| 摘要 |
PURPOSE:To control a vibrating machine stably, by modifying the stress level while comparing the vibration load detected from a load detector with a aimed stress waveform, and outputting a modified stress waveform signal simultaneously from each vibrating machine. CONSTITUTION:The load detectors 4-6 for detecting vibration load applied to a test piece T by the vibrating machines 1-3, are provided to the machines 1-3 respectively. The detected signals of the detectors 4-6 are inputted, and compared with the aimed stress waveform applied to the piece T by the machines 1-3, the modified stress waveform signal is obtained so that the stress level is modified equal to the aimed stress waveform, and a control device 7 for outputting the signal to the machines 1-3 simultaneously is provided. In this way, fatigue test can be performed while always applying the vibration load having stress waveform of a fixed stress level. |
