponding to the stopping frequencies fmin, f1-f3 of the plurality has large probability when it is smaller than the maximum stress value of the stopping frequency at each 1Hz, and a stress remedy of the case that the plurality of the stopping frequencies are provided may be less that much. Further, a measuring test of the stress value of the positions of the plurality of the frequencies fmin, f1-f3 may be conducted, and hence a testing man-hour can be largely omitted. |
