| 摘要 |
PURPOSE:To prevent an error of a higher order mode by deciding that a displacement quantity of a specimen has reached a displacement target value, when it has entered into a convervence allowable area of the displacement target value, outputting a displacement command value from a displacement controller, and controlling a load quantity of a displacement loading device. CONSTITUTION:An experimental device is constituted of displacement loading devices 2a, 2b, load detectors 3a, 3b, a target value operator 5 and a displacement controller 7 having a convergence allowable area setting device, etc. In this state, based on a load quantity by the displacement loading device, and a mathematical expression model of a specimen 1 given by a constant setting device 6, displacement target values Xa, Xb of the specimen 1 are calculated by the target value operator 5. Subsequently, a convergence allowable area is set to the displacement target values Xa, Xb, and when displacement quantities Ya, Yb of the specimen 1 have entered into this area, it is decided that they have reached the displacement target values Xa, Xb, and displacement command values Va, Vb are outputted. In this way, in the displacement loading devices 2a, 2b, the generation of an error having a regularity in the undershoot side can be prevented. |
